Okay, so I do possess knowledge in computers, but in hardware stuff I am really bad. I would like to upgrade my NVIDIA Gefore FX 5200 video card (it was included with my computer when I bought it a few years ago ) to a better one. I do not necessarily want the latest uber 500$ technology piece of hardware, I'd only like to get smoother FPS on my games. For example, I currently run World of Warcraft at around 25 FPS outdoor, and I am sure it could be further increased.
Any advice would be helpful, such as what brand, or help about compatibility issues (how can I be sure a card will fit in my computer?).