http://www.anandtech.com/show/4329/intel-z68-chipset-smart-response-technology-ssd-caching-review/2But there’s one more feature I left out of my Virtu preview: Z68 also supports SSD caching—the ability to add a small solid-state drive to a system already running a larger mechanical disk with the purpose of speeding up read performance of data cached to the SSD. The target market for this feature is probably going to be somewhat limited. However, for the folks who can’t afford 80 GB or larger SSDs and still need extra user storage, caching does work…and pretty painlessly, too.
If anyone is thinking about doing this, DO IT! I seriously recommend it

Didn't notice anything with games on first load as the info needs to be cached to the drive, but battlefield 3 for example when I loaded it again it loaded up incredibly quickly. It felt like my 1TB was an SSD drive, on multiple rounds I was the second person to join the server and I wasn't sitting about yawning waiting for it to load. Windows booting was also hugely increased.
Anyone else used their ssd drive as a cache?