Smart Response is for teeny SSD'shttp://www.ukgamingcomputers.co.uk/difference-between-h67-p67-z68-and-h61-chipsets-a-22.html
Finally, another feature of a Z68 chipset is known as SSD caching which is where it allows the use of a small (say 10 or 20 GB) Solid state hard drive to act as a cache for a larger ‘traditional’ hard disk. If you are already planning the use of a Solid State drive this feature is redundant.
Any potential usage in a hot swap bay for moving large files or system images quickly ?
Back up boot drive in case 1st bites the dust ?
Game storage ?