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Benchmark

Xeon E5620 (rc02, 3 channels, 3x4GB)

Opteron 6134 (4 channels, 4x4GB @ 1333MHz)

Xeon X3470 (2 channels, 2x1GB @ 1333MHz)

Xeon X3470 (2 channels, 2x1GB 6x4GB @ 800MHz)

Notes

bw_mem -P 1 -W 2 268435456 (read / write / copy)

11995
7013
4288 MB/s

6660
4100
2750 MB/s

11292
6500
4050 MB/s Cannot

do. BIOS does not support
setting memory frequency. 11293
5146
3414 MB/s

The Lynnfield 800MHz case is important, as
 once we have >= 24GB RAM, the memory clock drops significantly.

bw_mem -P 4 -W 2 134217728 (read / write / copy)

19000
8750
5950 MB/s

22000
11820
7400 MB/s

17900
6850
4600 MB/s Cannot

do. BIOS does not support
setting memory frequency. 11080
5169
3397 MB/s

AMD case used taskset -c 0,1,6,7 to exercise
all memory controllers.

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