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NAMD 2.7b1 on an i7 965

We compare eight threads vs. four threads vs. the performance obtained from a Q6600-based quad. All measurements are in nanoseconds per day and were made with an SMP-aware executable of NAMD 2.7b1 using the flags '+setcpuaffinity +LBSameCpus'. Details of the examples used can be found here.


i7 with 1033 MHz memory

i7, eight threads i7, four threads Q6600-based quad Percent faster
100K (ApoA1) 0.65 0.51 0.37 75%
60K atoms 1.61 1.45 0.95 69%
25K atoms 4.35 3.85 2.53 72%
6.5K atoms 15.4 15.4 9.8 57%
1.6K atoms 79.4 75.2 48 65%
0.9K atoms 145 125 82 76%

Changing the memory to triple-channel at 1333 MHz didn't make much difference unfortunately (approximately 5% faster) as I should have expected given the small memory footprint of MD jobs.

about/benchmarks/namdv27b1_i7.txt · Last modified: 2010/05/01 18:10 (external edit)