The Tech Report posted a comparison review between Radeon HD 7950 and GeForce GTX 660 Ti

Ah, it's the eternal battle, the unending duopoly duel: GeForce versus Radeon, Radeon versus GeForce. The skirmishes are ongoing, but the victor is never decided for long. Today, another chapter in the story unfolds.

Doesn't seem that long ago, back in August, when the GeForce GTX 660 Ti first hit the scene and squared off against the Radeon HD 7950. That match-up ushered in a new generation of competition among ridiculously powerful video cards at around 300 bucks. Nvidia had the advantage going in, since it was facing off against an already established competitor; it knew what the GTX 660 Ti had to do in order to win. AMD, however, has been unusually feisty lately, and it had other ideas. At the last minute, the Radeon team rolled out a new BIOS that added dynamic clock speeds to the 7950. The result was an incredibly slight win for the GTX 660 Ti on points, but in the end, we threw our hands up and said the differences mattered little.

We're vaguely astonished by how much things have changed since then.

  Radeon HD 7950 vs. GeForce GTX 660 Ti revisited