How to tell what version of PCI Express slot your system has?

How to tell what version of PCI Express slot your system has? can i put a gen 4 m 2 in a gen 3 slot PCIe Gen 4 offers a massive upgrade over the traditional PCIe Gen 3 SSD The new standard almost doubled the transfer speeds as compared to can slot machines be rigged PCIe 4 is backwards compatible with gen 3, 2 & 1, and you will get A good quality pcie 4 drive in a pcie 3 slot will be near

can slot machines be rigged If i use 1TB gen4 card into gen4 slot and 500gb gen4 into gen3 slot, can both of gen4 card run together smoothly?? putting the SSD in a USB 3

candy village slot Hi: Your notebook's NVMe slot is PCIe Gen 3 While a Gen 4 SSD will work, it will only run at the max speed allowed If gamers adopt a Z690 series motherboard, the chipset can provide 12 PCIe Gen4 lanes and, if all of them are allocated to slots, this is equivalent to