Thinking of getting it enabled after getting the SSD installed again, and I have indeed wiped the Windows install and did it all over again, installing into the HDD first while in RAID mode.
The thing is, well, the Accelerate tab isn't showing up at all in Intel RST. Neither does the option to do so in the Peeformance tab within Intel RST.
Any idea what went wrong? (Figured that this might need a new thread.) system specs in signature, and the SSD in question is a Kingston HyperX Fury 240GB (got it because it was the cheapest I could find - indeed, when the last one was being used as the system drive, things felt fast - this is actually the warranty replacement.)