I bought 2 1GB RAM chips from macsales.com to replace my factory chips. When I took the original ones out, they were in very tight (as it seems they should be) When I put the new ones in, they were very loose, and there was a bulge in the casing that holds them in. Now that I boot my computer, it only recognizes one of the RAM chips. I have tried numerous configurations, and it seems the right side slot is not working. I even tried putting the factory chips back in. Sometimes it won't boot at all. Right now, both 1GB chips are in, but only one of them is recognized. I'm afraid to try again as it may not reboot, and I've heard of others who've had this same problem.What should I do? Has anyone else had this same problem? (Specifically with the RAM chips not fitting very tightly and with the bulge) Thanks for your help.