It looks like IRST 9.5 has now been officially released? (This is an inference, as the page text refers to Intel Rapid Storage Technology as the latest product description, and the latest driver is shown as PV 9.5)
Unfortunately, whilst the link on the Intel website to the driver download is working, PV 9.5 is not actually listed. Maybe someone can locate and post details of the official url.
Gee, that's interesting. In the last 24-hours, Intel have replaced the site reference to PV 9.5 with PV 8.9
The new one must be close though to make a mistake like that.