Post by Chris Mellor (thank you) over at El Reg
WD will demo PCIe-connected disk drives at the Computex tech conference in Taipei, using a SATA Express interface.
SATA Express has been enabled with partners, and is offered on Intel series-9 chipset motherboards. WD says it provides a route to faster speeds and lower power consumption. SATA’s fastest speed is 12Gbit/s currently. PCIe v4.0 provides 15.754Gbit/s per lane. Gen 3 provided 7.877Gbit/s per lane.
Read on here