This may be a late reply, but, have you tried to hit the MemOK Button? Made sure the Core Activation switch was turned OFF? Also, I found that if the 4-Pin CPU Fan is not plugged in, mine will not post beep at all, (knocked my plug loose rerouting wires last time I was in it). Check to make sure you have the RAM in the proper slots. Last but not least, this motherboard is very picky about the RAM it will take, did you check with Crucial's Website to make sure those 8GB RAM cards would be compatible? When I bout mine I didn't see any 8GB Cards on the list, but a 2x4GB. Also, Sugestion, buy 1333 Ram as that is the fastest it will run w/o O.C. Installing PC3-1600 you will have to manually set EVERY aspect of the System: CPU speed, Multiplier, CPU/NB Speed &Voltage, RAM Speed&Voltage, and more, but it will run on Auto, at partial speeds.