I doubt underclocking harms the CPU, but if u go too low, u wont have a stable uc/u volt

under volt my e8400, running at stock 3ghz @ 0.976v, idle 32c, load 32c, fanless air-con room, non air-con idle 34c, load 39c
damn satisfy since no need pay so much to tnb

This post has been edited by hengmy: Jan 16 2009, 05:38 PM

Mine must be costing a lot of tariffs then, at 1.58v

Im also under volt, just slightly under volt.
Now running 1.28v on vCore.

my QX9650 on power saving mode undervolt to 0.9276

EIST & C1E turned off and i undervolt my Q9650 to 1.06v load stable

with EIST & C1E disabled = proc can be further undervolted?

u shouldn't disable them. Undervolt is not related anyway but if disable them the frequency increase while idle which consume more electric and generate more heat.
@melvyn
if turn off hdd can download? coz the portable/laptop configuration switch off hdd after 30min right?

wah dug up an old thread, then saw my old post...... >1yr now only i reply again

im using S1283 HSF edi (since last yr i think) so when i was replacing my old intel stock HSF found out i din not press d push pins hard enuff onto d motherbored.....

so dat crazy temp was bcoz of my noobness. if any newbies reading this, pls do take note n dun b so noob like me,


now running 3.2gHz@400fsb /1.26vcore (undervolting but overclocking proc) temp max only 66C running orthos

Lowest i can go with my mobo... in terms of volt.

the best i could do it. IBT 16 tests stable.

May i know,what kind of software u guys use to downlocking/undervolting?

You may reduce the voltage/clock speed settings accordingly in your BIOS and use stability software to test.

I think Fyonne is via bios undervolting. Mine is a combination of bios and windows. Get windows to force speedstep and never let the proc run at 100% capability.

Not sure if it works the same for AMD's technology for power saving.

@Fyonne... wahhh 0.996v... play around with gtls maybe can get it lower abit more?

This post has been edited by cyloh: Mar 29 2009, 07:29 PM

But isnt it troublesome?
Need to restart to set everytime want a powersaving settings.Is there any software to set?
AMD technology is the same,but my mobo doesnt allow it to b enable if im overclocking - -

Nah, in windows 7 it is saved and locked that way. If you want to change the amount of processor % on the fly no problem also.

But since you cannot enable cool&quiet, then I don't know if the OS can help you clock down the clock/volts....

enlight me with it. im still pretty newbie on tweaking stuff other than vCore.

depend on wat mobo u using, my guess is now most mobo came with their own OC program. i usually adjust initial setting on BIOS, n test n set the optimum one slowly thru windows (in this case, im using Gigabyte EasyTune6 that came with my mobo)

In order to use EIST, you have to enable it in the BIOS and turn it on in your OS: http://www.intel.com/support/processors/sb/CS-028855.htm

In your bios should have GTL voltage settings(that depends on what mobo also, not all will have).
Should have GTL1 and GTL2 usually. Set both to 63. Or to the lowest u can set I guess.

Hey if you downclock lower than 3ghz, who knows? you might be able to run your chip 0.8v on 2.5ghz

Anyone knows for a quad core, if you disable Core Multi-processing in bios(become dual core), does it fully shut down
2 cores and therefore saving 50% watts?

When my main rig proc is idling, it runs at 401x6=2.4ghz at 1.03v. My intel board doesnt allow any undervolting beyond the speedstep limits

On my amd rig, at idle it runs at 1.2ghz at 0.8v. At this low voltage state, i've actually locked the multiplier n voltage & stress tested it without the fan running. The proc remained below 60C even after an hour