elvenchrist :
thanks for your help. One other question if I may. I don't no anything about computer hardware. What is the difference between agp cards and pci-e cards?
AGP is an older standard. Already very obsolete, since many years.
PCI-Express is used today, and in the foreseable future.
You cannot connect a PCI-E on an AGP slot, and you cannot buy anymore any good high performance AGP card. Also for an AGP card you pay a high premium price wich does not give you good hardware.
for 120 u$s you can buy a motherboard with a nvidia 6100 integrated video, an Athlon X2 processor, and 4 Gb of DDR2 800.
That is really scraping the barrel, but:
-If you don't need to play games, it will be far better than you system with any AGP card.
-If you want to play games, then you can add a Geforce 8800 GT, or ATI 4850, and play Crysis at 1024x768, mid settings, with 2x AA. (that is a fact, I did it with such a system, 2Gb of RAM, an Atlon X2 3600+, and GF 8800GT, it played Far Cry 2 even better)