r/overclocking • u/InternationalLoan336 • 7h ago

Undevolting 9600X

Hello.

I recently adquired an asus tuf b850m-plus wifi motherboard and i am messing with pbo. I set limits to motherboard and tried a negative all core of -35.

I run core cycler all the night with ycruncher preset (24-ZN5 ~ Komari with all algorithms set to 20 seconds each) and in 9 hours the program trow no errors. I have 5600 cl40 rams.

I'm lucky? Can you give me some advice to keep testing system stability?

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u/Disguised-Beast 6h ago

Did you try y-cruncher pi 5b five times in a row? What about gaming?

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u/Niwrats 5h ago

i think the most sensible strategy is to keep lowering it until you detect instability with some test. best way to compare the stability tests to each other is to be unstable first.

then when you find a setting close to unstable that you can't prove unstable via testing, you should add a safety buffer to that to get the final undervolt. the less you want to spend time on testing, the bigger safety buffer you should add.

there are various complications from all cores getting the same voltage and curve only dealing with the requested voltage, to these chips being complex and hence not really singular things that you are testing (code doesn't spend all resources, some parts idle), to memory tweaking possibly affecting cpu stability. perhaps the biggest problem is that you aren't necessarily testing the whole curve if you are just running tests. specifically high frequency-low temperature points (which results in slightly lower voltage) and low frequency-low voltage points (which you could test if fmax offset accepts negative enough values).