5900X applies reduced voltage via PBO2 while using a curve optimizer, but it still crashes.
5900X applies reduced voltage via PBO2 while using a curve optimizer, but it still crashes.
The situation sounds quite frustrating. It seems the PBO settings and voltage adjustments haven’t resolved the issue. I’ve noticed the crashes occur under different conditions—like logging to Windows or playing Doom Eternal. Testing up to 30 offsets helped with Cinebench, but not in real-time games. The negative curve optimizer might be affecting stability. Have you tried other BIOS versions or different Ryzen models? It’s possible the hardware is pushing limits. Let me know if you want more troubleshooting tips!
I've noticed some explanations that don't fully grasp the benefits of undervolting on 50xx chips. In short, it provides thermal and voltage headroom, enabling PBO2 to run at higher clocks while maintaining slightly better temperatures than the original design. Every chip behaves differently—while I can push 30 on my 5900x, my friends with a 5800x only manage around 10. A helpful video walks through the process well, showing how cores can hit nearly 5.1k cycles and full loads settle between 4.6 to 4.75. I adjusted a few settings afterward, but fine-tuning really comes after getting the undervolts right.
You're experiencing problems with negative offset settings on your 5900x, causing blue screens when running Cinebench. Testing with a BIOS update seems promising since you need voltage adjustments. Your setup uses a Gigabyte B550i Aorus Pro AX motherboard.
I gradually worked to lower the values until I hit -30 and felt stable—no crashes occurred. I tested games, Blender, and Cinembach. With everything set to default, my CPU ran Blender at 84°C, around 4333MHz across all cores. Now it’s about 66-70°C with 4441MHz while the Corsair H60 fan spins at 3K RPM. Did I just win the lottery?
It might fail unexpectedly, even though it looks fine at first. Sometimes it appears reliable but then stops functioning days later. Still, it seems like you received a solid 5900X to handle the task effectively!
13 performed well on my CPU, reduced temperatures in Blender by 10°C and experienced a slight speed increase.