Question CPU Frequency keeps going to 4.0- 4.1ghz despite I set it to 3.60 ghz in bios

May 6, 2019
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I got a ryzen 5 2600x and the frequency keeps changing to 4.0 ghz or 4.1 despite the fact that I set it (lock it) to 3.6 ghz in the bios, I dont know what else to move in bios to lock it in 3.6ghz
 

DMAN999

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Apr 17, 2019
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That is the PBO (Precision Boost Overdive), which is similar to Turbo Boost on Intel CPUs, kicking in.
It boosts the clock speed on 1, 2 or more cores as needed when the CPU is under load.
I would leave it on as it is a good feature that will definitely improve performance with no negative effects that I know of.
I have a Ryzen 5 2600 OC'd to 3.95 GHz which gets me close to the stock performance of your 2600x.
If I had a 2600x I would leave it at stock settings with PBO enabled.
 
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Karadjgne

Titan
Herald
Run Prime95 torture test. Guaranteed you'll get all those cores running at 3.6GHz (assuming your cooling is sufficient). At loads of less than 100%, the cpu will assume it can go faster on a few cores, as faster = better. As long as the cpu temps are not in throttle ranges, the cores will go as fast as they can, which in your case is 4.1GHz.

This is a benefit. There's not all that many games or even programs that will max out 6c/12t usage, they'll generally use 4c/8t at most, so bumping speeds with PBO gets higher performance on fewer cores.
 
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