GTX260 is in reference to the Nvidia Video Card.

http://www.nvidia.com/object/geforce_gtx_260.html

Some of the top of the line GPU's right now. A bit expensive but great video card. Goes for about $300 dollars.

I run 4 on a slower PC but I do get lag from time to time, but I do not have then running Symlink or anything kind of lazy and running from same folder as well only 4g of RAM, but a quad core AMD, XP Prof.