Intel's SRT uses a small SSD (up to 64 GB) as a cache for the hard disk. Or just the first 64 GB of a larger SSD. Per this Intel document this needs a Z68 Express board and Windows Vista or 7. Various sources say the 2011 iMacs use the Z68 chipset.
Is this supported, or an equivalent feature, on any current Mac? If so, where can I read more?