6800K missing MHz

[El Jimben]

I switched over to a X99 build recently and managed to get my 6800K up to a modest 4GHz:

Now though, for some reason, my overlock has disappeared! I'm on the beta BIOS which fixes the issue of the Windows hotfix breaking overlocking so I'm not sure what's going on. Have I somehow changed something in the BIOS inadvertently? Here are my settings:

 

[LuckyBenski]

I'm confused, those pics all show 4GHz. Are you concerned about the 3999.07? It's a base clock of 99.98 so that's just .02%... It's just what clock speeds do. You'll end up with an odd fraction which means you're a few MHz out. It's normal

 

[El Jimben]

Nothing in Windows now reports 4GHz & even when I run IBT & fully load the CPU, all I see now is 3.4Ghz.

 

[Radox-0]

I can see your AVX offset in the bios is set to auto, could be the reason why it’s dropping clocks as the IBT does use AVX instructions. Could be worth tweaking that setting.

 

[El Jimben]

I can see your AVX offset in the bios is set to auto, could be the reason why it’s dropping clocks as the IBT does use AVX instructions. Could be worth tweaking that setting.

Yep, that's fixed it, thanks Strange though as I'm sure that it was set to Auto before!