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It isn't because of the drive, as Geekbench doesn't take the hard drive into account at all. It's likely due to the memory.

Interesting. I was basing that assumption on Floodly's scores of 5927 with 4GB v. 6034 with 8GB in the same machine.
 
Yeah, that doesn't seem like enough of a boost to spend $100 to me.
Protools won't use more than 4 gigs right now so, I'll stay with what I have.
Thanks for the test tho!
 
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