Performance in Semi-Synthetic Benchmarks
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 GeForce GTX 295 supports PhysX, so AMD’s solutions are handicapped in this test. Still, we can note that the Radeon HD 5700 CrossFireX platforms are not fast even in comparison with the Radeon HD 5870. The Radeon HD 5770 tandem barely touches the 8,000-point mark while the single-chip Radeon HD 5870 takes the barrier easily.
The individual tests confirm our point. The Radeon HD 5770 duo can compete with the single Radeon HD 5870 in the second test only. The cheaper CrossFireX configuration with a Radeon HD 5770 and a Radeon HD 5750 is only competitive at 1280x1024.
SiSoftware Sandra 2010 Engineer
This test serves to estimate the computing capabilities of GPUs that can be used for GPGPU applications. We select OpenCL mode which is common for AMD and Nvidia solutions.
At single-precision computations the junior Radeon HD 5700 CrossFireX tandem is almost as fast as the GeForce GTX 295 that has much fewer ALUs whereas the senior CrossFireX configuration is close to the Radeon HD 5870. However, the RV830-based products are hopeless in double-precision mode which is used for serious scientific and engineering computations. They do not have native FP64 support and emulate such computations in a very slow way whereas the RV870 Cypress supports FP64 natively and delivers a highly impressive result. The failure of the GeForce GTX 295 is due to an extremely inefficient implementation of FP64 support in the G200 chip: there is only one FP64 unit per each 30 shader processors.
FP32 mode is quite enough for home use, though. Besides, currently available GPGPU applications are mostly based on Nvidia’s CUDA technology rather than on OpenCL or DirectCompute. The GPGPU concept has not yet fully taken off.