I have a ~7 year old pc its installed with windows xp and the original geforce 4 mx440 its got and AMD cpu running at ~2.1ghz. I bought a HIS radeon 2600xt a couple weeks ago and i had to buy a new 450 watt or better psu. I have a micro atx case and the psu i got was from hercules, supposedly it ran at maximum 450. The side panel to my case is taken off for better cooling. When I put the 2600xt in the computer after uninstalling the the old drivers and connected it to the power supply's molex/peripheral connector and booted the computer, the display works for about thirty seconds I dont even have the time to install the new drivers for the card, i looked at the peripheral connecting my video card and there was a red light flashing im not sure what this means either, the peripheral cord also get REALLY hot as well as the card itself. Do I need a new cooling system or power supply? What would you reccomend?