For reference, the current standard is PCIe 5.0 which was introduced in 2019 and has since been adopted by the best motherboards with compliance for DDR5 RAM, meaning far superior ...
It has a single PCIe X4 slot, but the slot is open-ended — this means you can still connect an X16 card to it. Pineboards connected an AMD Radeon RX 460 GPU (the specific card appears to be made ...
As long as you accept needing to supply external power with even a low-end GT 1030 card ... used also offered PCIe, the same card was run in a PCIe x4 slot, as well as in an x1 configuration ...
PCIe x4 and x8 cards can draw up to 25W from the motherboard's slot, while x1 cards are limited to 10W unless configured as a 'full-height' or 'high-power card' to pull the aforementioned 25W.
There are two M.2 slots available—one that supports PCIe 5.0 x4 and another that supports PCIe 4.0 x4—plus a PCIe 4.0 x16 slot and an extra PCIe 4.0 x4 slot for additional expansion.