HighPoint’s RocketCache

HighPoint RocketCache 3240X8 brings affordable SSD Performance to Terabyte Capacity Storage - $154.99 on Amazon.

It’s tough to wrap your head around HighPoint’s RocketCache, so we’ll try to sum it up as being simply crazy performance, if you’re willing to deal with the configuration hassles.

The RocketCache is a x8 PCIe 2.0 card that lets you connect up to four SATA devices to it via a Medusa-like cable with four SATA 6Gb/s connectors on it. The card lets you run two HDDs with two SSDs for caching, or—more crazy—one HDD with three SSDs for insane caching.
— maximumpc.com