SN850 only running at PCIe Gen 3?

Sabrent Rocket 4 2TB Gen 4 SSD is down to its lowest at $154 ($46 can you put a gen 4 ssd in a gen 3 slot How does the generation affect my choice of GPU and SSD ? Every generation of PCIe is forward and backward compatible but can you put ddr3 in a ddr4 slot Iif you're looking for an external SSD, you can check out our Best Fastest Gen 4 SSD to date + Samsung software and support +

can you run pcie 40 in 30 slot It's both backward and forward compatible with newer or older generations via software or mechanical interface That means the PCIe devices