Question Performance Issues with Ryzen 7800X3D + 4090 GPU ?

[ht1crab]

I recently upgraded to a 7800x3d system from a 5900x3d system, carrying over only my PSU and GPU, and have been having performance issues in games. Prior to this upgrade I had no issues, perfect performance and no stuttering or crashes.

Old System Specs

• Mobo: ROG Crosshair VIII Impact
• CPU: Ryzen 5900X
• RAM: 64GB Crucial Ballistix DDR4 3600MHz
• Boot Drive: Samsung 980 Pro 1TB (Windows 10 Pro)
• GPU: 4090 Founders Edition
• PSU: Corsair SF750

New System Specs

• Mobo: ASRock B650E PG-ITX
• CPU: Ryzen 7800X3D
• RAM: 64GB Corsair Vengeance DDR5 6000MHz AMD Expo (CMK64GX5M2B6000Z30)
• Boot Drive: Samsung 990 Pro 2TB (Windows 10 Pro, fresh install)
• GPU: 4090 Founders Edition
• PSU: Corsair SF750

After I initially built the 7800x3d system, I was having trouble getting consistent display output. I found that the PCIe latch for the GPU was damaged and the GPU was not properly seated. I then replaced the motherboard outright and those issues went away, but I found that games were frequently putting out far less FPS than expected, even less than the prior 5900x build -- at one point, I even got blue screen crashes in games, dump logs will be attached. At this point, I also changed the RAM from an XMP kit to an AMD Expo one, and also tried running them at stock speeds, but none of this seemed to have any impact.

I have noticed two things about this behavior: 1, when it happens, GPU wattage is always quite low, below 300W, despite usage being almost 100%. 2, a system reboot can fix the issue and give expected, mostly stutter free performance for a time, and the wattage being pulled is correct and much higher. I have been able to observe this performance issue in every game I've played so far: Alan Wake 2, Avatar Frontiers of Pandora, Modern Warfare 3/Warzone, Cyberpunk 2077.
I have made a video demonstrating this performance issue which is attached at the bottom of this post.

I have reinstalled Windows multiple times, updated and reflashed BIOS, and reset BIOS to default to ensure things like PBO are disabled, but to no avail.

Since I have replaced the motherboard and memory outright, that realistically only leaves the GPU or CPU as the culprit, and I was inclined to blame the GPU, thinking that it somehow could have been damaged while improperly mounted into the original motherboard which had the damaged PCIe latch. For the past week, I have reverted to my previous 5900x system and have not been able to replicate the extremely low performance and stuttering paired with the low wattage, however I have observed some stuttering that I do not believe was there before.

My memory passed mem test, and I've been able to get the 7800x3d to do multiple Cinebench runs hitting scores that are near what others are reporting online.

At this point, I believe my only options to be RMAing the CPU or GPU, but I'd be extremely appreciative if anyone has any ideas, or could at least nail down which is the culprit, as I have been troubleshooting this for weeks at this point and have no further ideas.

Thank you!

Mini Dump Files

Video Demonstration of Performance Issue

 

[Lutfij]

Welcome to the forums, newcomer!

PSU: Corsair SF750
How old is the PSU in your build?

For the sake of relevance, what BIOS version are you currently on for your motherboard?

 

[Roland Of Gilead]

Hey there,

Well to start with your PSU is on the light side. The min requirements for that GPU is 850w, and then some. This card also suffers from transient power spikes (though not as bad as the 3xxx series.) It's funny that you haven't had issues yet. I'd put that down to a lucky coincident.

When updating the bios did you clear CMOS? Like here: https://download.asrock.com/Manual/B650E PG-ITX WiFi_English.pdf page 37. If not, then you should do that first. Going up and down without clearing CMOS, lends itself to issues.

 

[ht1crab]

Hey guys, thanks for the replies!

I've been using the PSU since early 2021 with a 3090 before I got the 4090 mid last year. I'm aware that it is below the recommended wattage for a 4090, but it's been used successfully by many others in the small form factor community and I've never had any issues with it or come close to pulling too much wattage from it in the years that I've been running it with the 3090 and now 4090.

I've not been able to replicate the low wattage from the GPU with my old 5900x setup, despite the 5900x being thirstier than the 7800x3d. I understand why you guys would point to the PSU, however I started observing issues with system when I introduced the other new hardware. And just to rule it out, I did replicate the performance issues with a spare 850W Corsair unit I have from an old ATX build.

I am running BIOS 2.02, and I did clear CMOS with the jumper.

 

[Roland Of Gilead]

I've been using the PSU since early 2021 with a 3090 before I got the 4090 mid last year. I'm aware that it is below the recommended wattage for a 4090, but it's been used successfully by many others in the small form factor community and I've never had any issues with it or come close to pulling too much wattage from it in the years that I've been running it with the 3090 and now 4090.

As mentioned, that may just be a coincidence. There is a reason they say' recommended'. It's because without that as minimum, it's impossible for anyone to tell whilst troubleshooting if it's the cause. But, I guess you know that already.

What 850w Corsair did you use?

Have you reinstalled the OS?

 

[jonasa97]

I have a very similar issue with an RTX 4090 and a 7800X3D, where a restart fixes the low frame rates. Have you managed to resolve this? Any input would be much appreciated

 

[ilukey77]

Hey there,

Well to start with your PSU is on the light side. The min requirements for that GPU is 850w, and then some. This card also suffers from transient power spikes (though not as bad as the 3xxx series.) It's funny that you haven't had issues yet. I'd put that down to a lucky coincident.

When updating the bios did you clear CMOS? Like here: https://download.asrock.com/Manual/B650E PG-ITX WiFi_English.pdf page 37. If not, then you should do that first. Going up and down without clearing CMOS, lends itself to issues.

1000% start with a decent platinum 850w at the very least if using a 4090..

Personally i wouldnt start under 1000w for any 4090 !!

founders edition or not

 

[jonasa97]

1000% start with a decent platinum 850w at the very least if using a 4090..

Personally i wouldnt start under 1000w for any 4090 !!

founders edition or not

I have an RM1000x, so assuming OP and I are experiencing the same issue, then the power supply is unlikely to be the cause.

 

[ilukey77]

I have an RM1000x, so assuming OP and I are experiencing the same issue, then the power supply is unlikely to be the cause.

ohh i dont think its the issue either but 750w on a 4090 is crazy to start !!

 

[jonasa97]

In an update to my prior observations of this phenomenon: it causes my GPU power draw to decrease by approximately 70 W on the same exact map, looking at the same exact spot from the exact same location. Astonishingly, the GPU utilization, core clocks, memory clocks, and memory usage are the same as when the issue is not present. FPS are approximately 30% lower. I've tried resetting the power limit with MSi Afterburner, but this did not resolve the issue.

 

[jonasa97]

Upon further testing, I found that the problem was related to the GPU running in PCIe 1x mode on a cold boot (i.e., a shut down followed by start, as opposed to a restart). I have fixed this problem today by installing the latest BIOS for my MSi B650 Tomahawk WiFi (7D75v1E; AGESA ComboPI 1.1.0.2b), which was released just 2 days ago.