Performance in Semi-Synthetic Benchmarks
3DMark06 suggests that there is not much point in assembling a Radeon HD 4870 3-way CrossFireX subsystem because its overall score is only 1156 points higher than that of the Radeon HD 4890 CrossFireX but the latter consumes far less power and is quieter. Well, we don’t think that a hypothetical Radeon HD 4890 3-way CrossFireX would be much better in this old version of 3DMark that defaults to 1280x1024.
Otherwise ATI’s solutions – both single- and multi-GPU ones – are quite fast.
The individual groups of tests provide far more interesting results: the Radeon HD 4890 CrossFireX tandem is even ahead of the Radeon HD 4870 3-way CrossFireX in the SM2.0 tests whereas the latter is ahead in the SM3.0/HDR tests, scoring over 11,000 points. The other multi-GPU solutions can only score about 9500 points.
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.
This test supports hardware PhysX acceleration on Nvidia’s GPUs, so the SLI systems, from the GeForce GTX 295 to the GeForce GTX 285 pair, take top places. The Radeon HD 4890 CrossFireX cannot score even 9000 points while its opponents easily overtake that barrier. The Radeon HD 4870 3-way CrossFireX is competitive, yet cannot beat the GeForce GTX 285 SLI.
The GeForce GTX 285 SLI tandem is ahead in the first three resolutions of the first test, but the Radeon HD 4870 3-way CrossFireX wins at 2560x1600. The Radeon HD 4890 CrossFireX is always slower than the GeForce GTX 295 but the gap shrinks to naught at 2560x1600.
Nvidia is not so victorious in the second test: the GeForce GTX 285 SLI wins at the first two resolutions only and loses to ATI’s triple-GPU platform. The Radeon HD 4890 CrossFireX is ahead of the GeForce GTX 295 at high resolutions, starting from 1920x1200.