Sandra CPU
Very interesting! This may explain the rash of "a bit slower at stock" results for the MSI Eclipse X58.
Judging by the Sandra CPU tests, it looks like the MSI BIOS might not be kicking into "Turbo" mode, keeping the multiplier at 20, whereas the DX58SO seems to be upping the multiplier.
Needless to say, the MSI Eclipse X58 is slower at stock, but faster overclocked.

Sandra Memory Bandwidth
Again, at stock the MSI Eclipse X58 is a bit slower, and this time it is also slower when overclocked due to the higher DDR3 speed used on the DX58SO test.

Sandra Latency
Interesting - the MSI Eclipse X58 had a better (lower) latency at stock, but tied when overclocked.
