I thought that IRST was a thing of the past. It was an available download for a Z68 motherboard I used to have back in the day. One of the neat features of IRST back then was the ability to take a 60GB or smaller SSD and use it as a persistent cache to the main drive for fast booting and fast access to one's everyday programs. Looking at some 300-seies boards today, I see that IRST is again offered as a motherboard download utility. Is that "SSD caching" feature still part of IRST's repertoire? Or has it been eliminated?