Windows 7: What kind of graphic card be upgraded on this computer?

Newegg.com - Refurbished: HP Pavilion P6623W (BT428AAR#ABA) Desktop PC Athlon II X2 240(2.8GHz) 5GB DDR3 640GB HDD Capacity ATI Radeon HD 4200 Windows 7 Home Premium 64-Bit

It could run any graphic card, since you have 1 x PCI-E (x16) slot, but you might want to upgrade the PSU to work with the card. But since the CPU is AMD i would recommend an ATI card.

ok thanks

No problem!

Also, you might want to do some research on the card before buying, because some cards require a better PCI-E slot.

Okay i will do that.

My take:

The motherboard:

Motherboard Specifications, N-Alvorix-RS880-uATX (Alvorix) HP Pavilion p6623w Desktop PC - HP Customer Care (United States - English)

is spec'd as having a PCI-E X16 graphics slot, "Gen 2 speed". That should be compatible with any PCI-E X16 graphics cards, including the new PCI-E 3 cards.

The PC is listed as having a 250W power supply, so that'd need an upgrade for anything but very low-end graphics cards.

I disagree about getting an ATI/AMD card to match the AMD CPU. Get the make that you'd like. As far as I know, there are no compatibility issues. Some of the newest AMD motherboards have been licensed by nVidia to support SLI.

Can eva geforce or sapphire radeon work on it? Well i dont have the computer planning on to buy it and graphic card along with it.

Yes, but most upgraded graphics cards would need a larger power supply.

eVGA (www.evga.com) and Sapphire (www.sapphiretech.com) list system requirements for their cards.

Nothing wrong with using nvidia cards along side an AMD cpu. Main advantage for ATi cards is they are generally cheaper.

For high end gaming nvidia handles FXAA and shadows a lot better.