Originally Posted by Puckman1
I recently built myself a system with this board, but have noticed it refuses to wake up from sleep.
I have to turn the power off completely and reboot the system for it to wake up after entering Sleep.
Has anyone else noticed such issues with theirs?
A google search yielded some other people complaining about various similar issues, but I was never able to clearly establish the cause (a lot of what's on line and in other forums appears to vary widely in description and resolution method).
I've recently posted threads about this very same issue. It was probably the reason I deferred sleeping our computers for several years.
First, I can only talk to Sandy Bridge implementations, but it was known early in the release of the Z68 boards that OC'ing beyond 4.5 Ghz with PLL Overvoltage enabled would cause the system to fail emerging from sleep. Supposedly, with the one computer I DON'T put to sleep (my Z68 Sandy), this was fixed in a newer BIOS version following the one I currently use, and I haven't yet bothered to flash in the newer version, test and tweak.
Second, for any other system which has this problem -- and the reason for the threads I mentioned -- consider that we're all trying to recycle parts which we think are "still good." In my case, I had 5-year-old mobo and CPU that had been used less than three months tops. I also had a 5-year-old Antec NeoPower 500 which HAD been used -- not 24/7 -- but consistently over 5 years.
One of the first things to check, apparently, when you can't wake a machine from S3 or hybrid sleep, is the PSU. The PSU must trickle a small amount of power to the motherboard through a +5VSB lead to refresh CPU and RAM and maintain the sleep state. If it doesn't, you will see all the fans and lights go on by trying to wake the system, but no system post. [Which requires you then to shut down abnormally through the power-switch and reboot.]
I have as yet one computer with an mATX motherboard which only seems to work in S1 sleep-state, powered by a seven-year-old PSU which was top-end in its day to supply much more power than the machine needs. But it's old, the mATX board and chipset offer more than S1 in sleep-state options, and I'd bet some money that a PSU replacement will resolve the problem.