5800X remains stable above stock PPT and 4.78Ghz across all cores.
5800X remains stable above stock PPT and 4.78Ghz across all cores.
I've been adjusting my CPU OC settings to reach 4.8ghz with all cores turbo enabled for AVX tasks on a 5800X running at -30 CO and 3X scalar. The scalar seems important for generating the correct current at that speed, even though it's a bit high. It won't last forever anyway. I've been pushing past 142w PPT, but the current settings are fixed at 190w PPT, 160A EDC, 100A TDC. Right now it only pulls stock performance.
Hey there,
Setting all cores to -30 might be the problem. Per-core performance is better for very high clocks. Your CPU boosts are 4.7ghz on 1-2 cores, but reaching 4.8ghz across all cores isn't realistic without a significant voltage increase. Also, this could negate any undervolt protection you have.
What program are you running for stability? Are you using the BIOS to adjust settings, OC/UV, Ryzen Master, or another third-party tool?
Bios to OC and UV, it seems adjusting voltage affects the pbo algorithm and I lose boost. It’s possible to add voltage to maintain performance without hurting PBO gains. -30 gives the best results so far—around 4.75-4.78ghz with AVX workload (cinabench) and 4.88ghz for non-AVX tasks. What could be causing PBO to reduce boost when voltage is applied? Also, I’m concerned about thermal limits. At 4800mhz on a single core, maxing out at 75°C with current specs (4.75-4.78Ghz on cinabench) feels risky.
You might consider adjusting the vcore offset. It could be negative or positive depending on the trick. PBO seems to help reduce boost while meeting the algorithm requirements. At those clocks, margins are acceptable.