I have the same issue. Seems to crash whenever I'm watching twitch/youtube, and never when I'm playing video games.
 
Edit: I'm using RTX 3090 FTW3

I'm getting crashes on my 3090 FTW Ultra from both old and new drivers(457.51). Sometimes it will just blank out both monitors and go to no signal for a few seconds, and eventually come back. However, once or twice a day it will blank out both monitors and then randomly restart my PC. 1080ti never did this. Oof.

I'm on a replacement card (had to RMA the first) and this is happening on the new one.

Interestingly enough, judging by serial numbers, the replacement card is likely from the same batch as the faulty first card (there was only ~50 digits difference in the serial numbers).

I'm wondering if all of us having these issues, and our replacements for those who have already RMA'd are all from the same batch.

Just to add to the information-pile... I was having random black screen flashes since I updated my computer last month... From a 3rd Generation i5 to a 10th Gen i9, new everything including monitor, but for my old GF-760 video card... Everything was fine before the upgrade and only started getting the flashes after upgrading.
 
A few days ago I was in the nvidia control panel and switched to "Prefer maximum performance" which is where I normally had it but forgot to switch back after upgrading the system.

No black-flash screens since.

Just add here. Both cards dead 3090ftw3 ultra. This is pure cancer. Im running 2080ti now. Just had second 3090ftw3 to do same.
 
Edit: My mistake i returned same card into system. Second one is running fine. But still so frustrating. I lost entire day into this 
Edit2: Both cards working there is a bug with game R6 in operator screen that cause black screen (only on that screen fans stop spinning and coil whine is insane)(my gpus crashed cos of overheat). I already posted here and on new post. 

Get CRU. CRU comes with a display settings reset exe. It helped, is quick, and doesn't require a restart. And I feel like I've had this problem with evga cards and displayport on second monitors. I am convinced it is a power issue overall; it doesn't happen with one screen, but with 2/3 + vr, it happens.

felicityc
Get CRU. CRU comes with a display settings reset exe. It helped, is quick, and doesn't require a restart. And I feel like I've had this problem with evga cards and displayport on second monitors. I am convinced it is a power issue overall; it doesn't happen with one screen, but with 2/3 + vr, it happens.

Nope, i have a single 4K60 display on it, and it does happen. Only thing helped for me was also setting prefer max performance in the driver, so that the card does not downclock in idle.
Not sure about 457.51 tough, i am still on prefer max performance now.

The PX1 software... i mean, it could be. I am using it too.
What speaks against this theory, that i see a lot of other complaints of the same issue, but other brand cards. For example reddit, or nvidia forums. I dont think they all use PX1.
 

I just tried siege with Vsync disabled. Operator Menu has 999+ FPS so this is pretty normal... My card diod not have any coil whine tho. 3090FTW3

I can confirm the latest patch didn't fix this issue. EVGA RTX 3090 FTW3 Ultra here. So upsetting knowing such an expensive card is having this problem. Still no statement from EVGA?

I tried everything i follow each event in events viewer.
The problem occurred every hour or less.
I accepted the issue at least it happens just 1 or twice every hour.
Btw in the event viewer i dont get nvidia driver fail just random fails.

This happened to my Rtx 3090. Turns out the card was dieng. It just black screened for a few weeks then BAM dead. Fans wouldn’t turn on or anything

mine just died as well 20 mins ago (3090 ftw3 ultra).  First, it was losing signal to the monitor / tv and nothing would recover it except for a restart. This happened 8-10 times over the last week or two. Tonight, i attempted to restart and have no signal, fan movement, or rgb.  just one single red led near the power connectors ( was using 3 individual cables for power just to note).
 
tried a different PCI slot- no luck.  checked all plugs- no luck.  just stuck in an old 1080ti ftw3 hybrid and works just fine.  just sent a service ticket.
 
for reference: classified k z-379 motherboard, 8700k, evga 1000w power supply, and card was not overclocked. always ran the bios switch in the normal position.

I had the same problem with my RTX 3080 on the previous NVIDIA driver where the GPU would crash and restart my pc only during idle, surfing the web, or watching a youtube videos. After update to the newly released driver using clean uninstall driver using Display Driver Uninstaller (DDU)(also disable internet before the DDU process is very crucial I did this same process without disabling my internet the crashing problem persist)(windows tend to automatically install older NVIDIA drivers that you don't want when your computer restart after DDU uninstall process), it seems to fix the problem so far no crash for a couple of days. You should download the latest NVIDIA driver to a folder first Since the NVIDIA team address this issue and seem to attempt to fix it with this new Driver.
First, you should disable your internet then enter Safe Mode and use DDU to uninstall the driver once your computer restart makes sure the internet still disable then install the NVIDIA driver that you downloaded after installation finish then you can enable your internet again. Hopefully, this will fix your crash problem good luck! Also, there was a fix by switching from optimal power in NVIDIA control panel to maximum performance but after what I did above seems like the crash gone even on optimal power.

Just wanted to chime in as I am having the same issues with the 3090 XC3 Ultra, I set my TDR delay to 8 seconds as per EVGA tech support advice, and still experienced crashed. I am now testing it at a 10 second delay, but I'm not expecting anything much better. Also anyone more informed on this forum want to let me know what the risks of setting an extra long TDR delay (from 2 seconds to 10 seconds) can be?