GA-P55-UD3L Wake from sleep

[jpe30]

So it seems that I solved my problem, although I'm not sure which update caused the problem to disappear.

The first thing I did was update to the new F7 BIOS, loaded optimized defaults, then set all the wake-on-LAN settings off.  I also downloaded the built-in motherboard LAN drivers directly from Realtek's site.  I noticed the drivers from gigabyte were dated in Device Manager as over a year old.  After installing the new drivers from Realtek, I set all the wake-on-LAN settings to disabled in the driver.  Both the BIOS and driver settings were the same as before, so clearly an update did the trick.

Looks like everything is working well.  I had the PC in sleep mode for over 2 hours yesterday, which I was not able to do before.

[jpe30]

Ok, I take it back.  Left the computer asleep for about 5 hours.  When I got back it was on.  Looks like I'm back to square 1.

I should add, I left the PC asleep with no ethernet cord attached once.  When it woke on its own, it restarted and didn't wake properly.  I don't have any extra PCI or PCIE devices installed except for a video card.  I'm officially stumped!

[Dark Mantis]

I  know it is a bit far fetched but is there anything nearby which could cause your computer to vibrate/move even slightly? I am thinking trains or the like, son's bedroom( believe me i know).

[jpe30]

Nope, nothing that would consistently wake up the PC every time I put it to sleep.

[Dark Mantis]

There's only one other thing that would fit the circumstances and theat is a dodgy PSU. Can you arrange to borrow one for a day or two? Make sure that it is good quality though.