Question CP2077 GPU usage drop and corresponding FPS drop

DNAP2010

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Jul 22, 2015
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Here's a screenshot of MSI Afterburner showing my GPU usage dropping to 0% and my FPS plummeting along with it (I paused immediately after the FPS drop occurred): View: https://imgur.com/gallery/0EAqId4

It happens periodically. It doesn't happen in other games. I've tried uninstalling GPU drivers using DDU in safemode and reinstalling several times. I saw a similar thread here but it was left unresolved and featured VALORANT, a game that is less demanding so I wasn't sure if it was specifically relevant. Does anyone have any insight/suggestions?
Here are my specs:
i9 10900k (No OC)
RTX 3090 (No OC)
32 GB DDR4 RAM at 3600 MHz
Windows 10 Pro
MSI Gaming Z490 Edge
 
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hotaru.hino

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Sep 1, 2020
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I've had issues where the game would start at around 60 FPS (I turned on ray tracing), but after some time would drop below 30 FPS and would stay that way no matter what I did. I had to restart the game to get performance again. But as of the most recent update, I haven't had this problem.
 

DNAP2010

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Jul 22, 2015
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I've had issues where the game would start at around 60 FPS (I turned on ray tracing), but after some time would drop below 30 FPS and would stay that way no matter what I did. I had to restart the game to get performance again. But as of the most recent update, I haven't had this problem.
Interesting. I wish that were the case for me. I mean, it runs find in between these spikes. I'll be getting like 60-90 FPS, depending on scene, and then my GPU usage drops to nothing and it's a slideshow for 3-5 seconds. I can't figure out what's causing this to happen.
 

hotaru.hino

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Interesting. I wish that were the case for me. I mean, it runs find in between these spikes. I'll be getting like 60-90 FPS, depending on scene, and then my GPU usage drops to nothing and it's a slideshow for 3-5 seconds. I can't figure out what's causing this to happen.
Does it resume going back to normal performance afterwards?
 

hotaru.hino

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Sep 1, 2020
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Yes. It freezes outright or drops to like 3-5 FPS for some period of time less than 8 seconds or so, and then proceeds normally.
That to me sounds like something hosing up VRAM. I was suspecting such when I was having my problems but didn't bother looking at it once didn't seem to happen. I think the only way to verify it's VRAM getting hosed up is using GPU-z or HWiFNO and see if the PCIe bus utilization has gone up full throttle.
 

DNAP2010

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Jul 22, 2015
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That to me sounds like something hosing up VRAM. I was suspecting such when I was having my problems but didn't bother looking at it once didn't seem to happen. I think the only way to verify it's VRAM getting hosed up is using GPU-z or HWiFNO and see if the PCIe bus utilization has gone up full throttle.
I suppose that could be it. I wouldn't have previously thought that most anything could use up all 24 GB of a 3090, but CP2077 has surprised me in plenty of ways, so I suppose anything is possible. Thank you for your replies.
 
Sep 23, 2020
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I suppose that could be it. I wouldn't have previously thought that most anything could use up all 24 GB of a 3090, but CP2077 has surprised me in plenty of ways, so I suppose anything is possible. Thank you for your replies.
What cables are you using to connect to your displays? I'd make sure they're all the same version of the newest version of cable.
 

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