I recently upgraded my PC by switching from a Ryzen 5 3600 to a Ryzen 7 5800X, but I'm facing some serious performance issues. My previous setup included an RTX 3070 Ti and worked just fine. Now, with the new CPU, I'm seeing games that should easily hit around 150 FPS only producing about 20-30 FPS, and GPU usage is only around 40-60% even under load. I've checked everything from BIOS settings, drivers, and even did fresh installs of Windows to see if that would help, but nothing seems to fix it. I tried a new B550 motherboard too, thinking it might solve the issue, but I'm still stuck with the same symptoms. Very briefly, I saw the GPU performing normally under a stress test, but then it plummeted again. I'm starting to think the CPU might be the problem since it's the common factor, but I also have my doubts about the GPU or the power supply being at fault. Anyone else experienced something like this or have any ideas?
5 Answers
I had a similar issue before, and it turned out to be a BIOS bug. Definitely update the BIOS, reset it to the default settings afterward, and see how it goes. Also, just to be sure, did you remember to connect your monitor to the right output? Sometimes that’s the culprit!
It sounds like you've done a lot of troubleshooting already. Since the issues follow the 5800X to different motherboards, it might be causing the GPU to miscommunicate or get stuck in low-power states. Here are a few tips:
1. Check your BIOS settings. Disable Global C-State Control and try setting PCIe to Gen 3 instead of Auto.
2. Make sure your Windows power plan is set to High Performance.
3. Install the latest AMD chipset drivers from their site—don’t let Windows do it for you!
4. Finally, consider updating the BIOS of your B550 board since it might fix some known issues.
If all else fails, your 5800X might be defective, which does happen sometimes. Keep testing and good luck!
I've already gone through the BIOS settings and power plan adjustments, but I'll give the chipset drivers another shot. Thanks for the input!
You mentioned your GPU works fine with the 3600, so I really think this points to either a setting related to the new CPU or the CPU itself. Have you checked if Resizable BAR is enabled in the BIOS? That could also affect performance.
Just to clarify, when you tested the 5800X, did you monitor clock speeds during load? It might point to thermal throttling or settings messing with your performance. Keep pushing to isolate it!
Since you have two PCIe slots, it's worth checking if the GPU is seated properly in the x16 slot. If it’s an option, try testing the GPU in another system to rule out a defect. It could also help to see what speed your PCIe port is running at with the new setup.
Yep, no iGPU with the 5800X, so that's not an issue. But it's a good reminder! I'll keep a close eye on the BIOS update.