PCI-e ssd or ssd raid?

i was wondering what would be better a pci-e ssd or 4 ssd on a raid 0

both would be used as main drive for os

it is for a rendering rig i want to build.

thanks in advanced
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  1. The OCZ PCIe SSDs are not that good at all, and get surpassed by a single Intel SSD in terms of random IOps performance, though OCZ gives you high sequential speeds.

    There are no real PCI-express SSD controllers; so OCZ uses SATA SSD controllers and a RAID controller to interface with PCI-express. Its a solution inferior to 'the real thing'.

    Rendering files are mostly sequential access i would think, so a large RAID of HDDs would be a possibility too.
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