Judging from what I'm remembering of his toys:

I'm assuming oP's going for a JackHammer/RAID 0, Rocket (DSP DaughterCard?) GreenRadiusPixelRocket configuration. Now that he's got the ATX PSU hacked into the original IIci sheet metal, he feels the need-for-speed and the greed for . . . pushing it hard enough to make it sweat a bit.

That's a lot of iron in that thar IIci . . . have you got another PPC PDS Card up your sleeve or on the way, oP? [] ]'>