Post up your undervolting results for your CPU!

I was trawling the forums and web for info regarding another processor and whether or not it could be undervolted well compared with my own but couldn't find anything so it dawned on me I could compile a list on here

Undervolting is a great activity that is very simple to do and it will not only save you money in terms of your electricity bill but also will extend the life of your laptop components. Another benefit of undervolting is that it allows you to run powerful processors that might usually create too much heat and use too much power to be stable without an undervolt.

I hope this list that I want to compile will help people chose potential CPU's they might feel worth upgrading to in that it will help them answer questions concerning how well binned a chip really is.

Please post your laptop make and model, CPU name and your undervolting results at both stock and even at an OC. Personally I am very interested in results with the QX9650 or X3380 if anyone has those processors but any processor (quad core,dual core,single core and AMD) will do to help others.

For those unfamiliar with undervolting this thread should get you under way : http://forum.notebookreview.com/har...arket-upgrades/235824-undervolting-guide.html

I will start with my own:


Quad core

Asus C90P : Q9650 EO stepping stock voltage 1.15V
Undervolted : 3ghz : 1.0375V, 3.3ghz : 1.1V

AW M17 : Q9000 : undervolted : 1.05V


Extreme Edition CPU's

Gateway P-7805u : X9100 : 3.2ghz stock : undervolted : 1.1750

Sager NP 9262 : QX9650 C1 stepping
Undervolted : 3ghz : 1.1750V , 3.3ghz : 1.250V

Low power

HP DM3T : SP9300 : undervolted at stock clocks : 0.925V


Dual core

Asus G50vt-x1 : C2D E8335 SLGEB, EO, 2.93ghz : undervolted : stock 1.1V, OC 3.5ghz : 1.2125V

C2D T9900 : undervolted at stock clocks : 1.250V --> 1,188V

Hp Pavilion Dv5t : C2D T9400 : undervolted at stock clocks : 1.25V --> 1.1125V

HP 8510p : C2D T8300 : undervolted at stock clocks : 0.9750V

Dell Inspiron 1520 : T7500 : stock 2.2ghz 1.2375V : undervolted 1.0125V (10-15C drop)

C2D T7500 : undervolted : 1.025V

C2D T7300 : undervolted at stock clocks : 1.2V --> 0.95V

Acer 6920G-6428 : T5550 : undervolted at stock clocks : 0.9875V

Acer Aspire 5551 : C2D T2250 1.73ghz : undervolted at stock clocks : 1.0125V

Dell SXPS 1640 : C2D P8700 2.53ghz : undervolted at stock clocks : 0.9750V

Acer Aspire 6935G : C2D P8600 2.4ghz : undervolted at stock clocks : 0.95V

Asus G50VT-x1 : C2D P8400 2.26ghz : undervolted at OC 2.53ghz : 1.1375 --> 1.0375V

 

Undervolting my SP9300 to .925v lowered my idle temps by ~5c and max temps by ~15c

 

My Intel E8335 is undervolted to 1.100v at stock clocks (12-15C cooler) and 1.2125v at a 3.5GHz OC (~2C cooler).

EDIT: I should add my E8335 is an SLGEB, E0 stepping and 2.93GHz stock. There exist other E8335s of different clockspeeds.

 

Nice info guys! Keep it coming

 

See my sig.

 

Core 2 Duo T8300 @2.4GHz 0.9750V

 

C2D T7300 @ 2Ghz from stock 1.2V to 0.95V. Max temp drops from ~70C to ~60C when gaming.

HPcompaq 8510p

 

When I had my T9900 it was able to stably underclock--harsh session of IBT--at 1.188v from stock of 1.250v @ 3.06 GHz.

 

Nice undervolts! Don't forget to state you laptop make and model if it isn't in your sig.

 

C2D P8600 2.4GHz Undervolted @0.95V

 

Core Duo T2250 [email protected], Acer Aspire 5551
Core 2 Duo P8700 [email protected], Dell SXPS 1640

 

P8400 2.26Ghz default 1.1375v overclocked to 2.53Ghz/1.075v, it runs even cooler than at default clock/voltage.

 

HP 8510p.

 

Former Hp Pavilion Dv5t... Undervolted T9400 from 1.25V to 1.1125V...

 

Thanks folks for the new postings! Keep em coming. Interesting that the P8700 can undervolt at stock 2.53ghz to less than a volt but a P8400 OC to that same clock cannot match it in undervolting. Shows that the P8700 is binned higher.

Also interested in i3, i5, and i7 chips too

 

Just so you know, the SP9300 is actually a full voltage processor but its built on ULV thickness. (Essentially a thinner P8400)

 

x9100 3.2 GHz @ 1.1750............

 

u can't undervolt the i series chips..

 

@King of Interns, T2250 is just Core Duo, not Core 2 Duo...
As for the P8700, it could run at Dual IDA @2.66GHz but need to push the voltage to 1.025V..

 

I didn't realise that. Thanks for the info Sean

 

Dell Inspiron 1520 with Core 2 Duo T7500, stock 2.2 GHz. Stock voltage is 1.2375 V eek . Undervolted to 1.0125 V. Temperatures dropped by 15-20ºС relative to stock voltage. Also provides a nice boost in heavy-load battery life (as to be expected with a 33% drop in power consumption before considering leakage).

When overclocked to 2.4 GHz (dual IDA), I routinely run 1.075V, but haven't determined what the stable minimum is. 1.05 seems to be stable. 1.0125 is definitely not stable. Even at 2.4/1.075, temps are lower than stock clock/voltage by at least 5-10ºС.

By the way, you might want to order the CPUs with quad/dual core, maybe by model number or clock speed. If people keep submitting results it's going to get messy without some sort of ordering.

 

Yeah I intend to do so when I have a little time. Probably tonight

That is a ridic high stock voltage there Apollo. Then again 1.15V was overkill stock clock for my Q9650 too!

 

Any more results? Some quad users chipping in would be handy!

 

CPU in signature

 

i got my q9000 down to 1.05 and runing stable at stock clock but that does not change much in batterie life on my laptop nothing seem to help it .....

 

well my t7500 uved to 1.025v from 1.125v
Decreased m load temps by about 10-15c
Increased my battery runtime by 20mins!

 

i certainly would love to undervolt.. its 50C on my 720qm idle which is too high...

 

Sucks that Intel have taken all the fun out of their new chips. No undervolting and automatic overclocking how boring lol

 

Forgot to add my undervolting result for the T7200 in my T60, undervolted to 0.975v from 1.125v.

Also the information of undervolting/overclocking p8400 in your first post is wrong, it's running at 2.53Ghz/1.075v, not 1.035v(I wish I could run it at that low voltage), the default voltage for p8400 2.26ghz is 1.1375v, just want to point it out.

 

HP DV7 Pavillion 3020SA

AMD M520
2300mhz 1.2125v ---> 1.1v
2100mhz 1.1625v---->changed to 600mhz
1500mhz 1.0250v --->0.9v
1100mhz 0.9250v --->0.8375v
800mhz 0.8125v --->0.7375v
600mhz 0.6875v

 

swapping 2100(P1) to 600? explain please

I'm using K10STAT

HP DV7 Pavillion 3160US (AMD M620)

-------------V(Stock) V(lowered)

P0 2500 mhz 1.2000 1.1000
P1 2300 mhz 1.1500 1.0500
P2 1600 mhz 1.0125 1.0000
P3 1100 mhz 0.9125 0.9000
P4 0800 mhz 0.8000 0.7375

 

In practice i turned 2100mhz into 1500mhz, 1500 in 1100, 1100 in 800
it was 800mhz that went to 600mhz but text formatting that above would appear a mess.

The 600mhz was achieved with a FID of 8 and DID of 2.

I did this because i discovered 600mhz would be enough when i am just reading a webpage or writting a text. Probably even less.

 

Just had a time to make a sustained test with a rendering. The undervolting from 1.21v to 1.1v at 2.3ghz slashed 5ºC to max temps w/ 100%CPU. 70.5ºC reduced to 65.5ºC

 

well has anyone figured out a way to undervolt mobile i7