I am still having annoying issues with sleep/resume and my Asus P8P67 Pro system.
While digging through the BIOS settings to underclock my RAM speed (as suggested as one possible resolution) I cam across an ‘EPU Power Management’ option (beneath the RAM settings- of all places)- and disabled it.
I will not know until morning if this fixes my standby issues- but I will try to update my findings over the weekend.
Update: The EPU power setting had no effect; it may actually be having more issues than before.
On a hunch, I decided to look at the memory to see if it may be the problem. I was running 2x4GB and 2x2GB sticks for 12GB of RAM; I pulled the 4GB modules and replaced them with some older 2GB modules (so now at 4x2GB = 8GB). I reset the BIOS to ‘optimal’ settings and my PC appears to have stayed online for the night; I will need a few more days to confirm, but initially this looks promising; 9+ hours and no sleep issues!
Update #2: It looks like my RAM was the culprit!
I replaced the 4GB modules with 2GB modules and I have been almost a week without a sleep/shutdown issue. (I did have one lockup, but that was probably a normal Windows issue). I am nit sure if it is the 4GB module size or the RAM is defective, but I am currently running:
4x Corsair XMS3 2GB PC3-10600 1333MHz 9-9-9-24 (Kit of CMX8GX3M4A1333C9)
2x Corsair XMS3 4GB PC3-10600 1333MHz 9-9-9-24 (Kit of CMX8GX3M2A1333C9)
I believe my memory was banked correctly; 4GB modules in slots 1 & 3 and 2GB modules in slots 2 & 4.
I am not sure if I want to try just the 4GB modules to see if the issue returns or if I should just be happy with it running as is. I was hoping to eventually go to 16GB and onto 32GB (when they get around to making non-registered 8GB DDR3 DIMMs)- so I am kind of at a loss for what I want to do…