Your unlikely see any improvment in performance with hard drives let alone optical drives because the technology hasnt caught up with the limits of sata II, but they probably will in the future although we will all be on sata III by then, but you might as well go for sata II connections theyre not generally any more expensive.

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Q6600-P5K Premium+Alphacool w/blocks
EVGA 8800gt+Koolance w/block
Samsung f1 raid0 +f2 hard drives
Enermax infinity 650w

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