Gadget Maniac said:
What is that?
Read this: http://www.tomshardware.com/reviews/intel-z68-express-smart-response-technology-ssd-caching,2938.html
It's a chipset ability to use a small SSD to cache frequently used files on your HDD, usually your OS hdd. JohnnyLucky will come around and tell you that it was intended to be used by early adapters with 10-20 GB SSDs which were too small for a full OS installation, and that anyone with a decent-sized SSD should install the OS on the SSD.
Yes, there are software packages to cache an HDD on an SSD, but the Intel RST (you read the article and already know what that stands for, right) would be more efficient. Personally, I wouldn't mess with this, but I have a 128 GB SSD and so I just run off it.