Hi there,

Last night I managed to (finally) OC my Q6600 to 3ghz (9 x 333 [4:5 ratio]).
I also managed to run Prime95 for a little over an hour with no errors.
Woohoo.

Now before I ran P95 for that hour my NB overheated and my PC shut itself down.
So I went into the BIOS and lowered the NB Voltage by 3-5 increments (from 1.18 down to 1.144)
and I didn't get any shutdowns or anything when running P95.

I want to know if these voltage levels seem o.k to you guys:

CPU: 1.32
DRAM: 2.110 (2x 2gb Corsair Dominator 4-4-4-12)
NB: 1.151
SB 1.1: 1.111
SB 1.5: 1.500
FSB Term.: 1.396
DRAM VTT: 1.052
CPU PLL: 1.680

I'm a little edgy over these readings due to the fact that my original CPU PLL was 1.535 and my FSB Termination was 1.204. If I try lowering these 2 values will it have a large impact on my system stability?

Also what's the general rule for modifying RAM performance? Is more voltage required for more MHz or is less voltage required for tighter timings?

Thanks for any help in advance.

EDIT:

I forgot to mention that I am using a P45 Maximus II Formula mobo.

EDIT 2:

I manged to get my CPU to 3.2ghz (8 x 400) to get a 1:1 ratio, however, it is pretty unstable now.
To get my comp to run P95 for 1.5 hours I had to greatly increase some voltages and I am now extremely edgy over them.

Before increasing these voltage levels I was only able to run P95 for around 5 - 10 mins.
During these tests I got many blue screens.

Despite the fact that I think my voltage levels are massive, my CPU is actually not getting over 60c when running a torture test, which is good.

Can anyone give me some info here because I've heard of other people running their Q6600s stable on 1.3v or less and mine is not even though it's at over 1.4...

Every chip is different so don't worry about what other people can do. Anything under 1.55V and you should be fine. 1.5V or less is the ideal mark though.

maybe drop the multiplier to 7.5 and 400FSB so that's 3.0GHz?

select the lowest possible voltage for all component(apart from vcore which you need to set to VID value) then start your OC from there and increase each of them one by one little by little until you are stable then further increase you FSB and up the voltage accordingly when you see instability.

what do you need to adjust the voltage on first when overclocking? cpu vcore? fsb voltage? NB voltage?

start with Vcore then FSB then NB and lastly MCH

what about if your cpu speed isnt changing? eg 6 multiplier 400fsb with a Q6600 is still at stock SPEED just different multiplier and fsb... does that mean vcore stays the same but you up the fsb cos its gone from 266 to 400? and what exactly is the MCH...

if the cpu speed stayed the same then you just need to up the dsb/nb/mch because parts other then the CPU is being overclocked.

thats the theory BUT there might need a slight bump in vcore to maintain stability.

MCH stands for Memory Controller Hub which is where the Memory and CPU connected in the NB.