My overclock won't 'stick'

mrochester · 23 Mar 2008 at 22:52

I'm having a little mess with overclocking my E8200 on an Asus P5K3 Deluxe mobo. In the BIOS I've set the FSB to 400mhz and the CPU Ratio to 8.0. This should give me 3.2Ghz. However, CPU-Z is reporting the multiplier as flitting backwards and forwards between 6 and 8, making the clock speed change contantly from 2.4ghz to 3.2ghz. Since I manually entered a CPU ratio of 8 in the BIOS, the option to turn Intel Speedstep on or off is disabled by defaul, so I assume that it is automatically switched off.

So how do I get it to stay as 8 instead of jumping up and down between 6 and 8?

Thanks,

Michael.

GhostlyPea · 23 Mar 2008 at 23:14

Disable Speedstep and C1est in BIOS.

This question seems to be asked every day....

- Pea0n

mrochester · 23 Mar 2008 at 23:17

Pea0n said:
Disable Speedstep and C1est in BIOS.

This question seems to be asked every day....

- Pea0n

But as soon as I manually enter 8 as the multiplier, the Speedstep option vanishes, so I assume it is already switched off...

GhostlyPea · 23 Mar 2008 at 23:21

Have you disabled C1est as well?

- Pea0n

EDIT: Also try running prime or orthos and watch the multi, see what happens under load.

mrochester · 23 Mar 2008 at 23:24

Pea0n said:
Have you disabled C1est as well?

- Pea0n

EDIT: Also try running prime or orthos and watch the multi, see what happens under load.

I have now, and CPU-Z is still reporting a multi going between 6 and 8.

GhostlyPea · 23 Mar 2008 at 23:40

Hmmm. What did you use to stress the CPU?

- Pea0n

mrochester · 23 Mar 2008 at 23:48

I haven't used anything to stress the CPU yet other than the CustomPc benchmark and various games, all of which it can handle currently well. But I can't be sure whether it is 2.4ghz or 3.2!

GhostlyPea · 23 Mar 2008 at 23:50

Run orthos and CPU-Z at the same time for about 10 mins. watch the multi and see what it does all that time.

- Pea0n