Ryzen 2600 not reaching full boost clock on Prime95

steffeeh · May 25, 2019

I just built a PC for a friend and I'm currently testing stuff out to make sure the hardware works as it should. Right now I'm running a Ryzen 2600 at stock speeds with Prime95 small FFTs just to see if the cooling is alright in case I've had mounted it badly.

Temps are great, 56C at the moment, but by some reason I'm not getting full CPU utilization, the clock speed is only hovering around 3.5GHz whereas the full boost is at 3.9GHz.

GoldenLag · May 25, 2019

Full boost does not include allcore load.

It only applies for 1-2 cores.

porina · May 25, 2019

3.9 is the all core turbo, at least it is on mine. How are you checking the clock speed? If you try another application like one of the versions of Cinebench, does that also stick to 3.5 or does that go up to 3.9? My Ryzen system isn't plugged in at the moment so I can't do a quick comparison.