My fx5200 pci, w/ 760 mb o' ram, and a celeron 2.6 ghz, ran the new DOOM III demo pretty well. I put the res and quality all the way down, but enabled all of the Advanced options like specular, bump mapping, shadows, and advanced effects. My ques to you is....is HL2 gonna be more or less of a resource hog than doom, bc i heard hl2 is gonna be flexible, and i also heard doom 3 is a beast and it eats your comp for breakfast. If its even the slightest bit more flexible than doom than ill be in heaven...