Asus P5B-D & 3x E8400 @ 590fsb dual 32M superpi stable. One off freak result?

[davemelb]

Hi everyone,

I am David from www.overclockers.com.au. I am very much a novice overclocker with an Asus P5B Deluxe Rev 1.04G + pencil vmod. Now I seek your help and comments on the situation below:

Recently THREE different retail E8400's was put in my motherboard with, what I now realise astonishing results. Astonishing because they did dual 32M superpi stable @590fsb on air in the middle of the warm Australian summer.

The complicated part:
Two of these CPUs was sent to dino22 to test, however, dino22 couldn't reproduce anywhere near the FSB I was getting, even with the same motherboard as I have, using the same BIOS and BIOS settings. He also tried some of the best and latest motherboards in his posession, but no go.

The third CPU was sent to another person, which also failed to replicated my results. He informed me he uses an Asus P5K deluxe.

So here I am, scratching me head and confused. But I post the screen dumps and validations of those tests below for your viewing:


CPU1. Q744A.

590FSB dual superpi 32M. Begin of test.
http://img301.imageshack.us/my.php?i...sbstartaq4.jpg

590FSB dual superpi 32M. Middle of test.
http://img504.imageshack.us/my.php?i...0fsbmidep7.jpg

590FSB dual superpi 32M. End of test.
http://img168.imageshack.us/my.php?i...0fsbendop5.jpg

CPUz Validation:
http://valid.x86-secret.com/show_oc.php?id=296598

600FSB dual superpi 32M. Begin of test.
http://img150.imageshack.us/my.php?i...sbstartrn4.jpg

600FSB dual superpi 32M. Middle of of test. Shortly after this, Windows frozed at the 3/4 stage, test uncompleted.
http://img110.imageshack.us/my.php?i...0fsbmidgw2.jpg

CPUz Validation:
http://valid.x86-secret.com/show_oc.php?id=296599


CPU2. Q748A.

594FSB dual superpi 32M. Start of of test.
http://img340.imageshack.us/my.php?i...sbstartff1.jpg

594FSB dual superpi 32M. Middle of of test.
http://img237.imageshack.us/my.php?i...4fsbmidmf1.jpg

594FSB dual superpi 32M. End of of test.
http://img175.imageshack.us/my.php?i...4fsbenddd7.jpg

CPUz validation:
http://valid.x86-secret.com/show_oc.php?id=297368

Did no try 32M SuperPi test at 600FSB. But here's a validation at 600FSB on the second CPU.
http://valid.x86-secret.com/show_oc.php?id=298246

This is the result of the third CPU:
Single 32m superpi, 590fsb.
http://img443.imageshack.us/my.php?image=590pihz4.jpg

Dual 32M superpi, 590fsb. Half-way stage.
http://img413.imageshack.us/my.php?i...ay590pihe1.jpg

Dual 32M superpi, 590fsb. Completed stage.
http://img413.imageshack.us/my.php?i...te590piom8.jpg

Interesting to note: The three E8400's seem to max out at around 590 - 600 fsb.

My system:
P5B-D Wifi Rev 1.04G,BIOS 1226. Pencil vdroop mod.
2GB Crucial Ballistix PC8500 RAM
Ultra 120 extreme cooling + 120mm fan.

BIOS settings:

BIOS settings:
FSB = 400 - then SetFSB in Windows to around 590 - 600.
PCI-e = 100
33.33MHz
Sprectrum = Disabled
vcore = a high value to withstand the test, usually round 1.5v
vdimm = 2.25v
FSB termination = 1.45v
NB = 1.65v
SB = 1.8v
ICH = 1.2v

Diabled everything under "CPU Configuration", except multiplier.

RAM timings = loose, 5,5,5,15, 5, 35/42, 10,10,10,0
Static Read = Auto

I am happy to upload the CPUz validation files saved on the HDD for you people to analyse if they wish.

Can anyone on here with an Asus P5B-D please test your board with a dualcore 45mm to see if you can replicate my results? If you can, would you please also test it on a P35 or x38 or x48?