PCI-Express Frequency = High CPU Usage

[AnthraxXx]

Hi everyone,

I've had some troubles overclocking on this computer. Whenever I change the PCI-Express Frequencies from AUTO to 100, my CPU Usage stays in the 40's, even though no programs are running and I'm idling.

If I set it back to AUTO, I get 0% Usage and 99% on my SIP 10 seconds after logging in, which is normal + good.

I searched around and I only found 1 other person who had this problem, and he did not get a solution.
http://forums.tweaktown.com/f13/pci-express-frequency-28808/

So I was wondering if anyone had any sort of idea as to a solution. I am 99% sure it is just my PCI Express Frequency that is causing it, as I changed all other settings and it did not affect it my CPU usage.

I disabled C1E and EIST and it lowered my CPU usage from 40's to 30's, but that's not what I wanted.

I want to get this running @ 4Ghz but I'm limited by my PCI Express as I don't want to have it on AUTO for obvious reasons...

Specs:
E8400 E0 Stepping
2x1GB Corsair Dominators DDR2 1066mhz
Sapphire HD 4870
Gigabyte X48-DS4 (F3b Bios)
Corsair TX-750 (750W)

I have Win XP Pro SP3 + Win7 RC 7227 in dual boot, and the problem occurs in both.

Please and thanks

 

[kingkingyyk3]

huh? I have my PCI-Express in 100MHz, nothing goes wrong.

 

[AnthraxXx]

huh? I have my PCI-Express in 100MHz, nothing goes wrong.

-.- Which is why I posted this because it's not supposed to be like this......

 

[tom_mai78101]

Must be a conflict with something else. Can you post anything that goes with your PCI-Express card slots?

 

[AnthraxXx]

Not PCI-E but I have a Wireless Adaptor in one of my spare PCI 'creme' coloured slots.

I suppose I could try removing/disabling it for now and see if it does anything, but this'll have to wait until this afternoon as I have 2 exams today.

I also have 2 HDD's, 1x1TB and 1x250GB, not in Raid. I heard that HDD's are controlled by the PCI Bus or something, so that might help as well.

 

[kingkingyyk3]

I also have 2 HDD's, 1x1TB and 1x250GB, not in Raid. I heard that HDD's are controlled by the PCI Bus or something, so that might help as well.
They are controlled by chipset (SATA).

 

[AnthraxXx]

I also have 2 HDD's, 1x1TB and 1x250GB, not in Raid. I heard that HDD's are controlled by the PCI Bus or something, so that might help as well.
They are controlled by chipset (SATA).

Ok sorry, just to clarify I meant this (From another website):

Overclocking the PCI-e bus will also overclock the standard PCI bus & that *may* cause data corruption on your HDD(s), problems with PCI devices, onboard sound, etc.

The PCI-e frequency should be locked at 100MHz. But if you insist on experimenting, limit the PCI-e overclock to a max 112MHz...that will limit the PCI overclock to 37.33MHz, which is generally considered to be the safe max.

 

[kingkingyyk3]

As I know, this is the case of motherboards.

 

[AnthraxXx]

Okay, just flashed back to an older BIOS (f2) and the problem is still here. Gonna reflash back to f3b...

Other people with this board + cpu can overclock with no troubles, so I guess I probably got a faulty one. Damn.

EDIT: Problem no longer occurs in Windows 7, I'm probably going to reinstall XP.