so these have been a few frustrating hours. Setting up a asrock z68 extreme3 gen3 with a i5 2500k for a friend. Long story short i finally came to the point where it would accept that i change the multiplier to 42 for 4.2ghz, and i set voltage to fixed 1.35 though it shows 1.28v and 1.27 in tools depending which one you use ( i guess this is the infamous voltage drop ). I set intel speedstep and C1E to disabled. yet when windows starts CPU Z shows it at 1.5 ghz, when stresstesting it does go to 4.2ghz, but also reverts back to 3.3ghz now and then during the stresstesting. in general it feels like the bios isnt accepting changes, it shows as changed, but sometimes only when you change it for the third time to a different value it wants to apply. Any tips are appreciated.