Ok I got 2 new 512 ddr2 400 pc3200, when I put them in and start up it just keeps rebooting itself over and over again. Is there any way to stop it from doing that? When I turned it off, and turned it back on i pressed F1 and it says it's installed, It goes like this: Bank1 256 ddr2 400 pc3200 (old) Bank2 512 ddr2 400 pc3200 (new) Bank3 256 ddr2 400 pc3200 (old) Bank4 512 ddr2 400 pc3200 (new) I previously had 2 256 ddr2 400 pc3200 in, I have 4 slots to put them in, do I need to take the old ones out and keep them out or can they stay in. Right now I have them out with the old ones still in, awaiting an answer, can someone please help thanks.