How to connect a motherboard, not.


tinmar49

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I swapped over two motherboards between tower cases, both W11. Just the motherboards and everything directly connected, processor and ram. The first powered up exactly as expected, but the second did not. I had connected the boards accordingly to the printing on the board surface because I have mislaid the manuals. I suspected the switching leads and it turned out that I had misread the logos and connected the power switch, power leds, hdd leds and reset switch to a USB header adjacent to the correct one. The pin count was identical, including the blank space. I was relieved when the pc booted normally after re positioning the connectors.
 

My Computers

System One System Two

  • OS
    W11 pro beta
    Computer type
    PC/Desktop
    Manufacturer/Model
    home built
    CPU
    Athlon 3000G
    Motherboard
    Asrock A320M-HDV r4.0
    Memory
    16Gb Crucial DDR4 2400
    Graphics Card(s)
    onboard cpu
    Sound Card
    onboard
    Monitor(s) Displays
    AOC 27
    Screen Resolution
    2560-1440
    Hard Drives
    WD black SN750 M2 500Gb
    PSU
    500W Seasonic core 80+gold non modular
    Case
    Fractal Design Define R2
    Cooling
    front 2 x 120mm rear 100mm stock psu
    Internet Speed
    135/20
    Browser
    Firefox and edge
    Antivirus
    Windows Security and free Malwarebytes
  • Operating System
    W11 pro 64 beta (from W10 pro system builder pack)
    Computer type
    PC/Desktop
    Manufacturer/Model
    homebuilt
    CPU
    Ryzen 7 5700G
    Motherboard
    MSI B450 tomahawk max II
    Memory
    4 x 8Gb Corsair Vengeance LPX 3000 DDR4
    Graphics card(s)
    onboard cpu
    Sound Card
    motherboard
    Monitor(s) Displays
    LG 21.5" IPS
    Screen Resolution
    1920 x 1080
    Hard Drives
    WD 1Tb Black M2 SN850X on Asus hyper M2 X16 max V2 card
    PSU
    Be Quiet 400 semi modular 80+gold
    Case
    Coolermaster Silencio 650
    Cooling
    140mm front, 120 rear Akasa Vegas Chroma AM
    Internet Speed
    135/20
    Browser
    edge/Firefox
    Antivirus
    WD plus Malwarebytes free
I have mislaid the manuals. I suspected the switching leads and it turned out that I had misread the logos and connected the power switch, power leds, hdd leds and reset switch to a USB header adjacent to the correct one. The pin count was identical, including the blank space. I was relieved when the pc booted normally after re positioning the connectors.
Two identical connectors wiith completely different functions, that's really bad design.
Lucky no apparent damage was done. Have you checked the USB still works?

Replacements for mislaid manuals can usually be found as pdfs downloaded from the manufacturer.
 

My Computers

System One System Two

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Acer Aspire 3 A315-23
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB Samsung EVO 870 SSD
    Internet Speed
    50 Mbps
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October. Windows Update offered the 22H2 Feature Update on 20th September 2022. It got the 23H2 Feature Update on 4th November 2023 through Windows Update.

    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, supported device running Windows 11 Pro (and all my Hyper-V VMs).

    My SYSTEM FOUR is a 2-in-1 convertible Lenovo Yoga 11e 20DA, Celeron N2930, 8GB RAM, 256GB ssd. Unsupported device: currently running Win10 Pro, plus Win11 Pro RTM and Insider Beta as native boot vhdx.

    My SYSTEM FIVE is a Dell Latitude 3190 2-in-1, Pentium Silver N5030, 4GB RAM, 512GB NVMe ssd, supported device running Windows 11 Pro, plus the Insider Beta, Dev, and Canary builds as a native boot .vhdx.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Lattitude E4310
    CPU
    Intel® Core™ i5-520M
    Motherboard
    0T6M8G
    Memory
    8GB
    Graphics card(s)
    (integrated graphics) Intel HD Graphics
    Screen Resolution
    1366x768
    Hard Drives
    500GB Crucial MX500 SSD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround. In-place upgrade to 22H2 using ISO and a workaround. Feature Update to 23H2 by manually installing the Enablement Package. Also running Insider Beta, Dev, and Canary builds as a native boot .vhdx.

    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, supported device running Windows 11 Pro (and all my Hyper-V VMs).

    My SYSTEM FOUR is a 2-in-1 convertible Lenovo Yoga 11e 20DA, Celeron N2930, 8GB RAM, 256GB ssd. Unsupported device: currently running Win10 Pro, plus Win11 Pro RTM and Insider Beta as native boot vhdx.

    My SYSTEM FIVE is a Dell Latitude 3190 2-in-1, Pentium Silver N5030, 4GB RAM, 512GB NVMe ssd, supported device running Windows 11 Pro, plus the Insider Beta, Dev, and Canary builds as a native boot .vhdx.
Two identical connectors wiith completely different functions, that's really bad design.
Lucky no apparent damage was done. Have you checked the USB still works?

Replacements for mislaid manuals can usually be found as pdfs downloaded from the manufacturer.
I think the pinouts are pretty much standard.

Pinouts for the B450M PRO-VDH:

USB header:

usb.jpg

Front panel header:

front_panel.jpg

They're not identical. They are mirror images mechanically. However, if the front panel connections are like most cases I've owned, the cabling isn't to a single plug, but to individual one or two pin connectors for the individual functions. Easy to connect to a USB header if the pin spacings are the same. A USB case connector couldn't be plugged into the front panel header.

I'm not sure what connections the OP made to the USB header, but I hope that no harm was done. If it had been me, it would have been a disaster.
 

My Computers

System One System Two

  • OS
    Windows 11 22631.2861
    Computer type
    PC/Desktop
    Manufacturer/Model
    homebuilt
    CPU
    Amd Threadripper 7970X
    Motherboard
    Gigabyte TRX50 Aero D
    Memory
    128GB (4 X 32) Kingston DDR5 5200 (RDIMM)
    Graphics Card(s)
    Gigabyte RTX 4090 OC
    Sound Card
    none (USB to speakers), Realtek
    Monitor(s) Displays
    Philips 27E1N8900 OLED
    Screen Resolution
    3840 X 2160 @ 60Hz
    Hard Drives
    Crucial T700 2TB M.2 NVME SSD
    WD 4TB Blue SATA SSD
    Seagate 18TB IronWolf Pro
    PSU
    eVGA SuperNOVA 1600 GT
    Case
    Lian Li 011 Dynamic Evo XL
    Cooling
    Alphacool Eisbaer Pro Aurora 360, with 3 Phanteks T30 fans
    Keyboard
    Logitech K120 (wired)
    Mouse
    Logitech M500s (wired)
    Internet Speed
    1200 Mbps
  • Operating System
    windows 11 22631.2861
    Computer type
    PC/Desktop
    Manufacturer/Model
    homebuilt
    CPU
    Intel I9-13900K
    Motherboard
    Asus RoG Strix Z690-E
    Memory
    64GB G.Skill DDR5-6000
    Graphics card(s)
    Gigabyte RTX 3090 ti
    Sound Card
    built in Realtek
    Monitor(s) Displays
    Asus PA329C
    Screen Resolution
    3840 X 2160 @60Hz
    Hard Drives
    WDC SN850 1TB
    8 TB Seagate Ironwolf
    4TB Seagate Ironwolf
    PSU
    eVGA SuperNOVA 1300 GT
    Case
    Lian Li 011 Dynamic Evo
    Cooling
    Corsair iCUE H150i ELITE CAPELLIX Liquid CPU Cooler
    Mouse
    Logitech M500s (wired)
    Keyboard
    Logitech K120 (wired)
I recall on an older Asus motherboard having the System Panel connector bunched in with USB, etc. so I could see having confusion without a manual. The last two Asus boards I built with, Z170 Pro and Z590 A Gaming, both System Panel connectors are off by themselves in one corner of the board. Good design I think by Asus.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Wordsworth 10000
    CPU
    Core i7 10700K 3.8 GHz
    Motherboard
    Asus ROG Strix Z590-A Gaming Wifi
    Memory
    Corsair Vengeance LPX DDR4 64GB 3000MHz
    Graphics Card(s)
    Asus Radeon RX480 Strix 8GB
    Sound Card
    Asus Xonar DSX
    Monitor(s) Displays
    HP 2709m
    Screen Resolution
    1920x1080
    Hard Drives
    Samsung 980 Pro M.2 SSD 500GB; Samsung 980 M.2 SSD 1TB
    PSU
    Thermaltake Toughpower Grand Platinum 850W
    Case
    Fractal Design Meshify 2
    Cooling
    CPU-Noctua NH D15 Chromax, GPU-Stock, Case-Noctua Chromax 3x140
    Keyboard
    Microsoft Natural Ergo 4000
    Mouse
    HP X500
    Internet Speed
    Cable
    Browser
    Vivaldi, MS Edge
    Antivirus
    Malwarebytes 4.4.3, Windows Defender
    Other Info
    Klipsch Promedia 5.1 THX
    Asus External Blu-Ray 16D1X-USB 3.0
  • Operating System
    Windows 11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Wordsworth 6000
    CPU
    Core i7 6700K 4.0 GHz
    Motherboard
    Asus Z170 Pro
    Memory
    Corsair Vengeance LPX DDR4 32GB 3000MHz
    Graphics card(s)
    Asus GeForce GTX 1050 Ti
    Sound Card
    Asus Xonar SE
    Monitor(s) Displays
    HP X24ih
    Screen Resolution
    1920x1080
    Hard Drives
    Intel 760p M.2 SSD 500GB; Intel 540 SSD 480GB; Intel 335 SSD 240GB
    PSU
    Thermaltake Toughpower GF1 750W
    Case
    Lian Li PC-B70
    Cooling
    CPU- Noctua NH-D15; GPU-Stock; Case-Noctua Chromax 2x140, 2x120
    Mouse
    Microsoft Wireless Comfort 5050
    Keyboard
    Microsoft Wireless Comfort 5050
    Internet Speed
    Cable
    Browser
    Vivaldi, MS Edge
    Antivirus
    Malwarebytes 4.4.3, Windows Defender
    Other Info
    HP bd 340
    HP bd 240
    Denon DRA-800H
    Klipsch RP-600M
    Klipsch R-100SW (2)

    System 3 Specs
    Core i7 10700K 3.8 GHz
    Asus ROG Strix Z590-A Gaming Wifi
    Corsair Vengeance LPX DDR4 32GB 3200MHz
    Asus Radeon RX560 Dual 4GB
    Xonar SE
    Samsung 980 Pro M.2 SSD 1 TB (2)
    Thermaltake Toughpower GF3 850W
    Fractal Design Meshify 2
    CPU-Noctua NH D15 Chromax, GPU-Stock, Case-Noctua Chromax 2x140,1x120
You are right, they must be mirror images. I have not tried the USB header as all the USB cabling for that case had already been accounted for. It is unlikely that any damage had been done although I had connected 6 and 8, USB+ to ground.
The object of the exercise was to put the higher spec innards in the higher spec case.
 

My Computers

System One System Two

  • OS
    W11 pro beta
    Computer type
    PC/Desktop
    Manufacturer/Model
    home built
    CPU
    Athlon 3000G
    Motherboard
    Asrock A320M-HDV r4.0
    Memory
    16Gb Crucial DDR4 2400
    Graphics Card(s)
    onboard cpu
    Sound Card
    onboard
    Monitor(s) Displays
    AOC 27
    Screen Resolution
    2560-1440
    Hard Drives
    WD black SN750 M2 500Gb
    PSU
    500W Seasonic core 80+gold non modular
    Case
    Fractal Design Define R2
    Cooling
    front 2 x 120mm rear 100mm stock psu
    Internet Speed
    135/20
    Browser
    Firefox and edge
    Antivirus
    Windows Security and free Malwarebytes
  • Operating System
    W11 pro 64 beta (from W10 pro system builder pack)
    Computer type
    PC/Desktop
    Manufacturer/Model
    homebuilt
    CPU
    Ryzen 7 5700G
    Motherboard
    MSI B450 tomahawk max II
    Memory
    4 x 8Gb Corsair Vengeance LPX 3000 DDR4
    Graphics card(s)
    onboard cpu
    Sound Card
    motherboard
    Monitor(s) Displays
    LG 21.5" IPS
    Screen Resolution
    1920 x 1080
    Hard Drives
    WD 1Tb Black M2 SN850X on Asus hyper M2 X16 max V2 card
    PSU
    Be Quiet 400 semi modular 80+gold
    Case
    Coolermaster Silencio 650
    Cooling
    140mm front, 120 rear Akasa Vegas Chroma AM
    Internet Speed
    135/20
    Browser
    edge/Firefox
    Antivirus
    WD plus Malwarebytes free
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