3090fe, displayport flickers but never hdmi

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Roflcopter_Down

[H]ard|Gawd
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Jan 7, 2008
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Hi, odd predicament here.
I have an unmodded 3090fe in my gaming rig. When I'm not using it, it's mining. After rebooting, if I mine at all, the Displayport monitor might randomly start flickering, like black screen for 1 second every 20-600 seconds. Very random. Sometimes there is no screen flicker for days. Sometimes frequent enough I have to reboot so it goes away for awhile. I bought another Displayport cable (Cable Matters VESA Certified 8K DisplayPort Cable 1.4) and the problem completely went away for weeks but it has started to return and more frequently. DP is hooked up to a cheap Dell 4k 60hz monitor. HDMI is hooked up to 4k 120hz LG C1, which never has issue. If I hook up HDMI to the Dell monitor, there is no issue. Unfortunately the 3090 FE only has one HDMI port :)
How could mining cause this specific problem? I should replace the pads on this 3090 but I dont know if that would cause this issue. Why would HDMI have no issue?
 
Roflcopter_Down said:
Hi, odd predicament here.
I have an unmodded 3090fe in my gaming rig. When I'm not using it, it's mining. After rebooting, if I mine at all, the Displayport monitor might randomly start flickering, like black screen for 1 second every 20-600 seconds. Very random. Sometimes there is no screen flicker for days. Sometimes frequent enough I have to reboot so it goes away for awhile. I bought another Displayport cable (Cable Matters VESA Certified 8K DisplayPort Cable 1.4) and the problem completely went away for weeks but it has started to return and more frequently. DP is hooked up to a cheap Dell 4k 60hz monitor. HDMI is hooked up to 4k 120hz LG C1, which never has issue. If I hook up HDMI to the Dell monitor, there is no issue. Unfortunately the 3090 FE only has one HDMI port :)
How could mining cause this specific problem? I should replace the pads on this 3090 but I dont know if that would cause this issue. Why would HDMI have no issue?
Click to expand...
Replacing pads will probably do nothing for this problem. So what if you don't mine at all, does the issue still show up?
 
I've had this issue with a particular monitor, G7 Oddysey, updating firmware helped... might just be firmware on the monitor, could be your cable
 
All DP outputs.
I will reboot and stop mining for 48 hours to see if it occurs. Eth is chillin so might as well try now.
I'll try to update monitor fw, it is the cheapest 4k monitor from Dell, I paid like $180 in dell bucks lol. It is odd that a new cable no doubt made a difference though.
 
Had this issue happen recently on my 1080ti with an older 2k Acer Predator 144hz monitor. After much troubleshooting it ended up being that one DP input on the monitor. You've done the cable, try driver and firmware next, but don't be afraid to buy another monitor. Just buy it from someplace that provides a return policy that you can use to your benefit if that isn't it.
 
It could just be the screen. I have a Dell P4317Q 43" 4k screen that's almost two years old (aka not a cheap one) that occasionally glitches using a DP connection. I don't know if HDMI would be better. The glitch I get is similar to yours, but much less often. I get a blank screen for like 1s occasionally. Strangely it seems to not happen when gaming, but I'm not entirely sure about that since it's more of a once a week sort of thing and I use it all day every day (well, weekdays) for my programming job. I'm pretty sure it's the monitor since it's done it while attached to a 3090, a 1660Ti, and the Intel Integrated video in my work issued laptop. I suppose I could try different cables too. I'm pretty sure I'm using the ones that came with it.
 
Try a different monitor over DP. Only troubleshooting step you haven't tried. It's either the monitor, cables are burning out, or the GPU.

How long is the DP cable BTW? If it's longer then 6 feet I wouldn't trust it.
 
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