Ooh! How is the difference? I have an Athlon 64, but decided not to upgrade to win 64 because I've heard it's not as compatible with stuff. I'm just going to wait till vista comes out and use the 64 bit version of that. Anyway, for those of you who don't know goldeneye source released the first version of their mod today. I haven't tried it yet, but I will very soon.Whon said:I'm happy Steam updated to 64-bit HL2 now everyone like myself with windows xp 64 can benifit the ability of 64bit rather then 32 yeah, faster is better