3 minute POST on cold boot

McGraw

McGraw

McGraw

Soldato
Joined
16 Jan 2006
Posts
3,046
Hi.

My Dad's pc (which I built him) takes about 3 minutes to display CPU details on a cold boot. The screen comes on but it just sits there and eventually the CPU details are shown and everything boots at normal speed. Warm reboots are not a problem.

Specs are
i5 760
2x2gb Corsair 1600 mhz
Gigabyte p55 ud3a
GTX 470

It's been doing this for years and I've never been able to sort it. I have never been able to test things properly with other gear.

Once up and running the pc runs fine.

Things I've tried

CMOS reset and optimised defaults
Quick boot on and off
Memtest (both RAM modules are fine)
Each RAM module individually in different slots

I could try another graphics card and psu if they're possible causes but if not, could the CPU somehow be faulty?

Thanks a lot.
 
Sounds like it might be stuck on something.

im a stoner, but i would try things like different ram altogether and try putting the hd's in different sata ports etc
 
I would first of all try stripping the machine back to the bare minimum (CPU, 1 RAM stick, no HDDs, no overclocks) and see how it POSTs. Assuming it POSTs quickly, start adding things back one at a time until you find the one that affects the POST time - I remember having to do this with an old (Q6600) build and it turned out my culprit was the wired Xbox 360 controller causing it to delay. Moved to a different USB controller USB port and it was fine and dandy until the day the board went to a friend.
 
Confused Stu said:
I would first of all try stripping the machine back to the bare minimum (CPU, 1 RAM stick, no HDDs, no overclocks) and see how it POSTs. Assuming it POSTs quickly, start adding things back one at a time until you find the one that affects the POST time - I remember having to do this with an old (Q6600) build and it turned out my culprit was the wired Xbox 360 controller causing it to delay. Moved to a different USB controller USB port and it was fine and dandy until the day the board went to a friend.
Click to expand...

Thanks but I should have said I've already done this.

Whatever happens at cold boot that doesn't happen on a warm one is causing the problem.
 
Have you tried disabling all the USB ports in the bios then performing a cold boot?

My guess would have been HDD, but you say you've tried. Something is certainly amiss. Sometimes giving certain parts of the mobo a good blow or dust off does the trick, there may be some bit of crud shorting something somewhere.
 
Having external hard drivers connected for example can cause slow boot times but 3 minutes would be way too long for that anyway.

As someone else suggested try updating the BIOS if not already done. Also if you have spare parts lying around swap a few parts out at a time and see if anything makes any difference, check for loose wires too.
 
its usually memory or not enough qpi/vtt voltage for cold boots

how much qpi/vtt you using? try with 1.25v and see if that helps on a cold bootup
 
wazza300 said:
its usually memory or not enough qpi/vtt voltage for cold boots

how much qpi/vtt you using? try with 1.25v and see if that helps on a cold bootup
Click to expand...

It does it at stock but the delay is longest when overclocked.

Currently using 1.35 qpi for 4ghz. Anything less is unstable.
 
tested with between 1.35-1.38v qpi?

also disable floppy drive in bios,even if you don't have one connected
 
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