SandraÂ’s memory benchmark takes full advantage of the two memory controllers found in our dual Opteron 275 and dual Opteron 254 systems, with the 254Â’s higher frequency giving it a slight edge over the slower 275 rig.

The dual Xeon rig turns in abnormally low scores, considering it uses DDR2-400; the single Xeon 3.6Â’s memory performance is what weÂ’d have expected from the dual system as well. In this case, the dual Xeon 3.6Â’s low Sandra memory bandwidth appears to be a bug rather than an indication of a problem. Other memory bandwidth tests (including Sciencemark and Everest) returned significantly higher results than SandraÂ’s, and our other benchmark results gave no indication that the dual Xeon system was suffering from abnormally low memory performance.

Linpack performance

Linpack is a concise test of L1, L2, and main memory performance packed into a single graph. The test is only single-threaded, so we're only reporting results for the single-CPU configs.