A question about placing 2 ethernet adapters on the same network


hsehestedt

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I had always been taught that you do not want to place 2 ethernet adapters in one machine on the same subnet unless you have some sort of NIC teaming software because this would cause conflicts.

However, I was testing something completely different (I'll spare you the long story), and on a Mini PC with 2 Realtek gigabit Ethernet adapters, I plugged them both into the same network. I should note that most machines on my network are 2.5 Gb, so I am able to see speed increases over normal gigabit Ethernet by transferring files to / from a machine with a 2.5 Gb adapter.

Completely unexpectedly, not only did networking work just fine with the adapters connected, but my speed actually doubled. When I copy files from a machine with a 2.5 Gb Ethernet connection, I jump from transferring about 113 MB/s to about 225 MB/s. When I look at the individual adapters, I see that each has its own IP address. So, this clearly indicates that there is some sort of load balancing operation going on here.

Documentation I am finding still suggests NOT connecting 2 adapters to the same network but I don't know if this is simply old info or something my Realtek drivers work around.

With this in mind, here are my questions:

1) Is this capability something new in Windows or is this capability provided by the Realtek drivers?

2) If this is a Windows capability without the need for special drivers, does it depend upon having 2 identical adapters or could you use a mix of adapters, for example, 1 Intel and 1 Realtek?

3) I know that newer versions of Windows 10 (2004+) and Windows 11 introduced a new driver model for Network adapters, known as "CX" drivers. Is this at all responsible for this?

Side note: This is an ultra-cheap Intel N95 based Mini PC. I was a bit surprised to be able to get this kind of performance out of it.
 

My Computers

System One System Two

  • OS
    Win11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    1Gb Up / 1 Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Win11 Pro 23H2
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 13x Gen 2
    CPU
    Intel i7-1255U
    Memory
    16 GB
    Graphics card(s)
    Intel Iris Xe Graphics
    Sound Card
    Realtek® ALC3306-CG codec
    Monitor(s) Displays
    13.3-inch IPS Display
    Screen Resolution
    WQXGA (2560 x 1600)
    Hard Drives
    2 TB 4 x 4 NVMe SSD
    PSU
    USB-C / Thunderbolt 4 Power / Charging
    Mouse
    Buttonless Glass Precision Touchpad
    Keyboard
    Backlit, spill resistant keyboard
    Internet Speed
    1Gb Up / 1Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    WiFi 6e / Bluetooth 5.1 / Facial Recognition / Fingerprint Sensor / ToF (Time of Flight) Human Presence Sensor
I'm just guessing, but it sounds like your cards/drivers are setup and supporting smb multichannel

 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Beelink SEI8
    CPU
    Intel Core i5-8279u
    Motherboard
    AZW SEI
    Memory
    32GB DDR4 2666Mhz
    Graphics Card(s)
    Intel Iris Plus 655
    Sound Card
    Intel SST
    Monitor(s) Displays
    Asus ProArt PA278QV
    Screen Resolution
    2560x1440
    Hard Drives
    512GB NVMe
    PSU
    NA
    Case
    NA
    Cooling
    NA
    Keyboard
    NA
    Mouse
    NA
    Internet Speed
    500/50
    Browser
    Edge
    Antivirus
    Defender
    Other Info
    Mini PC used for testing Windows 11.
  • Operating System
    Windows 10 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom
    CPU
    Ryzen 9 5900x
    Motherboard
    Asus Rog Strix X570-E Gaming
    Memory
    64GB DDR4-3600
    Graphics card(s)
    EVGA GeForce 3080 FT3 Ultra
    Sound Card
    Onboard
    Monitor(s) Displays
    ASUS TUF Gaming VG27AQ. ASUS ProArt Display PA278QV 27” WQHD
    Screen Resolution
    2560x1440
    Hard Drives
    2TB WD SN850 PCI-E Gen 4 NVMe
    2TB Sandisk Ultra 2.5" SATA SSD
    PSU
    Seasonic Focus 850
    Case
    Fractal Meshify S2 in White
    Cooling
    Dark Rock Pro CPU cooler, 3 x 140mm case fans
    Mouse
    Logitech G9 Laser Mouse
    Keyboard
    Corsiar K65 RGB Lux
    Internet Speed
    500/50
    Browser
    Chrome
    Antivirus
    Defender.
Many moons ago, I played with a general purpose desktop PC with 2 PCIe NICs (I still have the 2 expansion cards!) and Sophos UTM software. I forgot all the details, but you may want to read the following. There may be other info on the website.

 

My Computer

System One

  • OS
    Windows 10 Pro
Ive had Gigabyte boards with duel Ethernet inputs. Possibly as far back as Win 8.
Never had to do anything special, always seemed faster.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 23H2 Build: 22631.3374
    Computer type
    PC/Desktop
    Manufacturer/Model
    Sin-built
    CPU
    Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz (4th Gen?)
    Motherboard
    ASUS ROG Maximus VI Formula
    Memory
    32.0 GB of I forget and the box is in storage.
    Graphics Card(s)
    Gigabyte nVidia GeForce GTX 1660 Super OC 6GB
    Sound Card
    Onboard
    Monitor(s) Displays
    4 x LG 23MP75 1 x 24" LG M38H 1 x 32" LF6300 TV Monitor 1 x Wacom Pro 22" Tablet
    Screen Resolution
    All over the place
    Hard Drives
    2 x WD something Something 8TB HDD's / 2 x WD something Something 4TB HDD's / 1 x EVO 1TB SSD / 2 x QVO 1TB SSD's / 1 x EVO 250 GB SSD / 2 x QVO 1TB (External Hub) / 1 x EVO 1TB (Portable Backup Case)
    PSU
    Silverstone 1500
    Case
    NZXT Full Tower
    Cooling
    Noctua NH-D15 Elite Class Dual Tower CPU Cooler / 6 x EziDIY 120mm / 2 x Corsair 140mm somethings / 1 x 140mm Thermaltake something / 2 x 200mm Corsair.
    Keyboard
    Corsair K95 / Logitech diNovo Edge Wireless
    Mouse
    Logitech G402 / G502 / Mx Masters / MX Air Cordless
    Internet Speed
    100/40Mbps
    Browser
    All sorts
    Antivirus
    Kaspersky Premium
    Other Info
    I’m on a horse.
  • Operating System
    Windows 11 Pro 22621.2215
    Computer type
    Laptop
    Manufacturer/Model
    LENOVO Yoga 7i EVO OLED 14" Touchscreen i5 12 Core 16GB/512GB
    CPU
    Intel Core 12th Gen i5-1240P Processor (1.7 - 4.4GHz)
    Memory
    16GB LPDDR5 RAM
    Graphics card(s)
    Graphics processor is an Intel Iris Xe
    Sound Card
    optimized with Dolby Atmos®
    Screen Resolution
    QHD 2880 x 1800 OLED
    Hard Drives
    M.2 512GB
    Other Info
    …still on a horse.
I've performed a good deal of testing since yesterday, so I thought that I would just share my results.

The headline is that it seems that Windows can simply handle multiple NICs on the same LAN segment automatically. I have tried multiple systems that had 2 realtek gigabit Ethernet interfaces and connected both to the same network. In order for this test to be valid, it's necessary that the network be faster than gigabit to see if performance is actually improved by doing this. My network is a 2.5GB network. Sure enough, performance doubled. Since these were two realtek adapters I thought it possible that the realtek driver was responsible.

Next test: Still 2 NICs in this test, but I connected a USB 2.5Gb adapter to a system with a built-in GB Ethernet interface. To see if any performance increase would be observed I forced the speed of the 2.5GB adapter down to 1GB. Sure, this also worked.

Finally, for the most difficult test, I tested a system that has both an Intel and a Realtek NIC and even this worked.

In each case, I also fired up Performance Monitor and could clearly see that traffic was being sent / received on both interfaces.

Bottom line is that somewhere along the line, Microsoft snuck in this capability without telling me :-). This may also explain why the Interface metric seems to make no difference - it may simply be that since both interfaces will be active there is no need for one to take priority over the other.
 

My Computers

System One System Two

  • OS
    Win11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    1Gb Up / 1 Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Win11 Pro 23H2
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 13x Gen 2
    CPU
    Intel i7-1255U
    Memory
    16 GB
    Graphics card(s)
    Intel Iris Xe Graphics
    Sound Card
    Realtek® ALC3306-CG codec
    Monitor(s) Displays
    13.3-inch IPS Display
    Screen Resolution
    WQXGA (2560 x 1600)
    Hard Drives
    2 TB 4 x 4 NVMe SSD
    PSU
    USB-C / Thunderbolt 4 Power / Charging
    Mouse
    Buttonless Glass Precision Touchpad
    Keyboard
    Backlit, spill resistant keyboard
    Internet Speed
    1Gb Up / 1Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    WiFi 6e / Bluetooth 5.1 / Facial Recognition / Fingerprint Sensor / ToF (Time of Flight) Human Presence Sensor
I've performed a good deal of testing since yesterday, so I thought that I would just share my results.

The headline is that it seems that Windows can simply handle multiple NICs on the same LAN segment automatically. I have tried multiple systems that had 2 realtek gigabit Ethernet interfaces and connected both to the same network. In order for this test to be valid, it's necessary that the network be faster than gigabit to see if performance is actually improved by doing this. My network is a 2.5GB network. Sure enough, performance doubled. Since these were two realtek adapters I thought it possible that the realtek driver was responsible.

Next test: Still 2 NICs in this test, but I connected a USB 2.5Gb adapter to a system with a built-in GB Ethernet interface. To see if any performance increase would be observed I forced the speed of the 2.5GB adapter down to 1GB. Sure, this also worked.

Finally, for the most difficult test, I tested a system that has both an Intel and a Realtek NIC and even this worked.

In each case, I also fired up Performance Monitor and could clearly see that traffic was being sent / received on both interfaces.

Bottom line is that somewhere along the line, Microsoft snuck in this capability without telling me :-). This may also explain why the Interface metric seems to make no difference - it may simply be that since both interfaces will be active there is no need for one to take priority over the other.
I don't doubt the validity of your experiments, but I don't think that the answer is as simple as 'Windows does it'. In the 7-layer OSI model, Ethernet is in the second layer from the bottom, the Data Link Layer, so Windows as Operating System only controls it via network drivers > the answer thus resides in the pertinent IEEE standards on the Data Link Layer, but I'm too lazy to dig further, the days I was involved in such matters was something like 2 reincarnations ago LOL LOL

 

My Computer

System One

  • OS
    Windows 10 Pro
So, this clearly indicates that there is some sort of load balancing operation going on here
That's what I also concluded today!!! With or without a network bridge, Windows 11 seems to natively balance the traffic among all the adapters!!!
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    DELL Optiplex 380
    CPU
    Intel Core 2 Quad Q9550 @ 2.83 GHZ
    Motherboard
    DELL G41 0HN7XN
    Memory
    8 GB DDR3 1333 MHz
    Graphics Card(s)
    AMD RX 550 LEXA 4GB DX12 128-BIT
    Sound Card
    Onboard HD Audio
    Monitor(s) Displays
    AOC 32" 60 Hz
    Screen Resolution
    1920 x 1080
    Hard Drives
    1x SSD Hynix 1 TB (Windows 11)
    1x SSD Hynix 1 TB (Swap File / Recovery / System Backup)
    1x HDD Seagate Barracuda Green 4 TB (Main Storage)
    PSU
    DELL 345W
    Case
    DELL SFF
    Cooling
    DELL STOCK AIR COOLER
    Keyboard
    MULTILASER GAMER
    Mouse
    MULTILASER GAMER
    Internet Speed
    600 MBPS
    Browser
    EDGE/CHROME
    Antivirus
    AVAST PREMIUM
    Other Info
    OLD DELL RIGS ARE BRAVE
  • Operating System
    Windows 10
    Computer type
    Laptop
    Manufacturer/Model
    Samsung
    CPU
    Core i3 4005 1.7 GHZ
    Motherboard
    Unknown
    Memory
    8 GB DDR4 2133 MHZ
    Graphics card(s)
    Intel HD Graphics 4400
    Sound Card
    Onboard HD Audio
    Monitor(s) Displays
    14"
    Screen Resolution
    1366 x 768
    Hard Drives
    1x SSD 240 GB
    1x HDD 500 GB
    PSU
    STOCK
    Cooling
    STOCK
    Mouse
    MULTILASER
    Keyboard
    MULTILASER
    Internet Speed
    600 MBPS
    Browser
    CHROME
    Antivirus
    AVAST PREMIUM
    Other Info
    DUAL-CORE SUCKS
In the 7-layer OSI model, Ethernet is in the second layer from the bottom, the Data Link Layer, so Windows as Operating System only controls it via network drivers > the answer thus resides in the pertinent IEEE standards on the Data Link Layer
After reading your post, I guess my conclusion may not be correct!!!
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    DELL Optiplex 380
    CPU
    Intel Core 2 Quad Q9550 @ 2.83 GHZ
    Motherboard
    DELL G41 0HN7XN
    Memory
    8 GB DDR3 1333 MHz
    Graphics Card(s)
    AMD RX 550 LEXA 4GB DX12 128-BIT
    Sound Card
    Onboard HD Audio
    Monitor(s) Displays
    AOC 32" 60 Hz
    Screen Resolution
    1920 x 1080
    Hard Drives
    1x SSD Hynix 1 TB (Windows 11)
    1x SSD Hynix 1 TB (Swap File / Recovery / System Backup)
    1x HDD Seagate Barracuda Green 4 TB (Main Storage)
    PSU
    DELL 345W
    Case
    DELL SFF
    Cooling
    DELL STOCK AIR COOLER
    Keyboard
    MULTILASER GAMER
    Mouse
    MULTILASER GAMER
    Internet Speed
    600 MBPS
    Browser
    EDGE/CHROME
    Antivirus
    AVAST PREMIUM
    Other Info
    OLD DELL RIGS ARE BRAVE
  • Operating System
    Windows 10
    Computer type
    Laptop
    Manufacturer/Model
    Samsung
    CPU
    Core i3 4005 1.7 GHZ
    Motherboard
    Unknown
    Memory
    8 GB DDR4 2133 MHZ
    Graphics card(s)
    Intel HD Graphics 4400
    Sound Card
    Onboard HD Audio
    Monitor(s) Displays
    14"
    Screen Resolution
    1366 x 768
    Hard Drives
    1x SSD 240 GB
    1x HDD 500 GB
    PSU
    STOCK
    Cooling
    STOCK
    Mouse
    MULTILASER
    Keyboard
    MULTILASER
    Internet Speed
    600 MBPS
    Browser
    CHROME
    Antivirus
    AVAST PREMIUM
    Other Info
    DUAL-CORE SUCKS
Multiple NICs is common when it comes to server platforms, assign each NIC an IP address and as an example you would have incoming (download) traffic through one NIC and sending traffic (upload) through the other, also not uncommon to have backup traffic through a third NIC.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
NOTE: The NIC Teaming feature is available only on Windows Server 2012 and later server operating systems. This feature is not available on Windows 10 or any other client operating systems. The NIC Teaming Windows PowerShell cmdlets are available on Windows 10 and other client operating systems to enable the management of NIC teams on remote computers that are running Windows Server 2016, Windows Server 2012, R2 and Windows Server 2012.

Note

For any Windows Client editions, these NetSwitchTeam cmdlets can be used only for remote management of the Hyper-V Extensible Switch that is running on Windows Server editions. Windows Client editions do not support running the Hyper-V Extensible Switch on the client itself.

In short, having two NICs installed in a Windows 11 PC causes all existing network connections to be closed by Windows 11 immediately the moment when Windows 11 decides to make the switch, from the NIC that it currently uses, to the other NIC. So, when two NICs are able to be used by it, it automatically chooses the NIC with the highest Connection Priority Order.
It also is why a Windows 11 PC equipped with both a wireless (WLAN) adapter and a LAN adapter cannot be connected via both at once. Windows 11 simply lacks the capacity to do so.
 

My Computers

System One System Two

  • OS
    11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Asus TUF Gaming (2024)
    CPU
    i7 13650HX
    Memory
    16GB DDR5
    Graphics Card(s)
    GeForce RTX 4060 Mobile
    Sound Card
    Eastern Electric MiniMax DAC Supreme; Emotiva UMC-200; Astell & Kern AK240
    Monitor(s) Displays
    Sony Bravia XR-55X90J
    Screen Resolution
    3840×2160
    Hard Drives
    512GB SSD internal
    37TB external
    PSU
    Li-ion
    Cooling
    2× Arc Flow Fans, 4× exhaust vents, 5× heatpipes
    Keyboard
    Logitech K800
    Mouse
    Logitech G402
    Internet Speed
    20Mbit/s up, 250Mbit/s down
    Browser
    FF
  • Operating System
    11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Medion S15450
    CPU
    i5 1135G7
    Memory
    16GB DDR4
    Graphics card(s)
    Intel Iris Xe
    Sound Card
    Eastern Electric MiniMax DAC Supreme; Emotiva UMC-200; Astell & Kern AK240
    Monitor(s) Displays
    Sony Bravia XR-55X90J
    Screen Resolution
    3840×2160
    Hard Drives
    2TB SSD internal
    37TB external
    PSU
    Li-ion
    Mouse
    Logitech G402
    Keyboard
    Logitech K800
    Internet Speed
    20Mbit/s up, 250Mbit/s down
    Browser
    FF
In short, having two NICs installed in a Windows 11 PC causes all existing network connections to be closed by Windows 11 immediately the moment when Windows 11 decides to make the switch, from the NIC that it currently uses, to the other NIC. So, when two NICs are able to be used by it, it automatically chooses the NIC with the highest Connection Priority Order.
Clearly this is false. I now have 5 systems all using multiple Ethernet adapters simultaneously. Yes, I can 100% guarantee that both adapters are in use simultaneously.

I can understand WiFi and Ethernet not coexisting because they are fundamentally different, but clearly multiple Ethernet adapters on the same subnet now work great.
 

My Computers

System One System Two

  • OS
    Win11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    1Gb Up / 1 Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Win11 Pro 23H2
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 13x Gen 2
    CPU
    Intel i7-1255U
    Memory
    16 GB
    Graphics card(s)
    Intel Iris Xe Graphics
    Sound Card
    Realtek® ALC3306-CG codec
    Monitor(s) Displays
    13.3-inch IPS Display
    Screen Resolution
    WQXGA (2560 x 1600)
    Hard Drives
    2 TB 4 x 4 NVMe SSD
    PSU
    USB-C / Thunderbolt 4 Power / Charging
    Mouse
    Buttonless Glass Precision Touchpad
    Keyboard
    Backlit, spill resistant keyboard
    Internet Speed
    1Gb Up / 1Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    WiFi 6e / Bluetooth 5.1 / Facial Recognition / Fingerprint Sensor / ToF (Time of Flight) Human Presence Sensor
In short, having two NICs installed in a Windows 11 PC causes all existing network connections to be closed by Windows 11 immediately the moment when Windows 11 decides to make the switch, from the NIC that it currently uses, to the other NIC. So, when two NICs are able to be used by it, it automatically chooses the NIC with the highest Connection Priority Order.
I don't think it works exactly this way because both adapters exhibit similar loads when there's intense network activity!!!

Edit: By the way, my problem went away after I disabled the "Power Saving" and "Wake-Up LAN" features for both adapters!!!
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    DELL Optiplex 380
    CPU
    Intel Core 2 Quad Q9550 @ 2.83 GHZ
    Motherboard
    DELL G41 0HN7XN
    Memory
    8 GB DDR3 1333 MHz
    Graphics Card(s)
    AMD RX 550 LEXA 4GB DX12 128-BIT
    Sound Card
    Onboard HD Audio
    Monitor(s) Displays
    AOC 32" 60 Hz
    Screen Resolution
    1920 x 1080
    Hard Drives
    1x SSD Hynix 1 TB (Windows 11)
    1x SSD Hynix 1 TB (Swap File / Recovery / System Backup)
    1x HDD Seagate Barracuda Green 4 TB (Main Storage)
    PSU
    DELL 345W
    Case
    DELL SFF
    Cooling
    DELL STOCK AIR COOLER
    Keyboard
    MULTILASER GAMER
    Mouse
    MULTILASER GAMER
    Internet Speed
    600 MBPS
    Browser
    EDGE/CHROME
    Antivirus
    AVAST PREMIUM
    Other Info
    OLD DELL RIGS ARE BRAVE
  • Operating System
    Windows 10
    Computer type
    Laptop
    Manufacturer/Model
    Samsung
    CPU
    Core i3 4005 1.7 GHZ
    Motherboard
    Unknown
    Memory
    8 GB DDR4 2133 MHZ
    Graphics card(s)
    Intel HD Graphics 4400
    Sound Card
    Onboard HD Audio
    Monitor(s) Displays
    14"
    Screen Resolution
    1366 x 768
    Hard Drives
    1x SSD 240 GB
    1x HDD 500 GB
    PSU
    STOCK
    Cooling
    STOCK
    Mouse
    MULTILASER
    Keyboard
    MULTILASER
    Internet Speed
    600 MBPS
    Browser
    CHROME
    Antivirus
    AVAST PREMIUM
    Other Info
    DUAL-CORE SUCKS
I've run 2 NICs from the same machine into a Network Switch -- with multiplexing and full duplex you should be able to increase traffic throughput to the target destination machine, You need decent Internet / LAN connection at home though -- any decent modern fibre system should be more than sufficient for typical domestic network traffic.A network switch is actually a good idea in any case - even a cheap unmamaged one -- costs around € 8 - 10 -- worth it -- that way you only need 1 wire to the router point from the switch !!

Cheers
jimbo
 

My Computer

System One

  • OS
    Windows XP,7,10,11 Linux Arch Linux
    Computer type
    PC/Desktop
    CPU
    2 X Intel i7
I had always been taught that you do not want to place 2 ethernet adapters in one machine

Hannes,

I had not thought it was possible.

Inspired by your post, I have just connected two USB-Ethernet adapters to my main computer and transferred several large files to it from another computer.
- I could see straight away that both were in use. They both continued to be used throughout the transfer.
- The fact that both report different speeds demonstrates that this is not some Windows confusion misreporting the same adapter twice.
- I did not do anything special, I just connected both Ethernet adapters and started the file transfer.
340+624.png - 303+436.png

I routinely transfer large files [10GB is commonplace & was used in this test] from that other computer to my main computer every morning.
I routinely have this second Ethernet adapter hanging around doing nothing so I'll start plugging it for the big transfer from now on.
Now I'll barely have time to make a pot of Earl Grey during the transfer.

Thank you so much for posting about your experiences.


All the best,
Denis
 

My Computer

System One

  • OS
    Windows 11 Home x64 Version 23H2 Build 22631.3447
Thank you so much for posting about your experiences.
And thank you for the comment. Remember though that this is only going to help where everything along the path supports the greater throughput. As an example...

The way I even discovered this was that I recently upgraded everything in my network from gigabit to 2.5 gigabit. But I have several mini PCs that have 2 separate gigabit Ethernet built-in. I connected both to same switch (a 2.5 gigabit switch) and was then able to transfer files between other machines much faster because I had 2 gigabit bandwidth to that mini PC. Note that if anything along the path between that mini PC was not only gigabit, then this would have limited me to only gigabit speed. But in my case, my switch is 2.5 gigabit and the machine I was sharing files with has a 2.5 gigabit adapter, so it dramatically helped me.
 

My Computers

System One System Two

  • OS
    Win11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    1Gb Up / 1 Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Win11 Pro 23H2
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 13x Gen 2
    CPU
    Intel i7-1255U
    Memory
    16 GB
    Graphics card(s)
    Intel Iris Xe Graphics
    Sound Card
    Realtek® ALC3306-CG codec
    Monitor(s) Displays
    13.3-inch IPS Display
    Screen Resolution
    WQXGA (2560 x 1600)
    Hard Drives
    2 TB 4 x 4 NVMe SSD
    PSU
    USB-C / Thunderbolt 4 Power / Charging
    Mouse
    Buttonless Glass Precision Touchpad
    Keyboard
    Backlit, spill resistant keyboard
    Internet Speed
    1Gb Up / 1Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    WiFi 6e / Bluetooth 5.1 / Facial Recognition / Fingerprint Sensor / ToF (Time of Flight) Human Presence Sensor
Understood.

Actually, I'm just making the best of some adapters & cables that I was given last year. I had previously been using WiFi [ax across the board] but even the single USB-Ethernet connection was almost ten times as fast***.
I did not measure the average transfer speed for this test. If I find the speed test records I made when I got the bits & pieces then I'll be able to do some sensible comparisons.

*** If I remember correctly, you found that your ax WiFi was as fast as your [single] Ethernet connection but my ax WiFi was nowhere near as fast as even a single Ethernet connection.


All the best,
Denis
 

My Computer

System One

  • OS
    Windows 11 Home x64 Version 23H2 Build 22631.3447
*** If I remember correctly, you found that your ax WiFi was as fast as your [single] Ethernet connection but my ax WiFi was nowhere near as fast as even a single Ethernet connection.
Yes, but there is a difference. Bear in mind that I am on WiFi 6e. So, I have not only the 2.4 and 5Ghz bands, but also the 6Ghz band.

Of course, I'm now starting to get the itch for WiFi 7 :-)
 

My Computers

System One System Two

  • OS
    Win11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    1Gb Up / 1 Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Win11 Pro 23H2
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 13x Gen 2
    CPU
    Intel i7-1255U
    Memory
    16 GB
    Graphics card(s)
    Intel Iris Xe Graphics
    Sound Card
    Realtek® ALC3306-CG codec
    Monitor(s) Displays
    13.3-inch IPS Display
    Screen Resolution
    WQXGA (2560 x 1600)
    Hard Drives
    2 TB 4 x 4 NVMe SSD
    PSU
    USB-C / Thunderbolt 4 Power / Charging
    Mouse
    Buttonless Glass Precision Touchpad
    Keyboard
    Backlit, spill resistant keyboard
    Internet Speed
    1Gb Up / 1Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    WiFi 6e / Bluetooth 5.1 / Facial Recognition / Fingerprint Sensor / ToF (Time of Flight) Human Presence Sensor
Clearly this is false. I now have 5 systems all using multiple Ethernet adapters simultaneously. Yes, I can 100% guarantee that both adapters are in use simultaneously.

I can understand WiFi and Ethernet not coexisting because they are fundamentally different, but clearly multiple Ethernet adapters on the same subnet now work great.
Have you actually measured (e.g. by using ROBOCOPY with the -MT option) the time it takes for a large file to be copied over the network with just a single NIC, and compared that to the time it takes for this same large file to be copied over this same network with NIC Teaming "enabled" on Windows 11 (all else having been kept equal during the comparison test)? Nothing is impossible of course, but AFAIK it usually doesn't take very long to figure out that combining two Gigabit Ethernet NICs in a single Windows 11 PC in this manner does not really give you more than the usual 1000 Mbps transfer speed after all. (I can't test this myself right now, as I only have one Realtek USB GbE Family Controller to work with.)
 

My Computers

System One System Two

  • OS
    11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Asus TUF Gaming (2024)
    CPU
    i7 13650HX
    Memory
    16GB DDR5
    Graphics Card(s)
    GeForce RTX 4060 Mobile
    Sound Card
    Eastern Electric MiniMax DAC Supreme; Emotiva UMC-200; Astell & Kern AK240
    Monitor(s) Displays
    Sony Bravia XR-55X90J
    Screen Resolution
    3840×2160
    Hard Drives
    512GB SSD internal
    37TB external
    PSU
    Li-ion
    Cooling
    2× Arc Flow Fans, 4× exhaust vents, 5× heatpipes
    Keyboard
    Logitech K800
    Mouse
    Logitech G402
    Internet Speed
    20Mbit/s up, 250Mbit/s down
    Browser
    FF
  • Operating System
    11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Medion S15450
    CPU
    i5 1135G7
    Memory
    16GB DDR4
    Graphics card(s)
    Intel Iris Xe
    Sound Card
    Eastern Electric MiniMax DAC Supreme; Emotiva UMC-200; Astell & Kern AK240
    Monitor(s) Displays
    Sony Bravia XR-55X90J
    Screen Resolution
    3840×2160
    Hard Drives
    2TB SSD internal
    37TB external
    PSU
    Li-ion
    Mouse
    Logitech G402
    Keyboard
    Logitech K800
    Internet Speed
    20Mbit/s up, 250Mbit/s down
    Browser
    FF
but my ax WiFi was nowhere near as fast as even a single Ethernet connection
With my Asus RT-AX92U 2-Pack using WiFi 6 (AX6100) with the 160MHz option set to enabled, I am getting pretty close to Gigabit Ethernet speeds as long as the WiFi signal is kept close enough to its maximum strength. In practice, it easily averages around the 960 Mbps mark. This is with an Intel AX200 card in a desktop PC and two different laptops each one of which has an Intel AX201 card inside.
 

My Computers

System One System Two

  • OS
    11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Asus TUF Gaming (2024)
    CPU
    i7 13650HX
    Memory
    16GB DDR5
    Graphics Card(s)
    GeForce RTX 4060 Mobile
    Sound Card
    Eastern Electric MiniMax DAC Supreme; Emotiva UMC-200; Astell & Kern AK240
    Monitor(s) Displays
    Sony Bravia XR-55X90J
    Screen Resolution
    3840×2160
    Hard Drives
    512GB SSD internal
    37TB external
    PSU
    Li-ion
    Cooling
    2× Arc Flow Fans, 4× exhaust vents, 5× heatpipes
    Keyboard
    Logitech K800
    Mouse
    Logitech G402
    Internet Speed
    20Mbit/s up, 250Mbit/s down
    Browser
    FF
  • Operating System
    11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Medion S15450
    CPU
    i5 1135G7
    Memory
    16GB DDR4
    Graphics card(s)
    Intel Iris Xe
    Sound Card
    Eastern Electric MiniMax DAC Supreme; Emotiva UMC-200; Astell & Kern AK240
    Monitor(s) Displays
    Sony Bravia XR-55X90J
    Screen Resolution
    3840×2160
    Hard Drives
    2TB SSD internal
    37TB external
    PSU
    Li-ion
    Mouse
    Logitech G402
    Keyboard
    Logitech K800
    Internet Speed
    20Mbit/s up, 250Mbit/s down
    Browser
    FF
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