I'm sorry if all or part of what I'm about to say is something you already know, but I'm not sure what your current overclocking level is.
It definitely sounds like your GPU doesn't like the increased PCIe frequency, same thing happened with my 4090. Unfortunately, aside from dialing back the BCLK, there’s not much you can do.
Also :
- Keep in mind that when overclocking the 9800X3D, you'll probably hit around 102–102.5 BCLK before you see diminishing returns in multi-core performance. Your single-thread performance should still improve though, which is usually what you’re aiming for in gaming.
- Good cooling is key to a stable overclock, so if you don't have a solid AIO or custom watercooling, I wouldn't recommend going beyond standard PBO +200 MHz.
There are a few BIOS settings that can help your overclock, along with some software tools you'll need to monitor and test your speeds. This isn’t a complete list, I’m at work right now and not in front of my home PC, so I might miss a few.
BIOS:
- Disable Integrated Graphics
- ⇒ Advanced / Integrated Graphics Configuration
- Disable Spread Spectrum
- ⇒ OC / Advanced CPU Configuration
- Set Limit to "Advanced" / Motherboard (removes power limit)
Scalar: Manual, x10 (gives more headroom for overclocking)
- ⇒ OC / Advanced CPU Configuration / PBO
- Load-Line Calibration:
For CPU, 8 gives max overclocking room, but 3–5 is usually most stable
For VSOC, I recommend 3
CPU Switching Frequency: 1000 kHz (faster response, better for stability when overclocking)
CPU Vcore Overvoltage Protection: 400 mV(gives headroom for spikes during heavy load, useful in OC)
VSOC Switching Frequency: 1000 kHz
- ⇒ OC / near bottom in DigiALL POWER
- Set UCLK = MEMCLK (on DDR5 6000–6400 configs)
- ⇒ OC / UCLK DIV1 MODE
Set Infinity Fabric to 2000 MHz (keep in mind it scales with BCLK , for example, at 103.5 BCLK, 2000 , becomes 2070 MHz)
- ⇒ OC /FCLK Frequency
SOFTWARE :
Monitoring, nice and easy to use, mostly accurate.
HWINFO64
Monitoring, bench and memory test ( Actually I only use it to test memory stability and run memory benchmark, because its accuracy is really bad at monitoring and other benches IMO)
AIDA64
Great stability tester for memory, for quick test use option 0, 1, 8 (great for a quick test when running 32 GB memory)
Y-Cruncher
Quick multi-thread and single thread Benchmark ( not the most reliable but the one I use almost on every boot to see if my speeds are "normal" and actually the single thread bench is not that bad)
CPU-Z
Good mult-thread benchmark (particularly useful to see if your CO curve is stable !) , Ok single thread benchmark but a bit too slow IMO.
CinebenchR23
Great Cpu stability tester ( but really poor benchmark value IMO)
OCCT
I may add a few tweak tonight when i get home.