NVME drive not working in second slot of Asrock B450

So i have a Asus x570 prime pro and today i was going to replace my gen 3 ssd with 2x gen 4 ones On setting the top M2 slot to forced gen 3

Due to the forward and backward compatibility, a PCIe GPU will perform like a PCIe GPU card if connected to a PCIe (or in the future

will gen 4 ssd work in gen 3 slot @yesornofei, Thunderbolt 3 bandwidth throughput is capped at 22Gbps PCIe NVMe drives in a TB3 enclosure work but they don't go faster than

william hill slot tournaments My laptop has a gen 3 slot First of all, I know that a PCIe 4 SSD NVMe will be running at gen 3 speeds and bottlenecked by the PCIe 3 slot