I just finished upgrading my system from XP to Win7 64, mainly to get the benefit of the extra memory available to the system. My mobo holds a max of 16GB. I originally had 4GB of 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Dual Channel Memory (9-9-9-24)(CL 9)(1.5V).

I ordered a 4-pack of 4GB sticks DDR3 1600, CL 8, 8-8-8-24, 1.5V that were selected and supposedly compatible for my mobo. I remover the 2-2GB sticks and installer the four new sticks. Turned the system on and no beep, no nothing. The system would not recognize the memory.

I removed all the new sticks and reinstalled the original two sticks and it started right up. I removed the two sticks and installed a single stick and tried to start the system. Nothing. I tried each stick individually and nothing. I tried two sticks and nothing. I requested an RMA from the seller, but was wondering if there is something that I have not tried to get the system to recognize the memory?