How to find compatible Video Card?

Okay. You have a Gateway mini tower with a Pentium 4 processor and a PCI Express x16 slot available.

You can put in any PCI Express card that:

1) Fits your case

2) Your power supply can handle

3) You can afford

It would help to know what you wish to do with that new video card. Watch movies (low end) or game (high end). Knowing what your power supply specs are - such as how many Amps are on the 12v bus - would also be a big help. (these have to be read from a sticker on the side of the power supply)

Without upgrading the power supply, you have few options.

1) ATI Radeon HD 5450 is very low power and will work in almost any PC

2) ATI Radeon HD 5570 is semi low power, and will likely work

3) Low end nVidia cards would also work, such as the GeForce 310 or GT 220.

None of the above cards are considered hardcore gaming cards. With a P4 processor, I can't advise getting a higher cost video card and power supply upgrade because your processor will become the limiting factor.

You should definately get EVGA nVidia GeForce 210 512 MB PCI-Express Video Card

*PCI Express 2.0

*589MHz core clock and 1402MHz shader clock

*512 MB of DDR2 memory

*800 MHz memory clock with 2.0 ns memory speed

*Windows XP, Windows Vista and Open GL 3.1 Support

http://www.amazon.com/EVGA-nVidia-GeForce-PCI-Expr...

Also check out at Ebay

http://rover.ebay.com/rover/1/711-53200-19255-0/1?...