I run VMware Server on a Fedora 10 based machine and compared to another machine running VMware Server on Win 7 x64, performance (at least as in user responsiveness in Windows guests) is significantly worse under Fedora 10 I've found. I have played with a few performance settings without much luck.
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Christian
#40104192 120Gb (no longer in my E36 M3, won't fit the E46 M3)