Here's a 4 core Woodcrest system with 4 sticks of 2 GB 667 MHz FB-dimms:
Function Rate (MB/s) Avg time Min time Max time Copy: 4813.2590 0.2663 0.2659 0.2675 Scale: 4826.2181 0.2656 0.2652 0.2662 Add: 5244.0135 0.3664 0.3661 0.3669 Triad: 5244.3106 0.3665 0.3661 0.3671 This was a pathscale compiled stream executable with openmp using 4 threads. Thanks, -- Jason Holmes Bill Broadley wrote:
I have a theory that the 533 MHz FB dimms have a severe performance penalty on 1333 MHz FSB. Does anyone out there have a 1333 MHz FSB dual woodcrest (pick your vendor) with 4 667 MHz FB-dimms? A 1066 MHz FSB with 4 533 MHz dimms would also be interesting. Could you run: http://www.cs.virginia.edu/stream/ ? Ideally compiled with a F90 or C compiler (Intel, Pathscale, and I imagine many others) that support OpenMP so you can run 4 threads (one per core) in parallel.
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