System won't boot when OC'ed?

[jamiee]

Hey gang,

I think I've got an interesting one for ya...

I recently put togther a new rig (well partially anyway), consisting of a P5W-DH Dlx, Core 2 E6700, and Corsair TWINX2X2048-6400C4 (4-4-4-12) Memory. The PSU is an OCZ Powerstream 600W unit that has come over from my previous Athlon X2 build.

The problem I'm having is that if I overclock past 2.8Ghz (280FSB x 10), my PC literally won't start up. Now I'm used to an overclock failing & Windows not booting, but I've never seen a PC not power up unless either the PSU or power on/off switch were dead.
Generally in order to boot, I need to pull the power plug for a minute or two, plug it back in and then the PC will start up...boot into Windows & act like nothing was wrong. Heck I've easily run at 3.1Ghz and been completely stable after running 10hrs of ORTHOS. But after turning my PC off, it won't turn back on.

Running the PC at stock speed seem's to work just fine and It will turn on every time. So this seems to be overclocking related.

What I can say is that the motherboard is getting power as the green light on the board remains lit at all times.

It could be the PSU but all of it's rails seem fine and look fairly stable. Besides it worked well when hooked up to the A8N-SLI Premium.
(Is there a compatability issue I'm not aware of)?

Anyway, if anyone has any thoughts or has experienced the same, I'd love to hear them


Cheers.

 

[Arcygenical]

This is usally called a "warm boot issue" and is often caused by old motherboard BIOS revisions.

Got the latest BIOS?

My P5B does something wierd over 400FSB. When I turn it on it starts, shuts down, starts, shuts down, starts and boots.... Yeah, it literally tries THREE times to kick it's ass into gear.

This is normal for my BIOS revision and was fixed in a later release. I dont wanna upgrade because my system overclocks so well, but it's something you might want to consider.

Hope this helps.

 

[jamiee]

Thanx Arcygenical,

My board is Rev. 1.02g & came with BIOS 1305.
I've since flashed it to 1407, and yesterday 1503...

Still no go


Btw, I un-installed the P5W's remote control & software just to make sure it wasn't playing havoc with the board,... but this doesn't seem to be the case.