E8400 Air cooling (4.5g 1.328V, 4.6g 1.4V, 4.7g 1.488V)

[begrip]

hmm isnt these cpus read wrong temp with coretemp you tried realtemp? i needed to change bios to get the right temp, when i did got a E8400 ^^

[aoch88]

I am amazed erickwok, my E8400 needs 1.36 V for 3.8 GHz and I can't get it stable at 4 GHz with below 1.4 V. Right now I'm not willing to go above, unless somebody can convince me that it's ok to do so. Been having so many problems lately that I crave stability.

I guess it's the chip? I do 4Ghz 502 x 8 stable @ 1.4V (BIOS settings)

[stephen23]

Hi Eirc, here is mine!

[erickwok]

Hi Eirc, here is mine!

same chip but different voltage at 4G

may be the different between commando and P5K Premium

I tried bios 0404 and 0504 in P5K Premium

0504 got serious Vdrop and unstable voltage due testing

thus it is better to use 0404 for 45nm chip

[redratamd]

This is mine E8400 Box Q750A151
Waterchill liquid @-20°C CPU @8°C

http://valid.x86-secret.com/show_oc.php?id=348900
http://img142.imageshack.us/img142/1699/cpu5190yu8.png

In the bios.
Strap :333
VPLL : 1.50V
VFSB :1.48V
VNB : 1.61V
VDIMM :2.4V
Vcore : 1.58V Asus

I must to find the good settings .
I do 5085MHz and 570MHz of FSB on P35-DS4 and DFI P965-S.
I try on this week on a Blood Iron.
On the future ,i hope pass it on DI or Cascade or LN2.
I do all bench now

[rob[GL]]

[rob[GL]]

I am just getting started with new parts for testing... So many people afraid of 1.4v and not sure why?

Temps seem very fine to me! Under normal day-to-day use and gaming;

Idle @ 40c
Load @ 60c

As you see, 72c is max with prime95, and test did run for 24 hours no problems.

I suppose I will go back into bios and drop more volts, see how low I can on volts and keep stable...



Did I mention this is on stock intel box cooler?

[Mykou]

same chip but different voltage at 4G

may be the different between commando and P5K Premium

I tried bios 0404 and 0504 in P5K Premium

0504 got serious Vdrop and unstable voltage due testing

thus it is better to use 0404 for 45nm chip

Hi eric

I too own P5K premium bios 504 actually , did you test max fsb yet ?

I just success 540 max fsb with 504 bios ( my xeon did same with P5KC bios 903 RMA ) air cooling TRUE 120

I'd like to know max fsb with bios 404 and if bios settings same as 504 .

Could you please give me yours to compare ?

Regards

mykou

that is one hot CPU

are you sure that is the REAL vcore
have you measured it with a DMM as your idle temps are scary high for the vcore used


what were the ambient temps???
with that sort of vcore i'm sure you could probably get the chip to do 4.8 or even 4.9 1M runs

max FSB?

Hi dinos

Maybe I'm wrong , but I noticed most of chips with lower vid than others are getting pretty hot as my xeon E3110

Q807 which vid is 1.07 ( eric 's lower too 1.06 ) and temps on core were around 72° ( core temp 0.97 ) priming 4ghz small ffts ( +4h) with TRUE 120 and only needed 1.20v load .

my xeon Q746 with vid 1.125 has max temp 10° lower with same conditions and cooling .

Maybe my brain's working too hard

cheers

mykou

[erickwok]

Hi Mykou

When using bios 0504, voltage requires 0.01V more to run prime95 (see attached photos)

the max FSB of my E8400 is about 530 using P5K Premium

[mrcape]

Q745A576 - some results, but I don't think this is extreme overclocking, just simple air. I do think that this will be an excellent chip for extreme overclocking when I finally get the pots.

[Hor$eman]

On air, 31c idle, 54c Max load at 4.05 (1800) with bios set at 1.4250v (1.29v actual), no problems.
PLL 1.58
VTT 1.23

[Mykou]

Hi Mykou

When using bios 0504, voltage requires 0.01V more to run prime95 (see attached photos)

the max FSB of my E8400 is about 530 using P5K Premium

thanks for reply

Maybe I will give a try so , do you confirm when using 404 there is no more 0.5 multi ?

Q745A576 - some results, but I don't think this is extreme overclocking, just simple air. I do think that this will be an excellent chip for extreme overclocking when I finally get the pots.

yes it seems to have lot of potential like my former Q807A091 vid 1.07

4 ghz priming with 1.20v load

[Nordling]

LOL
My new E8400 =) 1,176V 4Пря

[TheKarmakazi]

Some time ago I tested one E8400, about 4GHz, 1.3v and 102'C . That was hot one

WOW thats a hottie!

[TheKarmakazi]

Sorry for double post...

Very nice voltage/clock there Nordling!

[erickwok]

thanks for reply

Maybe I will give a try so , do you confirm when using 404 there is no more 0.5 multi ?



yes it seems to have lot of potential like my former Q807A091 vid 1.07

4 ghz priming with 1.20v load

Hi MyKou

I remember there are also x6.5, x7.5, x8.5 available in 0404 bios

[erickwok]

LOL
My new E8400 =) 1,176V 4Пря

Hi Nordling


after updating another new bios 0612, here :

ftp://ftp.asus.com/pub/ASUS/mb/socke...emium-0612.zip


it seems more stable under low voltage ........... 4G at 1.16V

passed 1m, 4m, 8m and 16m superpi

[mrcape]

Nordling, what batch, that looks good.

[erickwok]

4G at 1.20V prime95

[EXPANDER]

e8400 1.26 Vcore 4308 Mhz Air cooler

[Mykou]

e8400 1.26 Vcore 4308 Mhz Air cooler

sounds promising , could you prime it with such voltage ?

4G at 1.20V prime95

so you confirm you got lower volts priming with bios 602 over 404/504 with same other bios settings though ?

[Garrett]

Nordling what's the batch?
And here I am with my e8500 that needs 1.28v for 4ghz... omg...

[stephen23]

my Q806

CPU Volt=Auto(1.496V in windows)
Mem Volt=1.9V
VTT FSB Volt=1.45
NB Volt=1.75V


600FSB wil give me blue screen while windows finish loading..................will setFSB help?

[erickwok]

sounds promising , could you prime it with such voltage ?



so you confirm you got lower volts priming with bios 602 over 404/504 with same other bios settings though ?

Hi Mykou

I can say 0602 bios keep stable voltage level than the other

It is very important during running prime95 and superpi

Why not change 0602 and try a test ?

[erickwok]

my Q806

CPU Volt=Auto(1.496V in windows)
Mem Volt=1.9V
VTT FSB Volt=1.45
NB Volt=1.75V


600FSB wil give me blue screen while windows finish loading..................will setFSB help?

how about 600x6 ??

and have you tried OCQQ watercooling set ??
http://bbs.ocqq.com/viewthread.php?tid=19103