Monitor Refresh Rate vs. Connection Type Question


mccmw

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Last Fall, I purchased a cheap 100Hz QHD monitor to get me by until I build a new system next year (old 60Hz FHD monitor was failing after 7+ years). I had it connected via HDMI and it ran fine at first at 100Hz...but started randomly going to "sleep" even when Power setting was different. I did a lot of troubleshooting...different cable, reinstalled video card drivers, and even investigated whether an adjacent USB hub might be causing interference. I then tried putting the monitor at 60Hz and it seemed to work. I ended up just buying/trying a DP cable and it has been fine again at 100Hz.

What are the current limits of HDMI (2.0/2.1) for resolution and refresh rate for monitors...not TVs. Admittedly, while I know the HDMI cables I tried were rated for up to 8K, I suspect the port(s) on the monitor may not have been. For the future...is DisplayPort recommended over HDMI for high resolution and refresh rate monitors?
 

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    CPU
    Intel i7-7700K
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    Windows 11 Homei9-11900H32GBIntegrated Intel and Nvidia 3050Ti
    Operating System
    Windows 11 Home
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    Laptop
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    Dell/XPS 15 9510
    CPU
    i9-11900H
    Motherboard
    Unknown
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    32GB
    Graphics card(s)
    Integrated Intel and Nvidia 3050Ti
    Sound Card
    Integrated (Realtek)
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    None
    Screen Resolution
    1920 x 1200 (non-Touch)
    Hard Drives
    2TB SK Hynix P41 Platinum
    Antivirus
    Windows Security

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AMD Ryzen 5 8600G (07/24)
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ASROCK B650M-HDV/M.2 (07/24) BIOS 4.21 AGESA ComboAM5 1.3.0.1 (04/26)
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24" Philips 24M1N3200ZS/00 (05/24)
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View attachment 173030

Thanks...that is what I thought. It should've worked. Maybe because it is a cheap monitor I guess. I assume they are probably HDMI 2.0 ports and 100Hz was "too close" to 119Hz and wasn't achieving full performance. For now, I'll plan to stick to HDMI on my home entertainment devices and DP on my PCs. Granted HDMI 2.2 looks like a significant upgrade.
 

My Computers My Computers

  • At a glance

    Windows 11Intel i7-7700K32GB 2666Mhz (Kingston Hyper X Fury)Asus Nvidia 1050Ti
    OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom
    CPU
    Intel i7-7700K
    Motherboard
    Asus Prime Z-270A
    Memory
    32GB 2666Mhz (Kingston Hyper X Fury)
    Graphics Card(s)
    Asus Nvidia 1050Ti
    Sound Card
    N/A
    Monitor(s) Displays
    Samsung C27F390
    Screen Resolution
    1920 x 1080
    Hard Drives
    1TB Western Digital SN770 (System) and 2TB Western Digital SN770 (Storage)
    Antivirus
    Windows Security
  • At a glance

    Windows 11 Homei9-11900H32GBIntegrated Intel and Nvidia 3050Ti
    Operating System
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Dell/XPS 15 9510
    CPU
    i9-11900H
    Motherboard
    Unknown
    Memory
    32GB
    Graphics card(s)
    Integrated Intel and Nvidia 3050Ti
    Sound Card
    Integrated (Realtek)
    Monitor(s) Displays
    None
    Screen Resolution
    1920 x 1200 (non-Touch)
    Hard Drives
    2TB SK Hynix P41 Platinum
    Antivirus
    Windows Security
There can be hardware GPU (PCIe) and software limitations: BIOS, chipset and GPU driver version.
Your GPU seems to support HDMI 2.0 only and no more drivers, so a better cable will not help.
 

My Computer My Computer

At a glance

Home26H2CanAMD Ryzen 5 8600G (07/24)2x32GB Kingston FURY DDR5 5600 MHz CL36 @5200...ASROCK Radeon RX 6600 Challenger D 8G @48FPS ...
OS
Home26H2Can
Computer type
PC/Desktop
CPU
AMD Ryzen 5 8600G (07/24)
Motherboard
ASROCK B650M-HDV/M.2 (07/24) BIOS 4.21 AGESA ComboAM5 1.3.0.1 (04/26)
Memory
2x32GB Kingston FURY DDR5 5600 MHz CL36 @5200 CL36 (07/24)
Graphics Card(s)
ASROCK Radeon RX 6600 Challenger D 8G @48FPS (08/24)
Sound Card
Creative Sound BlasterX AE-5 Plus (05/24)
Monitor(s) Displays
24" Philips 24M1N3200ZS/00 (05/24)
Screen Resolution
1920×1080@165Hz via DP1.4
Hard Drives
Kingston KC3000 NVMe 2TB (05/24)
ADATA XPG GAMMIX S11 Pro 512GB (07/19)
PSU
Seasonic Core GM 550 Gold (04/24)
Case
Fractal Design Define 7 Mini with 3x Noctua NF-P14s/12@555rpm (04/24)
Cooling
Noctua NH-U12S with Noctua NF-P12 (04/24)
Keyboard
HP Pavilion Wired Keyboard 300 (07/24) + Rabalux 76017 Parker (01/24)
Mouse
Logitech M330 Silent Plus (01/26)
Internet Speed
500/100 Mbps via RouterOS (05/21) & TCP Optimizer
Browser
Edge, Brave for YouTube, LibreWolf for FB
Antivirus
NextDNS blocking 1/3 Traffic
Other Info
Phone: Motorola Moto G86 (02/26)
Backup: Hasleo Backup Suite (PreOS)
Headphones: Sennheiser RS170 (09/10)
Chair: Huzaro Force 4.4 Grey Mesh (05/24)
Notifier: Xiaomi Mi Band 9 Milanese (10/24)
FlexCore USB-C 3.2 Gen 1 (M) to LAN (F) (08/25)
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