Safe volts for Q9550

Slinkie · 16 Jan 2009 at 17:48

Hi Folks,

I am in the process of overclocking my new Q9550 but am a bit unsure of the voltages I should use.

Currently it is running at 473x8.5
CPU volts are 1.248 in CPU-Z under prime 95 small FFT load
I have my Northbridge set to 1.3575 and my VVT set to 1.32.

What I did when I first overclocked the chip was just wack all the voltages up to get to 4Ghz and now I am reducing them slowly to get a low voltage and keep the cpu stable.

I'm pretty happy with the temps I am getting at these volts and clocks (the hottest core hasn't gone about 53 and the lowest 48) so I may try push it a bit further buy 470mhz enough I think for day to day running. CPU is currently being cooled in a custom water loop with my GFX card.

What voltages do you use for your Q9550s?

PaulyD · 16 Jan 2009 at 17:57

I believe 1.45 for vcore and 1.4 vtt is the max recommended for 45nm, however i might have got those two mixed up and its the other way around!

toon_mad · 16 Jan 2009 at 17:59

ive read 1.4v on the VTT should not be exceeded too, not sure if that accounts for 65nm as its that i got the info for, on my q6600

vertica · 16 Jan 2009 at 18:17

1.4V on both is generally the reccomended max.

over 4Ghz on that voltage is good! is it stable?

Cob · 16 Jan 2009 at 19:31

1.4v on core and VTT/FSB Term, and 1.6v on the PLL are the recommended max voltages.

Northbridge doesn't matter as it doesn't directly affect the CPU.

gurusan · 16 Jan 2009 at 19:46

intel specs the absolute max as 1.45vcore and 1.45vtt.

However for 24/7 use I'd stick to 1.4ish and below