Thread: CPU Underclocks itself (EIST and C1E Disabled)

My CPU core 2 duo e8400@3.0ghz but it shows on post that is runs on 2.4 ghz, it would also show in cpu-z that it runs on 2.4 ghz, i have already turned off EISTS and C1E, I also manually clocked the fsb to 333 multiplier x9 but it would still go back to 2.4ghz, it would take a few reboots to my pc to make it run to 3.0ghz but it would then go back to 2.4ghz

I suspect the PSU to be the culprit because i would sometimes get random hangs and freezes.

But is there any case that a faulty PSU could make a cpu underclock itself? or the CPU itself is faulty

It would also take a few clicks to the power button to turn on my PC

MY rig is:
HEC Winpower 550watts
E8400
galaxy Gtx 260+
2x2gb G.Skill PI DDR2-1100
ASUS P5Q PRO TURBO.

I'd go back and recheck BIOS to make sure your settings are saved on exit. That motherboard powers on in a funny way after saving new BIOS settings or unplugging the PSU and it's the same way with many Asus P5Q motherboards - it's normal. Don't hit the power button twice, just wait about a second or two.

Does it clock to 3 GHz while you’re gaming? If so, then don’t worry about it. It’s a power saving feature.