Frustrating RAM issues I recently undertook an upgrade of my system as my graphics card, an Nvidia 7600, had crapped out. ASUS M2N-E AMD X2 3600 2GB Kingston DD2 667Mhz 240pin DIMMs Nvidia 7600 GT etc.... I purchased a new Nvidia GeForce 260 and a couple more 1 gig RAM chips, Kingston DDR2 KVR667D2N5/1G The RAM is identical in make and specification to the RAM which was already in my system (although their appearance isn't identical). At the time I didn't realize that my Windows XP system wouldn't be able to handle the extra RAM, but that's besides the point now. I had to upgrade my power supply from 450w to 550w, for the graphics card. I finally got it all working, but when I checked my system specs, in both BIOS and in Control Panel it said I only had 1 gig of RAM installed, even though it should have read 4gigs (my 2 old chips, plus the 2 new ones). Realizing that I'd taken a step back, I pulled the new RAM chips out and restarted my computer. Now my system won't boot. I get 1 long and 2 short beep warnings which tells me there's either a graphic or a RAM problem. I've tried all possible configurations with the RAM chips, but to no avail. I've also tried installing two Crucial 1GB DDR2-800 pin PC2-6400, 240pin DIMMs, but I get the same fault. I've checked the plugs on the graphics card thinking that maybe it was actually a graphics issue, but all plugs seem fine. Please help, I'm getting very anxious as I need my computer to study.