Which would be faster for 3d games, this chipset/video, an Nvidia 9500gt, or an Ati hd 5570?

Would I have any problems setting up a dedicated gfx card with this NVIDIAŽ GeForce 7025/nForce 630a chipset in Linux?

http://www.gigabyte.us/Products/Moth...ame=GA-M68M-S2