I hope someone can help me with this puzzeling "simple" upgrade. I originally had 1 gig of ram in my new computer (Corsair DDR2-5400 2x512). I went to the same place and got the exact same brand and model of ram (2x512 again) and installed it. Everything booted fine, and it was slightly faster. Ran a couple of programs and the loading times were noticeably faster. However, when I tried to access the internet, it did not work. I ran ipconfig, released, renewed, and it would pull the IP adress from cox cable. I would try to ping certain sites, and it would not work. I fideled around with the modem... powering off and powering on, readjusted the network cable, etc. This seemed to work. I played some battlefield 2, then turned my computer off. I turned it back on and I had the same problem. I tried the same steps as above, but this time with no luck. What I don't get, is that it pulls an IP adress. I have a 2nd computer connected through the router, and I tried the internet at the same time the one I'm having problems with didnt work, and the 2nd computer worked fine. I tried switching cables, switching port's in the router, etc. Finally I removed the new ram, rebooted, tried to get on the internet, and it once again did not work. So I reset the cable modem, tried again and all was back to normal. Could the NIC on the motherboard be going out? Should I try a fresh install of Windows XP? Any suggestions or anyone else heard about these problems? Thank's for you responses.