I want to replace the video card in this computer, but have a few questions. The power supply is only 300 watt unit. Most cards I look at say they need a minimum of 300 watts. My question is will these cards work without slowing my computer down or will I need to replace the PSU? I'm looking at either PNY GeForce 6600 or PNY GeForce 7300 GS. Will either one work ok? My computer specs are PentiumD 920 2.8, Motherboard Asus P5LP-LE, 2 GB DDR2 SDRAM, current video card is GeForce 6200SE with 64 MB DDR memory. This computer is only 1 month old but the monitor is a Samsung 930B with DVI interface. That's why I want to change card so I can use the DVI option. Thanks for your replies. Any other suggestions will be appreciated also. Thanks again