X3350 (q9450) max OC thread!

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Xenozx

2[H]4U
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Jun 16, 2004
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OK, I am attempting to go for a max overclock on my X3350 quad core CPU. This is the Xeon version of the Q9450. So far I have managed to get it up to 3.7ghz, and thats pretty stable. I want 3.8.

let me lay down my specs/info.

overclock.jpg


1.425v Vcore
(cpu-z reports 1.40)
(cpu-z on full load 1.35v)

1.4v FSB
1.5v SPP

GTLVREF 0/0/0/0 (manually set)

Ram 2.1v

Linked and Sync'd fsb 1850frontsidebus/925memory


questions

1.) Has anyone else gotten close to 3.7 on air on one of these chips? What settings did you use?

2.) GTLvref, I read a few things on this, but for some reason when I set this to 2/3 of my VTT it wont even boot into windows, only way I get stability is to force 0/0/0/0 does this make sense?

3.) what is the max safe voltage for these 45nm chips, am I OK or should I be worried? How bout temps?

4.) and my main question is "WHAT DO I NEED TO DO TO GET TO 3.8 AND OR ABOVE?".
 
oh and in response to your questions.

2) I believe the multiplier (eg. 0.67x on asus boards) is applied to your FSB voltage and the resulting voltage 0.67xVfsb = the Vfsb you want the cpu to see. So if you want the cpu to see a fsb termination voltage of 1.2 you'd do something like: 1.2/0.67 = 1.79. So set Vfsb at 1.79 and GTL ref @ 0.67x.

3) the cpu voltage doesn't really matter too much. the more important voltages to get the thing to boot are NB voltage, FSB voltage, and NB reference.
 
afreak said:
oh and in response to your questions.

2) I believe the multiplier (eg. 0.67x on asus boards) is applied to your FSB voltage and the resulting voltage 0.67xVfsb = the Vfsb you want the cpu to see. So if you want the cpu to see a fsb termination voltage of 1.2 you'd do something like: 1.2/0.67 = 1.79. So set Vfsb at 1.79 and GTL ref @ 0.67x.

3) the cpu voltage doesn't really matter too much. the more important voltages to get the thing to boot are NB voltage, FSB voltage, and NB reference.
Click to expand...

The problem w/ nvidia based boards, is they dont show a voltage, just something like

lane 1 110mv
lane 2 110mv
lane 3 110mv
lane 4 110mv

The 4GHZ was nice man!, unfortunately, my bios limits my FSB voltage to 1.4, and my SPP to 1.55, so I couldnt hit those voltages even if I wanted.
 
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