Since I use this forum to find so many solutions, I thought I'd add some stuff after going crazy.
Mountain Lion 10.8.1 on:
32 GB 1600 ram
startech FW 400/800
System has been running great. then... not. Waking from sleep caused a frozen screen with message about an unplugged drive. this has been driving me crazy and I have blamed various things, reinstalled -- the usual.
I found the solution was to lower my (overclocked at stock voltage) cpu back to the stock speed. I had it running at various speeds up to 4.2 (on a stock cooler, which is why I didn't go higher) But right now, I can't get it to budge beyond 3.5 without causing a sleep problem.
Why??? I haven't figured out and I don't really like, considering it's a "k" chip.
I just wanted to put this out here...
Solution and a problem.
** In order to get this board to overclock and also wake from sleep with USB working... The PLL voltage control has to be disabled in the bios. That seemed to do it. I'm currently at 4.5 GHZ on a 3770k (with a NH-D14 Cooler) at stock voltages and everything has been running fine. (fingers crossed)
And your Graphic Card is now working well? Slleep/Wake, No freeze etc.. ?