i7-7700(non-k) not hitting 4.2ghz when C states are disabled. Fix through BIOS mod?

BIOS/UEFI Modding BIOS Modding Guides and Problems
1

Hello,
the motherboard is a Biostar B250 BTC, and whenever I disable C states my CPU doesn’t boost to 4.2ghz instead locks itself to 4ghz.
I have it set to 4.2ghz in the BIOS but it doesn’t change the multiplier or something is blocking it, is it possible through a BIOS mod to
disable this restriction and get the full performance of the processor?

Here is my mainboard BIOS:
http://www.biostar-usa.com/app/en-us/mb/…ID=865#overview

2

Leave C3 enabled.

3

Thanks for the quick response, I’ll try!

4

You’re welcome. I had similar issue recently, and found C3 enabled but rest disabled allowed the higher multi to be used under loads

5

If using Windows set your power plan in the control panel to ‘High Performance’.

6

Yes ^^ that too, always! Thanks Chinobino. I also set Advanced >> Processor Power Min/Max both to 100% as well.