CPU Core Multiplier Won't Stay PUT

Windows power saving.

Fixed ratios in the UEFI will force an all core frequency, this will only come into effect when the system needs it however. Windows power saving will further lower frequencies when the system load is low. Under load without a fixed all core multiplier the CPU will vary the frequency depending on how many cores are loaded, this can provide a higher frequency when fewer cores are under load but in cases where all cores are loaded it will run at a lower frequency. Locking all cores to a multiplier tends to mean you lose frequency in lightly threaded tasks but gain significantly under heavier, more spread out load. It is much easier for the CPU to handle higher clocks on say 2 cores than it is on 8 so it is unlikely you will be able to get all cores stable at the same clocks you could achieve on just 2 or 4.

Personally, I prefer leaving my system stock. AMD's XFR2 works very well and frequently boosts the CPU higher than I can manage stable with a fixed OC. If however you are performing tasks with your system where all core performance is critical then an all core OC will do wonders. In gaming however I find XFR2 tends to score me more FPS on average than a fixed OC.

Edited by Xaltar - 05 May 2019 at 5:30pm

Thanks for the input. I can't believe they make a board with core configuration that doesnt work, lol. Why even put it in the bios then? Thats sad. All cores are always under load as im crunching for charity sites and it runs tasks on all cores. So i would very much like it to stop slowing down and just run at whatever speed i can keep it cool at instead of slowing down all the time when temps are just fine. Hope there is another work around, otherwise i guess ill have to upgrade the board.