HP Z2 G4 motherboard question about slots

What is E-Key and what goes in it? The question should be self explanatory I'm buying a Z170 motherboard that has 2-E SSD :)

Buy ZEBRONICS ZEB-H81M2 with PCIE NVMe Slot Motherboard only for Rs 5399 from Only Genuine Products

motherboard m2 slot Yes 8x = 16x Its not stated in motherboard manuals because it isn't a motherboard limitation, the limitation is on the CPU You need to

book of dead online slot 2 slot is usually filled by an M What Does the NVMe Port Look Like? nvme slot on a motherboard Image Credit: Newegg StudiosYouTube