Core i7/X58 Overclocking Thread

[The-Fox]

does anybody know what the default QPI voltage is?

It depends on the QPI speed, but the range is 1.15v-1.375v according to Intel spec.
If you leave the voltage on auto you will see that the voltage is always within the above range.

woah you ran mem at 221x6 = DDR3-2652 and 221x8 = DDR3-3536 or you mean 3x and 4x mem multipliers ?

Haven't tried much on 8x mem multiplier but tried 6x mem with same 3x1GB HCF0 sticks and

max on 5x mem multiplier i got was 1096mhz 9-9-9-24 for DDR3-2191Mhz 32M pi stable at 1.965v

max on 6x mem multiplier i got was 1049mhz 9-9-9-24 for DDR3-2098Mhz at 1.965v

So could be higher mem multiplier harder to IMC/system ??

Yahh, I mean x3/x4=x6/x8, no way to run DDR3 @ 3xxx mhz
It can be a bit confusing as some people (like me) refer to the DDR (effective) multiplier and some refer to the Speed (Mhz) multiplier (like you).

What I meant to say is that higher CPU speed (not memory multi) causes to achieve lower Ram speeds.
You would have hard time finding that as your ram speeds are way too high anyway

For instance, try running CPU multi 18/19 and try to max out your RAM speed.
Then, try to achieve the same ram speed at higher multi (20/21) which will result in higher CPU speeds.
IMO, where the CPU is getting maxxed out, your IMC is having problems running high ram speed.