Max voltages

sjcf1

sjcf1

sjcf1

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Hi, Just wondered what the maximum voltages were for the following

DDR2 800mhz memory
A Biostar T45 Motherboard
Q6600 GO stepping CPU

Me and a mate managed to get his Q6600 to 3.9ghz stable with 1.46 vcore. Want to get it to 4ghz stable but I can't seem to get it, the memory is running around 880mhz with the memory timings relaxed slightly, the board's fsb is running at 1773mhz which is above the 1600mhz fsb that the board states.

What could I change to get it stable at 4ghz, its only failing during folding, which is what the PC would be doing, as well as gaming.

Edit, its been cooled by A titan fenrir, cpu doesn't go above 60 degrees during full load.
 
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Vcore wise you should be fine upto 1.55 on a q6600, (1.5 is the common figure often quoted, though many people, myself included go above this), providing off course that the cooling is up to the job. Ram wise, 2.1v is the most common voltage on ddr2, some brands are rated higher, ocz for example allow for overvolting on their memory kits. On the motherboard, the following voltages shouldnt exceed the below for 24/7 use.

cpu pll, 1.6
nb, 1.4
Fsb term/vtt, 1.4
 
thanks for that he'll start clocking it some more then

Edit.

Here are the settings its running at currently, anyone suggest any changes that could be done to get this working at 4. Just getting bluescreens at the moment.

2agkl5j.jpg


280tv2g.jpg
 
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Can you unlink the RAM speed from the FSB (or change ratio), perhaps it's just not liking it?
You could also try lowering the multiplier to check if it's a FSB limit of the board itself (with RAM speed lowered too).
 
Setter - I take it the Vcore is 1.5 or 1.55 under full load? My P45 has massive Vdrop and Vdroop meaning i need to put it on about 1.6V + to be able to get it to 1.55v in idle and 1.5v load.

I'll remember these 3 though, ta

cpu pll, 1.6
nb, 1.4
Fsb term/vtt, 1.4
 
that Q6600 is virtually identical at 3.8 to my old Q6600

here is a screen of mine priming at 4ghz+ should give you an idea on required load voltage

4032.jpg


NB at 1.55v (although that was with 4 sticks on a P35 board)
PLL at 1.6

I think my FSB Term was at around 1.5v

you may need to fiddle with your GRef's

Max vcore I would recommend is 1.55v, max I used for any length of time was 1.6v... and on my P45 poor little CPU was subjected to 1.75v for benching
 
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What are the Vid's of these chips? Must be really low to get 4ghz out of one. Pneumonic - are you on water cooling, 1.544v at load would sent my Q6600 temps rocketing I think
 
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