I have a Fry's/GQ5140 pc. Now I am having issues will my memory upgrade. I am trying to install Corsair Model# TWIN2X4096-6400C4DHX, which is a 2 x 1 GB DDR2 800. My computer powers up, but does not boot. I ensured the sticks are seated properly. Any ideas? Both corsair and ECS claim to support the memory.