p7p55d multiplier?

[Aseliot]

Okay I overclocked my i7 860 to 4ghz with the multiplier on 21 but it wasnt stable (temp). So i took apart my computer remounted the cooler and changed some things but now where i previously could go over 4ghz with the multiplier alone it is now impossible? I really don't get this, before this i had it running stable on 3.6 ghz and now i can't even go up to 3.4 because the multiplier won't let me and otherwise the ram frequency gets over 1600.

 

As you can guess I am not an overclocking expert but i also had my previous e8400 running at 3.6 so I am not totally new to this and i've prepared myself for it by watching videos and reading stuff but i don't understand what is happening right now, If i use f5 to go back to the default setting it still does the same.

[Samskip]

I don't think that you were able to reach 4GHz with only adjusting the multiplier. You baseclock must have been 4000/21 = 190, instead of the regular 133. You can lower the memory multiplier so that your ram won't exceed 1600mhz.

[Aseliot]

Well despite my limited knowledge on the subject I use Realtemp 3.7 and HWinfo and CPUID and it really was 4ghz with a multiplier of 21. They all displayed the same values. But okay i will try lowering the memory multiplier as you said.