Hard to know what the correct value for these CPU should be.
The x4 641 is part of AMD's fusion CPU range. (The naming is strange in our opinion as the CPU isn't a fusion with a GPU)
It seems like most the fusion CPU range has issue in the benchmark tests. They have jekyll and hyde like behavior. Some examples benchmark really well, other fairly poorly.
We suspect this is due to a CPU bug, but can't be 100% just yet. More details are here,
http://www.passmark.com/forum/showthread.php?t=3656
Update 4/April/12: Turns out there is a CPU bug, and the BIOS patch to fix the bug causes the performance problem. It effects only half the Fusion CPUs, as only about half have had the patch applied in BIOS. See the post linked to above for more details.
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