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8700K Core Speeds Issue

V

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Gawd
2FA
Joined
Mar 31, 2005
Messages
830
I've been running my 8700K @4.9Ghz quite nicely for some time. I changed something in the BIOS the other day (the LLC I think) and now the core speeds won't hit 4.9Ghz under load (Prime95/Handbrake). By that, I mean the cores will show 100% but the core speed will fluctuate between 3.7Ghz and 4.9Ghz (usually somewhere in-between).

If I load a game, the cores go to 4.9Ghz.

I'm not currently running an AVX offset, though I've tried it with that as well, makes no difference.

Reset the BIOS, running at stock the CPU seems to behave correctly with Prime/Handbrake.

Temps are fine, I don't get it??

1581933966351.png


*EDIT*

Noticed it appears to be throttling to stay at 95w. I've now changed two parameters in the BIOS I've never touched before, namely

Long Duration Power Limit (W) [Auto]

Short Duration Power Limit (W) [Auto]

Setting these to 200 and 150 respectively appears to have solved this issue, but I can't understand why it's suddenly started doing this and why I needed to change those settings.
 
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