External initial release

Hi, I need help. We just bought an older dell for my husband to use. Year 2004. Runs great but hes a gamer and the graphic card wont support his games. So we want to upgrade it but I cant even figure out how to figure out what the current graphic card is on this.

I want to share with you this information. I found why the hard drive led (green cylinder) was on 99% of the time. It will be on during the first 4 and more hour of operation. The raid array is in background initialisation. So it's normal.