Issues have arisen with the Ryzen 7800X3D and 4090 GPU setup.
Issues have arisen with the Ryzen 7800X3D and 4090 GPU setup.
I recently switched to a 7800x3d configuration from a 5900x3d setup, keeping only my PSU and GPU, and have encountered performance problems in games.
Previous System Details
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 Specifications
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 assembling the 7800x3d system, I experienced inconsistent display output. It turned out the PCIe connector for the GPU was broken and the card wasn’t properly installed. After swapping the motherboard, the problems disappeared, but games consistently displayed much lower FPS than before—sometimes even below the 5900x build. At one point, I encountered blue screen crashes during gameplay; dump logs are attached. I also switched the RAM to an AMD Expo model and tried using it at standard speeds, but nothing resolved the issue.
I’ve observed two key points: 1) During these incidents, the GPU draws very low power—often under 300W despite high usage. 2) Restarting the system resolves the problem temporarily, restoring stable performance and higher wattage.
This behavior has affected every game I’ve played: Alan Wake 2, Avatar Frontiers of Pandora, Modern Warfare 3/Warzone, Cyberpunk 2077.
A video illustrating this issue is included at the bottom of this post.
I’ve reinstalled Windows several times, updated BIOS and reflashed it, and reset the BIOS to default to ensure PBO is disabled, yet the problem persists.
Since replacing the motherboard and RAM, I suspect the GPU or CPU is the root cause. Initially, I assumed the GPU was damaged due to improper mounting on the old board with a faulty PCIe slot. However, after swapping components, the low wattage issue remains, and I’ve noticed some stuttering I didn’t see before.
My memory test passed, and the 7800x3d now achieves Cinebench scores close to what others report online.
At this stage, I’m considering an RMA for either the CPU or GPU, but would greatly appreciate any insights or guidance to identify the exact problem.
Thank you!
Mini Dump Files
Video Showing Performance Problems
Hello there! I noticed you're asking about the age of your PSU and the BIOS version on your motherboard. Let me know if you need help with that!
Hey there,
Your PSU looks decent for the moment. The lowest specs needed for that GPU are around 850w, and then a bit more. This card also experiences some temporary power fluctuations (though not as severe as the 3xxx line). It's interesting you haven't run into problems yet. I think it might just be a matter of luck. When you updated the BIOS, did you also clear the CMOS? You can check the manual here: https://download.asrock.com/Manual/B650E PG-ITX WiFi_English.pdf, page 37. If you didn't, make sure to do it before proceeding. Running the system up and down without clearing CMOS can lead to issues.
Hey everyone, thanks for your feedback!
I've been using the PSU since early 2021 with a 3090 before switching to a 4090 midway through last year. I know it's under the suggested wattage for a 4090, but it's worked well for many in the small form factor community and I haven't faced any problems or exceeded its limits during my use with both the 3090 and now the 4090.
I haven't managed to match the low wattage performance from my previous 5900x setup, even though it was more demanding than the 7800x3d. I get why you're suggesting the PSU, but I noticed system issues when I added new components. To be sure, I also experienced similar performance problems using a spare 850W Corsair unit from an older ATX build.
I'm running BIOS 2.02 and cleared the CMOS with the jumper.
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?
I'm facing a nearly identical problem with an RTX 4090 paired with a 7800X3D, where restarting resolves the low frame rates. Have you found a solution? Your feedback would be greatly appreciated.
A solid platinum 850w at least is recommended, especially with a 4090.
I wouldn't go below 1000w for any 4090 setup!
Founders edition or not.
I have an RM1000x, so if OP and I are facing the same problem, the power supply is probably not the issue.
it doesn't seem like the problem is there either, but running at 750w on a 4090 is really intense!
In my earlier notes on this situation, I observed that the GPU power consumption drops by around 70 W at the same position on the same map. Remarkably, all metrics such as GPU utilization, core clocks, memory clocks, and memory usage remain unchanged compared to when the problem occurs. The frames per second are about 30% lower. I have attempted to adjust the power limit using MSi Afterburner, but it did not fix the issue.