again that all depends on the computer adn what it is used for, if you run a dedicated os disk then that and the swap file will under most uses not use the full bandwidth of the drive.
if you run raid systems then you are already dividing traffic between drives in one way or another.
i use a 72gb server disk rated at 15k rpm, it is almost as fast as an ssd in its own right, that is used exlcusively for my os and swap file.(perks of working with it)
i also have a raid array consisting of 4 disks of 500gb(recently upgraded from 2) with full striping, my redundency lies in a server, i upload any important files to that, it runs some older disks in raid 1, 2 seperate arrays.
i also have a couple of esata drives that i use in both systems, they should theoretically be the same as an internal sata drive, they feel like it as well, i use them for stuff i need both places but not frequently enough to warrant 2 copies, i am an absolute derp when it comes to filling drives, i have terabytes of old data layered upon old data, i really should clean at some point
i wouldnt have a need of a dedicated drive for my swap file, the performance gains from raid 0 are small enough to begin with if ones stripe size is on the small side then that makes the problem worse.
the only improvement i could think of would be a full solid state system, that however is far too expensive compaed to the performance gains, my laptop doesnt feel faster despite the ssd so i think i am at the limit of what actually matters to me
that said i would love to see some benchmarks of the pc when it is done and to see some pics, nothing like a little pcb porn, what stepping are the ram?
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//through chaos comes complexity//
the scent of the tamarillo is pungent and powerfull,
woe be to the nose who nears it.