Hate to spoil the party on that one guys, but the wrong RAM can screw things up!!!
OK, it's a rare and perplexing occurance, but when I was using an ELITE Mainboard with support for a maximum PC2100 RAM, I made a mistake buying it, and instead installed PC2700, running a 1.3 Duron.
When I rebooted, All my bios settings disappeared. I set it all up again, pressed F10 and exited, and when it rebooted, there was no graphics, no post, nothing but a flashing cursor in the top left of the screen. I took my tower to a shop to have it all checked out. Turns out the mainboard blew. I hadn't touched the mainboard itself other than the DIMMs. I was touching the computer cae all the while, and the power lead was unplugged from the back. Go figure!?!?!?!? I've never seen anything more odd than that, but it goes to show, it can happen.