MSI X99A Présentation Rapide page 34

M.2 slots with examples of various combination possibilities
The combination possibilities below are set up in empty PCI_E6 slot condition.
1xU.2+ 1xM.2 PCIe 2.0+ 8xSATA
PCIe 2.0
1xM.2 PCIe 3.0+ 1xSATAe+ 8xSATA
PCIe 3.0
SATA Express
24
Overview of Components
SATA9
SATA10
SATA9
SATA10
1xU.2+ 1xM.2 SATA+ 8xSATA
SATA
1xM.2 PCIe 3.0+ 10xSATA
PCIe 3.0
SATA6 SATA5
SATA9
SATA10
SATA9
SATA10