ASRock Releases X99 Extreme11: So I Heard You Like Storage
 

We reviewed the X79 Extreme11 back in September 2012. The concept was simple: divert eight PCIe lanes into an LSI SAS chip for eight more SATA ports with SAS compatibility. Then ASRock released the Z87 Extreme11 which combined the LSI chip with a port multiplier, upping the total from 8+6 to 16+6. The X79 required two PLX8747 chips to also enable x16/x16/x16/x16 + LSI, whereas the Z87 only used one PLX8747 for x8/x8/x8/x8 + LSI.

http://www.anandtech.com/show/8609/a...u-like-storage