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Has anyone undervolted their Q6600?

Stonedofmoo

Stonedofmoo

Stonedofmoo

Soldato
Joined
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Portsmouth
As above?
I can undervolt mine 2 or 3 notches and it will boot into windows and number crunch prime95 for as long as I choose...

BUT... it will not turn on with this setting. I.e. I can set the voltage in the BIOS and it will reset and boot, but soon as I turn the PC off thats it, no more booting until I reset the cmos.

Seems weird, anyone else had this?

My board allows me to set bios profiles so I've set one up for my overclocked 3.5 gaming setting, and now I want to set one up for daily desktop use that runs at stock speeds and minimum voltage.
 
VID on my old Q6600 was 1.2625v (from memory!) and would boot at stock and run quite happily at primeload @ around 1.20v.. 1.2625v would get 3.2ghz ish
 
Under-what-ing the chip? Are you crazy? I can understand people running stock volts and ocing as far as possible, but electricity isn't that expensive that you need to save a couple of watts by effectively underclocking a CPU.

Just sold a 3.6Ghz @ 1.3v chip on here. Methinks I should have asked for more for it!
 
Richie P said:
Under-what-ing the chip? Are you crazy? I can understand people running stock volts and ocing as far as possible, but electricity isn't that expensive that you need to save a couple of watts by effectively underclocking a CPU.

Just sold a 3.6Ghz @ 1.3v chip on here. Methinks I should have asked for more for it!
Click to expand...
I also have had a go at under volting a chip an E8600 tho, used to sit @ 5ghz
water cooled. Never noticed any gains in games or general day to day tasks, so took it back to 4.3ghz which it was 24/7 stable on auto vcore.

That got me thinking and I set it to just 4ghz, and kept backing off vcore until it was no longer stable. End result 24/7 stable at a vcore of 1.136v in windows the vid of chip is 1.1875v.

So a mild over clock at less than vid, I would not call that an under clock.
 
Runs cooler, extends the life of the processor & wastes less electricity to do the same job. Especially important at idle if you leave your PC on for long periods of time.
 
No, your motherboard might but thats not a function of speedstep. Speedstep purely decreases the clock speed when idle. I'm using that already.

Can we keep the topic on track please :)
 
Last edited:
Well I've managed to undervolt my chip and I've setup two profiles in my BIOS. One at stock speeds but undervolted for daily uses, and another with my overclocked settings. My Q6600's default vid is 1.265v but I manged to undervolt mine to 1.025v and still be Prime95 stable.

With my new profile my setup is:
My PC is as follows
Q6600 @ stock speed but 1.025v in the BIOS
8Gb RAM
MSI P45 Neo2 Motherboard
Asus 8800GT gfx @ stock
3x WD RE3 250Gb drives in RAID0
1x Samsung 1Tb drive
Creative XFi Fatality with drive bay
1x 200mm, 4x 120mm LED case fans
1x DVD-RW
Hiper 630w PSU (recent 85% efficient model)

All that idles at 136w saving about 12w of power from standard VID and making it run much cooler. Otherwise it is exactly the same, still Prime95 stable etc.

CPUZ.jpg


and check out the core temps. Thats while running Prime95!!

HWMonitor.jpg


Damn good for a 'hot' running Q6600 :D
 
My board undervolts mine for me with some bad vdrop, Any idea what this chip might do with a decent board?

Edit: And some decent cooling.

NewPicture.jpg
 
hmm funny you say that... just dug out an image of load temps when I set the machine up. Same overclock and volts...

Desktop2.jpg


What could be causing this increase in temps? Possibly time to give it a good clean?
 
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