Bios Unlock successful - what NOT to mesh around with ?

Hello.

recently I got my BIOS unlocked and now im uncertain what to stay away from.
Does enyone have a guide-line what can be change, and what cannot ? More specific C-state.
The guy who did my BIOS, advised me to:
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do not disconnect the intel video card!!!!!

no change size videomemory!!!!
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The reason I wanted to unlock my BIOS, is because the C-State is causing "CPU Whine" / noise when idling.
I haven't changed enything yet.

My laptop is a Toshiba L870-179 which have been upgraded from a i3 to a i5 CPU.
Furthermore I have upgraded to 8Gb RAM + SSD and a intel 7260 wireless AC.
it's a InsydeH20 rev. 3.7 BIOS.

I have attached a few pic's from BIOS.

So if enyone knows something, please advice

Regards.

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