You're almost always going to be GPU limited at high settings, so I don't see much point in upgrading to it if you already have an Athlon 64. Those with Pentium 4's would definitely benifit though. Personally, I don't see the point of buying a dual core cpu until games are written to take advantage of them.

1. Street Fighter II Special Championship Edition (GEN) 2. Duke Nukem Forever (PC) 3. Thrill Kill (PS1) 4. Shenmue (DC) 5. Rez (DC)