Perfomrance comparison of GPU boards from AMD as of Oct 2009

We have tested GPU borads from AMD with our test program implementing a simple N² force evaluation algorithm. A nominal performacne of each board is shown in the following table.

board	arch	clock	memory	No.SC	SPmul-add	DPadd	DPmul	BW
HD4850	RV770	625 MHz	DDR3 662 MHz 256bit	800	1040 GFLOPS	208 GFLOPS	104 GFLOPS	63.6 GB/sec
HD4870	RV770	750 MHz	DDR5 900 MHz 256bit	800	1200 GFLOPS	240 GFLOPS	120 GFLOPS	115.2 GB/sec
HD4770	RV740	750 MHz	DDR5 800 MHz 128bit	640	960 GFLOPS	192 GFLOPS	96 GFLOPS	51.2 GB/sec
HD5870	RV870	850 MHz	DDR5 1.2 GHz 256bit	1600	2720 GFLOPS	544 GFLOPS	272 GFLOPS	153.6 GB/sec

The program is basically same as our demo program posted here.