Choosing between two video cards: nVidia GTS240/250 vs. ATI HD4870

"This article treats how the GTS 250 stacks against the Radeon HD 4870 (and others).
It contains this comparison chart that tells you everything technical that you ever wanted to know and were afraid to ask about.

More importantly, it contains detailed performance analysis for different screen resolutions in the section First-Person 3D Shooters. My personal conclusion is that performance-wise there are only slight differences between the models. Which probably means that the lower model of GTS 240 is inferior to the Radeon."

"It depends which NVIDIA card. NVIDIA does not make their own chipsets, but license them to third parties to manufacture. ATI does the same, but they also make their own.

Regardless, I'm an NVIDIA fanboy and would say to go with at least the GTS 240... Although there are a lot of video cards which give much better performance and are very reasonable in price (*cough* the GTS 250, which is based off of the N92 chipset - ever hear of an 8800GT/9800GT? *cough*)."