Apple’s new family of iMac all-in-ones released earlier this week boast an Intel BD82Z68 platform controller hub that isn’t scheduled for release until May 11th. The Z68 chip, designed for Sandy Bridge 1155, was first discovered by TonyMacx86 and later confirmed in an iFixit teardown.
The Z68 allows for solid-state drive data caching when a system is equipped with a combination of storage drives. So users could install a small, relatively cheap SSD along with their traditional hard disk drive and have the SSD serve as a cache – dramatically increasing access speeds to their files and applications. The new iMacs can be ordered with both an SSD and a traditional hard disk drive installed, and the Z68 can allow users to see this combination as just one drive on their Mac.