8-core AMD FX-8150 + GTX 570

The new computing machine

New box with an 8-core AMD FX-8150, an NVIDIA GTX 570 and 4 Gbytes of memory at 1333 MHz arrived. After a few problems with perceus (rejected hardware address starting from 8C:…), all else appear to have worked smoothly. Started testing it with NAMD and comparing it with the i7-extreme-GTX295 machine (all measurements in nanoseconds per day) …



Multicore version (Non-CUDA) v.2.8

The multicore NAMD version used for the i7 and Q6600 machines was somewhat older than the one used for the AMD machine. To be on the safe side, subtract ~10-20% from the speedups quoted below.

AMD 8-core i7, eight threads Percent faster Q6600-based quad Percent faster
100K (ApoA1) 0.40 0.33 23% 0.19 116%
60K atoms 2.18 1.61 35% 0.95 130%
25K atoms 6.25 4.35 43% 2.53 147%
6.5K atoms 24.0 15.4 55% 9.8 145%
1.6K atoms 108 79.4 36% 48 125%
0.9K atoms 192 145 32% 82 134%



With CUDA

For the AMD-GTX570 machine and for large problems (~100K atoms), adding a line in the spirit of +devices 0,0,0,0,… significantly improved performance. This was not the case with the i7-GTX295 hardware.

AMD 8-core FX-8150 + GTX 570 i7 extreme + GTX295, four threads
100K (ApoA1) 2.33 (with '+devices') 1.92
60K atoms 5.98 (with '+devices') 6.28
25K atoms 13.7 12.2
8.1K atoms 37 25
1.6K atoms 172 166



Other comparisons

5.5K atoms → 56 ns/day on FX-8150+GTX570 (CUDA) vs. 32 ns/day on Q6600+GTX460 (CUDA)
4.5K atoms → 68 ns/day on FX-8150+GTX570 (CUDA) vs. 25 ns/day on two Q6600 (8 cores, no CUDA) vs. 19 ns/day on one Q6600 (4 cores, no CUDA)



about/benchmarks/amd8coregtx570.txt · Last modified: 2012/02/29 18:21 by glykos