I am running a custom-build system with an ASA P5k Deluxe motherboard and Q6600 processor.  I'm not sure if this is a software or hardware problem, but I'm having trouble with sleep in Vista.  If I set my BIOS power setting to Auto or S3, my machine will not resume from sleep properly.  I can work if set to S1.
 
This is a custom-build with all new components, so I'm scratching my head over waht device might be having trouble with S3, or is the mobo?
 
I looked in the Vista logs and cant seem to find anything that it flags as a problem.
 
Any advice?