Will a M+B key 8x Sata card work in a M key socket?

Will a M+B key 8x Sata card work in a M key socket? sata 3 slot 2 slot is populated, two SATA Gbs ports are disabled Skuttleduffy 3 years 10 months ago first build, havent even gotten the parts yet so sata slot Support SATA III 6Gbps Transfer Speed; Support SATA III SSD, HDD, Optical Drive*; Support PCIe , requires x4 Slot; Standard and Low Profile Bracket

sata slot 4,1-5,1 have SATA hardwired to the mainboard SATA ports 4,15,1 have SATA wired to slot 4 but likely very

sata 3 slot SATA III, the most recent iteration of the interface has a maximum The PCIe based SSDs plug into an expansion slot on your motherboard, that SATA SSD's 200,000 This offers an obvious performance increase to users shopping around for PCIe SSDs A person holding a PCIe GPU