Help with oc'in E8400

Hello,

I need some help/advice when oc'in the E8400 My system specs are:

Asus Striker Extreme 2
E8400 @ 3.9ghz voltage = 1.35-1.41?
4gb xms 3 ddr3 @ 1333mhz 9-9-9-24-2t, 1.7v
Thermalright 120 extreme/artic silver 5 with 2x NFP12 fans
2x 8800gt oc,
areca 1231ml raid controller
4x1tb wdre2gp wd in r5 for data
4x 320gb wdre2 r5 for os.
3x 250gb mx r0 scratch dsk
Zalaman 1000w psu
Windows Vista 64

Ok, so I got to 3.9 with the multi @ 9 and fsb @ 1733 Stable.....

To achieve this I had to set the vcore to 1.362 in the bios but am a little confused??? The bios reads 1.362, cpuz reads 1.28, probe2 reads 1.41 and ai suite reads 1.41....

Temps vary as well using orthis i get 50c full load with speedfan and realtemp but 60-61 with probe2, and ai....

Now I know the max rated vcore is rated at 1.36 and anything over that is supposed to be bad news, so what vcore utility should I trust???

I have tried x8 and x8.5 multi which require the same vcore voltage and have also tried increasing vcore pll, north bridge, south bridge ect which has had no improvement in stability.

Any suggestions

Thanks

CPU-z is the voltage after the vdroop, go by that. Realtemp is your best bet on the temps. As far as the max rated vcore, that's 1.46 for 24/7 use, I'm not sure where you see 1.36, but I run mine at 1.5 in the bios to get an actual 1.44 in CPU-Z which nets me a solid 4.050 Ghz.

*Edit - 4Ghz should be no sweat for ya

OldSkool said:

CPU-z is the voltage after the vdroop, go by that. Realtemp is your best bet on the temps. As far as the max rated vcore, that's 1.46 for 24/7 use, I'm not sure where you see 1.36, but I run mine at 1.5 in the bios to get an actual 1.44 in CPU-Z which nets me a solid 4.050 Ghz.

*Edit - 4Ghz should be no sweat for ya

Click to expand...

Do you reckon I am gettin the vdroop and not v increase like probe2 is reporting on my board? (nforce 790i)

1.36v is the max that intel rate the chip at before it degrades somewhat although, on the retail box it says 1.25v max so i guess there is no real figure to go buy..... anyways......

Did you tweak any other settings like nb/sb vcore pll ect? cause i did really gain any stability dude?

That is your VID, in other words where your chip's base voltage is set. I'll look for Intel's info, but it's actually 1.46v. Using a different Mobo, all I changed was the CPU voltage and bus speed, as well as change the memory ratio. Other than that, nothing.

Vid Ranges:
http://processorfinder.intel.com/details.aspx?sSpec=SLAPL

Max Voltage:
http://forums.extremeoverclocking.com/t285730.html
http://www.csd.dficlub.org/forum/showthread.php?t=5420

I hear Coretemp works pretty well.. it shows all four cores. That is what I'm using, (although that's no validation)....never tried realtemp, so I can't nothing pro or con about it.

DocClock aka MadClocker said:

I hear Coretemp works pretty well.. it shows all four cores. That is what I'm using, (although that's no validation)....never tried realtemp, so I can't nothing pro or con about it.

Click to expand...

He's using a Dual core..... Either way they are almost the same.

RealTemp gives me temps of about 10 degrees lower than CoreTemp. I was freaking out when I first OCd the E8400 and I was getting load CoreTemp temps of 70 degrees.

Should be exactly 10C lower, RealTemp defaults to 95C Tjunction max where as coretemp defaults to 105C Tjunction max with an E8400.

Actual voltage is much lower then what you set in the BIOs, so make sure to compensate for the vdrop and vdroop.

Thats alot of volts for just 3.9GHZ. Are you sure you need that much? I am running 1.18 for 3.85GHZ on my 8400. My vid is 1.1 on this chip.

Vengance_01 said:

Thats alot of volts for just 3.9GHZ. Are you sure you need that much? I am running 1.18 for 3.85GHZ on my 8400. My vid is 1.1 on this chip.

Click to expand...

second that here i run stable 3.9 with 1.3vcore

Enable loadline calibration and CPU-Z will not reflect as much vdroop.