Single Core2Duo Quadcore vs. two dualcore Xeon?

Hello

I'm in the process of purchasing a new server. I'm currently looking  
at two Supermicro based options, one with a Core 2 Duo Q6600 Quadcore  
2.4GHz 2x4MB (on a PDSMi+ board) , and another with two Xeon 5110  
dualcore 1.6GHz 4MB (on a X7DVL-i board).

Both configurations would have 4GB (2x2Gb) memory (to begin with, 4  
slots on the boards so max 8GB), and I'm thinking about 4x 500GB  
disks in a raid10 config on a 3Ware 9550SX.

What my question is, from the performance point of view, what would  
be best? Two dualcores or a single quadcore? I'm thinking about  
memory bandwidth and such... Bus bandwitdh (to ethernet and disks)...
Looking from the upgrade point of view I guess two dualcores can be  
replaced with two quadcores, but on the other hand, if that will be  
necessary  then another box is probably a better solution...

Is there any known problems with FreeBSD and these stuff? From what  
I've understood Supermicro is pretty FreeBSD-friendly and should work  
fine...

The box will be used mainly with a jail running MySQL and Apache 2,  
and a number of other jails which will take fare less power... So  
mainly mysql & apache.

If someone have any clues about which system performs best, or any  
other input, everything is appreciated!

Thanks

--
Johan Ström
Stromnet
[email protected]
http://www.stromnet.se/


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