SamFisher199
Airwhore
+40|6283|Netherlands
First my setup:

ASUS P6T mobo with latest BIOS version
Core i7 920 (C0 stepping) cpu with Scythe Mugen II cooler
ASUS GTX275 graphics card
Tri-channel (3x 2 Gb) 6 Gb memory, 1600 Mhz

Running on W7 64 bit (7600 RTM)

So, when my BIOS is at default settings, my pc is stable. But as soon as I overclock just  a bit my pc crashes (crash, to be exact, it blue-screens and show this message: ' a clock interrupt was not received on a secondary processor within the allocated time interval')  on prime 95 within a minute or 2.
One of the settings I used in BIOS:
All default, only things changed:
CPU ratio = 20.0 x
BCLK freq. = 150.0 Mhz

It crashes on prime 95 within 2 mins


Other setup, which I copied from

http://www.xbitlabs.com/misc/picture/?s … pg&1=1

Crashes within just seconds

All the time I monitor the CPU temp. and it always stays below 70 degrees C.
The default clock is good enough, but I know for sure that I should be able to OC this CPU to at least 3.8 Ghz with this cooler installed. So far I don't really have any idea why this is happening, anyone have any idea what is causing this?

I have googled for a while, but I haven't found anything relevant...
GC_PaNzerFIN
Work and study @ Technical Uni
+528|6384|Finland

More IOH voltage.


1.264Vcore
QPI 1.3V
IOH 1.14
CPU PLL 1.8V

ALSO CHECK YOUR RAM LATENCY AND PUT IT MANUALLY TO RIGHT SETTINGS.

Oh and 181 BCLK first

e: you can use 21x multi with new BIOS, use it. 21 x 171

Last edited by GC_PaNzerFIN (2009-08-05 12:28:01)

3930K | H100i | RIVF | 16GB DDR3 | GTX 480 | AX750 | 800D | 512GB SSD | 3TB HDD | Xonar DX | W8
SamFisher199
Airwhore
+40|6283|Netherlands
Works ran prime95 for 25 mins, no problems, gonna up it to 3.8 and keep it that way. Btw temperature remained below/around 70 all the time and went to 50 within 2 secs after i stopped prime 95, awesome Thx
GC_PaNzerFIN
Work and study @ Technical Uni
+528|6384|Finland

NP. You want to know why you had problems?

You are probably used that more voltage, more stability. But in fact with i7 too much voltage can cause BSODs. 
3930K | H100i | RIVF | 16GB DDR3 | GTX 480 | AX750 | 800D | 512GB SSD | 3TB HDD | Xonar DX | W8

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