Hello there, I recently got an 20' 2.4 GHz Intel Core 2 Duo iMac. It came with 1 gig of Ram. I purchased 2 2Gig SODIMM chips from New Egg. The ram specs matches what the little manual says. ddr2, pc2-5300 667MHz. When I install the new chips, the mac won't start. Period. No beeps, no nothing. I can sort of hear it try to start, then quits. When I put back the original ram chip. Works again. When I have the original ram chip AND 1 of the new chips (for a total of 3 gigs of RAM) it works. Swapped one new chip with the other (as long as the original is in) Works. Original Chip is on the right side, New is on the left. Swapped places. Works. The mac will start ONLY if the original is in place. I should be able to start it with the nes ones in but it won't. I know both works because I swapped them. Anybody have any ideas on what's going on? Is there a setting somewhere I need to change or something? Thanks!