Intel updates the DX79SI with the DX79SR
 

If you remember, when Intel initially revealed the X79 chipset it was said to feature additional SAS ports which over time were meant to be additional SATA ports, but in the end the chipset arrived with no extra storage interfaces at all. Even though Intel was expected to remedy this with a later chipset revision, this doesn't appear to be the case anymore, but Intel has decided to issue a revised version of its DX79SI motherboard with additional connectivity in a couple of areas.

http://vr-zone.com/articles/intel-up...9sr/15785.html