can i use m.2 pcie 4.0 in 3.0 slot
MAXSUN Arc B580 Graphics Card with Two M.2 Slots Pictured in the ...
If you have a desire to add a PCIe M.2 drive, it will allow you to do that, but you have an additional 3.0 x4 slot from the CPU to use as you see fit.
OrangePi RV2
Rockchip RK3588 8-core 64-bit processor，4GB/8GB/16GB LPDDR5，1* PCIe extended 2.5G high-speed network port，1* M.2 M-Key slot (PCIe 3.0 4-Lane) ...
Bo mạch chủ Gigabyte Z790 UD DDR5 (M-ATX, LGA1700) - Full VAT ...
Khe cắm mở rộng: 1 x PCIe 4.0 x16 Slot (PCIE1), 1 x PCIe 3.0 x1 Slot (PCIE2) ... Khe cắm mở rộng: 2 x PCIe 5.0 x16 Slots, 1 x Vertical M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe WiFi module.
Mainboard ASROCK B550 PG Riptide | Tứ Gia Computer - NPP Wacom ...
Socket: Intel LGA1700Kích thước: microATX Khe cắm mở rộng: 1 x PCIe 4.0/3.0 x16 slot, 2 x PCIe 3.0 x1 slotsKhe cắm ổ cứng: M.2_1 slot (Key M), M.2_2 slot (Key M), 4 x SATA 6Gb/s ports.