Sonnet 8x4 Silent Gen4 PCIe Card

On the it says PCIESATA does that mean I cant put gen 4 there? At the moment I have a WD PC SN530 PCIe Gen3 x4 NVMe installed on slot

A Samsung SSD that can use up to four PCIe lanes The numerical naming convention is used to define the size and functionality of the card, here is how:

gen 4 nvme in gen 3 slot Salesperson assured us that the machine has PCIe Gen 4 Samsung Magician SSD Drive test software says SSD interface is Gen 3 which runs at half

geng 680 slot BUT you go buy the off brand no name cheaper 1TB Gen 4 NVME for lets say, 70$ (6-7K read