Baffled...

ricardomax · 5 Nov 2009 at 08:58

Hi - I've got a wierd problem which I can't quite work out... I've oc'd my c2d e7500 from 266mhz bus speed to 340. All stable.

But when I load up cpu-z it says the bus speed is 300mhz!! It seems to register it as 340 if I go into the bios when booting to confirm the 340 value (it's there already, I don't change it) but if I just boot straight to windows it usually (though not always!) says 300!!

Is cpu-z wrong? How can the pc boot at a different bus speed from what the bios says?? :confused:

ricardomax · 5 Nov 2009 at 20:55

Speed step is turned off in bios, and load seems to make no difference - tested with orthos and prime95.

Sometimes it boots at 340 bus speed, other times at 300... I have no idea why!!!!! :confused:

ricardomax · 5 Nov 2009 at 22:07

Yep... c1e, spread spectrum too...

ricardomax · 5 Nov 2009 at 22:13

Oh and mobo is asus p5b-e plus. Ram is oc'd very slightly (to 850mhz instead of 800) at a 4:5 ratio - could that have anything to do with it?? :mad:

ricardomax · 6 Nov 2009 at 00:00

Yer... windows seems to agree with cpu-z over the cpu speed so maybe some odd bios error...