The 4870 isn't really a high end card to compete against this beast from Nvidia, but let's compare them anyway, just for fun.
|GeForce GTX 280 | ATI Radeon HD 4870
Process: | 65nm | 55nm
Core Clock: | 602MHz | 750MHz
Shader Clock: | 1296MHz | 1050MHz
Memory Clock: | 1107MHz | 1800MHz
Memory...