Bright flashing lights in 3Dmark Port Royal (7900XT)

[Fastfishy2]

I keep seeing these bright white flashes at certain points of the 3Dmark Port Royal benchmark since I got my 7900XT. They only happen at specific parts of the benchmark and in certain areas of the scene. They also don't happen 100% of the time, but when they do, they're in those places.

I don't see this issue on 3Dmark Speed Way, Steel Nomad, or any of the games that I play, including those that max out the 7900XT's power limit. I have also reinstalled 3Dmark to no avail, and reinstalling my drivers with DDU wipe didn't help either. I don't see this in other people's recordings of Port Royal, otherwise I wouldn't be worried.

Specs:
5800X3D
32gb DDR4-3200
Sapphire Pulse 7900XT
Rog Strix B550-A
Corsair RM750x 2021

I can only provide a picture as neither the forum nor Imgur will cooperate with the 3 second MP4s that I captured.

 

[Vya Domus]

Pretty strange, they don't look like typical artifacts, I don't have Port Royal so I can test this

 

[Fastfishy2]

Pretty strange, they don't look like typical artifacts, I don't have Port Royal so I can test this

Yeah, I also tested on furmark gpu stress test and nothing there either.

 

[Vya Domus]

It kind of looks like when there is a bug with the z buffer and something gets rendered in an incorrect order.

It's strange that you say it doesn't always happen.

 

[Fastfishy2]

It kind of looks like when there is a bug with the z buffer and something gets rendered in an incorrect order.

View attachment 349109

It's strange that you say it doesn't always happen.

Yeah, I don't know why it doesn't happen every run. But they're always bright white and only happen in 2 specific areas of that specific benchmark if they happen at all.

 

[Fastfishy2]

It kind of looks like when there is a bug with the z buffer and something gets rendered in an incorrect order.

View attachment 349109

It's strange that you say it doesn't always happen.

I did some playing around with custom runs of Port Royal. Turning off Bloom made the problem disappear. So, something at certain areas of the benchmark is briefly rendering as hyper-reflective when it shouldn't be. I've tried Time Spy, Steel Nomad, and Speedway and none of them have the issue or look any different to how they did on my previous RTX 4070.

 

[Toad_jo]

I'll reply to this because I had the same issue with port royal. I have a 6900xt red devil and I was getting the same white artifact and I was stressing about it thinking my vram was broken. Thanks for the insight so I can test another test instead of port royal

 

[Fastfishy2]

I'll reply to this because I had the same issue with port royal. I have a 6900xt red devil and I was getting the same white artifact and I was stressing about it thinking my vram was broken. Thanks for the insight so I can test another test instead of port royal

yeah, often if you can't consistently reproduce the issue elsewhere, it's a quirk with the particular test & your software setup, not necessarily hardware.

I will also update here and say that the people from 3Dmark actually got back to me about this particular issue and said it's not indicative of a problem with my graphics card but it's something that can occasionally crop up on that test.

 

[Artem_M]

You will have to get used to occasional problems. This is AMD. Strange things often happen to them, related to the incorrect operation of GPU drivers.
But AMD followers can deny it. Just deal with it.

 

[StarryByte]

I think it is just random reflection. I think I found on youtube something like that, there is light behind the camera that is being reflected

You will have to get used to occasional problems. This is AMD. Strange things often happen to them, related to the incorrect operation of GPU drivers.
But AMD followers can deny it. Just deal with it.

Nvidia has problems too, but nvidia followers deny them...
For example: flickering G-sync and linux drivers

 

[Steevo]

I had the same thing happen occasionally, Yes turning bloom off "fixes" it, and or making sure you don't have your contrast and brightness too high and HDR...

No different than sunlight reflections IRL.


This "issue" for the longest time was due to AMD/ATI having a true 10 bit render depth, Nvidia was using 8 bits or less for extra performance. HRD/Bloom effects appear to sparkle as actual white.