Hello all, this is my first post here and just want to say I'd appreciate any help regarding to a weird problem I have been having.  Currently, since I got my new card (3080 FTW3 Ultra) a couple days ago, I noticed that on occasion my screen will randomly go black or blank for a split second.  Sometimes it happens just once, sometimes it happens a few times back to back with a second or so in between, and there doesn't seem to be too much of a cause on why it happens.
 
I've first noticed, and notice it the most, just being at the desktop using Chrome or whatever.  It has happened in games, but it seems to not matter if I am playing a game or not.  I am using an LG 32GK850G monitor which is a G-Sync monitor (not G-Sync compatible, but full).  At first, I suspected that the black/blank screen happening had something to do with G-Sync (and it still might) as it has a similar effect when turning on/off G-Sync in the NV control panel.  However, it still can happen with or without G-Sync being turned on, so I am not sure it is really the issue.
 
Currently, I have tried using DDU and doing a clean install of the drivers, I have tried both Game Ready and Studio drivers, and I tried turning on and off G-Sync.  I have not tried a different monitor yet as I only have another G-Sync monitor to test with, however I will try my TV later that doesn't have G-Sync.  I also have not tried a new DisplayPort cable yet as I don't have one readily available and it doesn't seem like it is a cable issue but 3 days ago I never saw this problem before on the exact same setup and monitor.  I'm running an 850 watt EVGA Supernova that is a few years old with three VGA power cables into the card.  I have tried both OC and normal bios switch modes and it happens in both.  The card doesn't seem to care about the clock speeds as it has happened with 0% GPU utilization at 210 MHz clock speed, and seemingly much higher GPU clock speed while in games.
 
I can't say for certain if this is a card problem because I've messed with OCing the past couple of days and ran all kinds of benchmarks and stress tests and games without any crashes or artifacting whatsoever.  From that perspective, the card has been great and running as it should.  The only issue is this random blank screen that happens occasionally with almost no telling when it will happen again.  It can happen a few times in a few minutes, or go for hours without having seeing it.  To that, it is really hard to test and verify if any changes is working properly because of how irreproducible the problem is currently.
 
Again, I appreciate if anyone has some answers or at least something to help point me in the right direction to helping with the problem.  Currently, I find it less likely that it is a hardware/card issue as this is the only problem with it and otherwise has been running great.  I also can't tell if it is a driver issue because NVidia supposedly fixed some flickering and G-Sync issues in the most recent driver updates.  I tried asking around on the Nvidia reddit and someone suggested other people with the FTW3 Ultra card saw similar problems.  I couldn't really find anything on here or the internet to help with much of anything, so I appreciate it if anyone here has something to say about it.  Thanks!

Knowing your computer specs always helps. 
 
G-Sync monitors are especially hard hit with problems with the 30 series. Some black screen problems have been resolved by recent driver fixes, others have been resolved by firmware updates to the monitor/TV, and yet others have been fixed by a new, certified DP cable. If turning off G-Sync fixes the black screen happening, a driver fix or a new DP cable is in order.

Try a new DP cable.

There's also a new OSD control software listed on the LG site (Sep. 25th) - not sure what it does, but maybe it will help as well: https://www.lg.com/us/sup...duct/lg-32GK850G-B.AUS
 

im currently having the same issue.  All displays connected to 3080 xc3 go black for a minute or 2 and then an event view error prompts:
 
Faulting application name: wallpaper32.exe, version: 1.0.0.0, time stamp: 0x5f611cfd
Faulting module name: d3d11.dll, version: 10.0.19041.546, time stamp: 0x44e07052
Exception code: 0xc0000005
Fault offset: 0x0011d1e6
Faulting process id: 0x33e0
Faulting application start time: 0x01d6b218da20814b
Faulting application path: H:\steam\steamapps\common\wallpaper_engine\wallpaper32.exe
Faulting module path: C:\WINDOWS\SYSTEM32\d3d11.dll
Report Id: 45345a43-7be0-4a7b-8cc0-954c5b3f5625
Faulting package full name:
Faulting package-relative application ID:

I actually made a post about it here yesterday.
Try the following:
-Open Nvidia Control Panel and enable Debug mode under the Help tab.
-Open Nvidia Control Panel, go to Manage 3D settings, under Global Settings enable "Prefer maximum performance" in Power management mode.
 
It solved the black screen issues for me.

Hey did you end up solving this as I have the exact same issue with the exact same card...

milkman76
Ive been seeing this as well. 
 
1080ti I just swapped out did not cause brief black screen. 30 year custom builder, sysadmin here. 
As soon as I installed the 3080 and resolved the PSU issues.... that NVIDIA and EVGA blame on PSU makers, who in turn blame GPU makers, I started testing the card in games. I notice about maybe once an hour, twice an hour, the screen will blink and go black for about 1/4 of a second. 
 
I dont use Gsync or Freesync and do not have a monitor with it. Im on a BenQ 32" PD3200U. The flashing occurs with vsync on or off, in any game, as far as I can tell so far. The issue is minor and not a "show stopping" issue, but it is present and annoying, and if I am in an intense moment of a game, it can interrupt me. 
ASrock x299 taichi. 
I7 7800x
32GB DDR4
3080FTW3
SSDs, etc. 
All stock, no overclocking, all updated drivers, latest BIOS (non-resizable BAR) on everything. 
 
EDIT: oh -- forgot to mention, swapped DP ports and cables. Same issue. 1080ti and nvidia 960 on other systems dont cause this on the same monitor. 
 

Might pay to have another look at the cables as that was what my issue turned out to be. I had a HDMI 2.0b cable expensive quality one and was doing the issue even when it was on res and settings that 2.0b should be able  to handle. Turns out around 99 percent of high end hdmi cables are not certified. Ended up finding the only certified 2.1 in australia and it works PERFECTLY. sounds like you are using DP so might not be relevant to you but i really have to wonder if DP cables have the same issues. 

Well i don't really know about DP but for HDMI yes the card does. And testing on another device is no good you need certified cables that are verifed by the app.

Have you found a fix? I had a similar problem with my 3090, but after the latest nvidia drivers (465.89), I never had the issue again (no more random black screens).