Performance in Semi-Synthetic Benchmarks
3DMark06 produces interesting results. The new inexpensive card from ATI performs like in the real-life games in the SM2.0 tests, i.e. outperforms the Radeon HD 4830 and is somewhat slower than the Radeon HD 4850. In the SM3.0/HDR tests it is only as good as the former, though. Its performance must be limited by the memory subsystem then: the Radeon HD 4700 has a lower memory bandwidth than the Radeon HD 4830.
Futuremark 3DMark Vantage
We minimize the CPU’s influence 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 new card is more predictable in 3DMark Vantage: like in most of the gaming tests, it is comparable to the GeForce GTS 250 512MB at the default frequencies and to the Radeon HD 4850 at the overclocked frequencies.
The first test shows that the Radeon HD 4770 is somewhat superior to the Radeon HD 4850 at 1280x1024 and 1680x1050 but the latter is ahead at 1920x1200. That’s reasonable, considering that this test mostly loads the GPU’s computing resources – the Radeon HD 4770 has a higher core frequency than the Radeon HD 4850, let alone Radeon HD 4830.
The new card is somewhat slower than the RV770-based solution in the second test, though. On the other hand, it is far ahead of the Radeon HD 4830 and GeForce 9800 GT and is competitive to the GeForce GTS 250 512MB at resolutions above 1280x1024.