Legit Reviews posted a comparison review between GeForce GTX 275 and Radeon HD 4890
A quote from the article:
>> GeForce GTX 275 Versus Radeon HD 4890 Video Card Battle Review
What happens when you take the NVIDIA GeForce GTX 275 with Forceware 190.38 drivers and the ATI Radeon HD 4890 with CATALYST 9.7 drivers and see how they do on odd ball game titles like Velvet Assassin and Wall-E? That is what we tackle this time around between these two popular gaming graphics cards.
>> GeForce GTX 275 Versus Radeon HD 4890 Video Card Battle Review