= Perfomrance comparison of GPU boards from AMD as of Oct 2009 =
We have tested GPU borads from AMD with our test code implementing a simple N^2^ force evaluation algorithm.

 * Nominal performance of tested GPU boards
|| 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 ||