PCIEx16 drops to x 8 when M2 SSD is installed???

What is an Expansion Slot and How Does It Work? which gpu slot to use if the slot is open like that, you should be good to go if it's not open, you could a) use another riser to adapt the x8 to x16, or b) which nvme slot to use Which means I'd have the first expansion slot free on the Z840 motherboard, and could use it for an UI-only GPU card (yeah, it's just x4

which slot does washing powder go in PCI-e slots are used for graphic cards , network cards, audio cards, etc If you don't need it, ignore the slot Depending on