PBO overclocking difficulties?

seal2145 · 4 Sep 2023 at 12:05

Hello, okay so I will start with my "broken PBO" experiences. Maybe my fault idk but when I use it I get lower frequencies on heavier workloads (than with a static oc) higher temperatures (reaching thermal throttling or even shutdown). And idk how to test for the stability because anytime I try testing stability it massively downclocks (from like 4.6ghz to 4.3) and how is such a stability testing uhhh done? With static oc of like 4.45 it's easy nothing downclocks it's all the same (and 70c OCCT test) and I know it's stable it also doesn't burn my CPU like hell and even score higher performance in games (idk how but ye).
What am I doing wrong? I watched several guides and none seems to work PBO makes my 70c load cpu jump to 90+(occt test) while also performance drops (games and cinebench) because of massive downclocking and it wasn't stable aswell games were crashing, bsods freezes stutters etc.

So because of my experiences I just use 1.29v static oc 4.45ghz and never had an issue for a year or more now but if there are truly gains to have using PBO I'd like to know how can I achieve them. It doesnt seem to matter if the PBO is stock settings or I follow guides, none get the performance, temperature / power consumption and stability of how I have configured my actual static clock.

Wing-Man · 4 Sep 2023 at 12:17

What cpu?

And yes I find with my old 3700x and 5600x I could get higher clocks with less voltage on a static OC.

seal2145 · 4 Sep 2023 at 12:33

Oh so Im not alone lol, the cpu is R7 5700G, basically I can get the clock higher on PBO in idle or low workloads, but anything heavy downclocks to like 4.1-4.3 (from 4.6) depending how good I set up the PBO and even at such a low frequency its hot and unstable, I just keep 4.45 Static oc and am satisfied, Id like to increase the voltage slightly to like 1.31 and see if I can push 4.5 static.

Wing-Man said:
What cpu?

And yes I find with my old 3700x and 5600x I could get higher clocks with less voltage on a static OC.

Wing-Man · 4 Sep 2023 at 12:37

I think you may need to set boost states for different core count. When you use pbo it will still boost lower for heavier loads. When you run fixed you set all cores to X and that’s it.

seal2145 · 4 Sep 2023 at 14:01

Wing-Man said:
I think you may need to set boost states for different core count. When you use pbo it will still boost lower for heavier loads. When you run fixed you set all cores to X and that’s it.

Yes I know I watched guides and got some knowledge how to do it, I figured some cores can take -20 just fine but some can barely go -5 but idk I couldnt set it up so it was stable / efficient as my static oc.Maybe I just didnt get the grip of it but the best result in prime 95 load was 4.4ghz actually close to my static all core OC but the cpu temp was 95c compared to like 70-80 on my static core oc.

MadMatty · 6 Sep 2023 at 23:55

Default PBO limits are probably the same as Motherboard limits and way higher than need be. With a high edc, pbo may just overvolt for the hell of it causing temps to rise and clocks to fall. With the 5700G being a 65w part, maybe try setting pbo limits to match a 105w part, 5800x (142w/90A/140A). Then work on curve optimiser to get the volts down. Using Ryzen Master curve optimiser stress test is good for getting a base line for the per core co values although I find reducing the result by -5 is a good idea for stability. Adding Boost override into the mix will likely mean lowering the co vlaues some more at least on the primary and secondary cores.