Seems to work well on older Asrock H97M Pro4 boards with i5-4460 processor. I've read that PCI-E slots are supposed to be backwards compatible and it seems so. The GTX 970 card is in the PCI-E 3.0 slot, the Wi-Fi BT adapter is in the PCI-E 2.0 slot. There are no other PCI-E slots. There were no slowdowns on the GTX 970. The Wi-Fi speed is only 60Mbps, 2.4 range with 5G disabled on the router, same as the old laptop in the next room, the same distance from the RT AC68U router. UMMM of course. No problem with BT connections. I will try the same later with a newer Asrock Ryzen motherboard. EDIT 15 minutes of free time so pulled the AX200 card from an old Asrock Intel board and installed it in a newer Asrock B450M Steel Legend with a 3600X processor and a real PCIe-1 slot. USB 2.0 connector used on both boards. Please note that the front USB 2.0 port is not working, but I think it was mentioned in another post. 300Mbps with 5g and 100Mbps with 2.4 radio. This is with the same old ASUS RT-AC68U, 460Mbps on Cat5 that they paid for. The built-in AX200 BT offers a good range but is locked in the front quadrants of the PC steel case. The next map will have a magnetic antenna base. The router is behind 3 walls and 40 feet away. It's nice that the AX200 uses an m2 slot that will fit a lot of laptops like my Clevo.
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