In terms of performance the Inno3D GeForce GTX 580 OC was on average, in the 13 games that we tested, 5% faster than the Radeon HD 5970, 31% faster than the GeForce GTX 480 and 53% faster than the Radeon HD 5870. Out of interest if you ignore the results from Metro 2033 and particularly S.T.A.L.K.E.R.: Call of Pripyat, the Inno3D GeForce GTX 580 OC was on average 3% slower than the Radeon HD 5970 and just 39% faster than the Radeon HD 5870.



Link: Legion Hardware