KitGuru tried the ASRock Z97 Extreme6 Motherboard (w/ Samsung XP941 M.2 SSD)
A quote from the article:
Packed to the brim with modern, high-speed storage interfaces, ASRock agrees that storage connections faster than 10Gbps are relevant in today's market. Utilised on the Z97 Extreme6, ASRock's Ultra M.2 connection routes four PCIe 3.0 lanes from an LGA 1150 CPU to provide a storage interface with up to 32Gbps of bandwidth.ASRock Z97 Extreme6 Motherboard Review (w/ Samsung XP941 M.2 SSD) @ KitGuru