Performance in Semi-Synthetic Benchmarks

Futuremark 3DMark06

The parity between Radeon HD 4770 CrossFireX with a $200 price tag and Radeon HD 4850 X2 looks really impressive especially since the difference of 100 points is pretty negligible in this case. Moreover, RV740 tandem runs even faster in SM2.0 tests due to higher clock frequency. However, the defeat in SM3.0/HDR tests caused by lower computational power eats up the advantage resulting into even total score.

Futuremark 3DMark Vantage

We minimize the CPU’s influence in 3DMark Vantage by using the Extreme profile (1920x1200, 4x FSAA and anisotropic filtering). We also publish the results of the individual tests across all display resolutions to provide a full picture.

The performance in 3DMark Vantage is not so impressive because PhysX acceleration is not supported. However, Radeon HD 4770 CrossFireX managed to get considerably far ahead of the single Radeon HD 4890 and fell just a little behind GeForce GTX 275.

The results of individual benchmarks prove everything we have just seen: Radeon HD 4770 CrossFireX barely yields to Radeon HD 4850 X2 but is convincingly ahead of Radeon HD 4890. It is also evident that our hero feels best in lower resolutions, where memory subsystem and RBE performance have minimal effect on the final speed. However, it manages to outpace GeForce GTX 275 in the second test, even in 1920x1200, due to higher computational capacity.