Hp z640 NVMe PCIe Crucial card on PCIe expansion car

Buy Transcend 512GB SSD NVMe PCIe Gen3 x4 110S, Solid State nvme gen 4 in gen 3 slot 5 Place that in PCIe slot 4 which is a PCIe generation 3 slot with x8 electrical lanes The card is PCIe3 x4 Note that the nvme m2 ssd slot 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 But

nvme slot Gen 4 is faster than Gen 3