Guys,
I might have the answer to your problems. This might fix your sleep/suspend problems and your random freezing problems. Bottom line is that the default and "auto" values in Win 7 and your BIOS might not produce a stable computer...even with a virgin install.
RANDOM FREEZES FIX:
My computer used to freeze randomly until I fixed the memory timings. I suspected bad memory early on and tested it with MEMTEST, but it passed with flying colors. I even tried swaping memory out, trying to eliminate bad memory and/or slots. It turned out that it was a memory frequency/timings/voltage issue. No more freezes! If you have a similar setup, this will most likely fix it. If not, then check your memory and/or power supply.
The "AUTO" settings in BIOS *may not* produce a stable setting. You have to goto the ASUS support website and download the latest memory QVL and lookup the memory settings for your particular brand there. For my memory (OCZX1333LV6GK(XMP)) I had to make the following adjustments in the BIOS:
DRAM Freq:1066 (even though my memory is rated at 1333 frequency, the QVL guide recommended a lower freq!)
7-7-7-16 for the rest of the timings. The other settings I was able to leave in "AUTO"
DRAM BUS Voltage: 1.6
*warning: be sure to consult your memory/motherboard documentation...the wrong value could damage your components!
SUSPEND/SLEEP FIX:
My computer used to hang when coming out of sleep or wouldn't completely goto sleep. This solution may be partially dependent on you fixing a random freezing issue if you have one.
In your "advanced" power settings, disable "Hybrid Sleep". That's it! My motherboard doesn't like hybrid sleep.
*If you have a desktop with a UPS, Win 7 will treat it like a laptop and apply the battery settings....sooo make sure you adjust the "on battery" settings!
My setup:
Processor:Intel core i7 920
Motherboard:Asus P6T
Memory: OCZX1333LV6GK(XMP) (ie. 6GB in 3 sticks)
Harddrive: 3 x WD Caviar Black drives in RAID 5
PSU: X3 1000W
Video card: 2 x NVIDIA 9800 GTX+ SLI
*I have all of the ASUS overclocking/energy savings programs uninstalled
*I have the latest BIOS 0801 and all the latest drivers installed
Nick