Sony Buyer

I want a graphic card in order to play those high quality games like assassin creed and bioshock. But I want to which graphic card is right and compatible for sony vaio desktop 2006 models.

you're gonna have to open up your computer to figure it out. first you need to find out what ports you have available. If you have an AGP or a PCI-Express x16 slot on your motherboard then you will be able to put a card in there. If all you have is PCI left on your motherboard then you will not be able to upgrade. there are PCI cards available but unfortunately they won't be able to increase your performance in gaming.

http://en.wikipedia.org/wiki/PCI_E

http://en.wikipedia.org/wiki/Agp

http://en.wikipedia.org/wiki/PCI_Local_Bus

after that, check out your Power Supply Unit and find what type of Wattage it has, if it is below 350 watts then you will have to upgrade to a higher capacity, usually around 500 watts. then finally see what kind of connectors are on your PSU, each card is different but usually need 4 or 6 pin connectors in order for them to function.

http://en.wikipedia.org/wiki/Computer_psu