- last post: 01.01.0001 12:00 AM PDT
Upgrade the processor to the Intel Core 2 Duo 1.7 GHz (Each, it will show up as eather 1.7 GHz, or 3.4 (ish) GHz in a store. Then upgrade to the X2900, that should fix the bottleneck problem.
Or you could just screw ATI, and go for the nVidia 8600 GT. Works fine for Halo 2 on medium - high specs.
[Edited on 10.08.2008 12:14 AM PDT]