Re: Tested Intel® Core™2 Duo with 480GTX for CPU bottleneck
So how did you determine there was no bottleneck? Turn your graphics down to minimum with a low resolution and run your tests again. If the FPS is about the same, then you definitely have a bottleneck with your CPU.
The term "bottleneck" is misleading, because it needs to be with respect to the other components. A bottleneck implies that there is a rate-limiting step, which is typically either the CPU or GPU. My E8400 at 3.6GHz bottlenecks in BC2. I can play at 1920x1200 with 4xAA 4xAF or at 1680x1050 with no AA/AF and I get the same framerates in the mid 50's. Meanwhile, people with i7's typically get over 100 FPS in BC2.
EDIT: Did you compare them to a similar review with an i7?