Hi all. I am in the process of upgrading my pavilion. The first thing I did was replace the skimpy 300W Bestech power supply with a Roswell RD600N 600W power supply. The leads are long and bulky but with a little creative tucking and routing of spare leads I was able to install the PS. I lit off my machine and gave it the smoke test and encountered no problem. I only wanted a 500W PS but this unit was on sale and it had 2 fans. I also want to replace the NVIDIA GeForce 7300 LE display adaptor with a evga NVIDIA GeForce 8400 GS card. I am not into gaming or anything like that. I put in my card last night but was only able to get 800XX600 pixels with a Lo 4 bit quality. I could not change my display settings and my monitor looked terrible. My monitor is a Samsung SyncMaster 226BW and there is no problem wihen using the 7300 LE card. Any help? Am I doing something wrong?. I installed the drivers and card according to the instructions but am still having problems. Thanks in advance for any help.