PCIe 4x? does it need the 4x? ie, will running it on a single PCIe lane hurt performance?
i have an onda mining board with 8 full size 16x slots but i believe they run in 1x mode, so any PCIe ->m2 adapter card would run at 1x.
It costs next to nothing, basically only traces, all the logic is synthesized in the FPGA. Gives the board other uses besides mining.
The reason why old ZTEX boards have much better resale value than the old mining-only boards from ngzhang. His Lancelot & Icarus boards were really crippled by not having any way to get signals to the IO pads of the FPGA. They had only 2 (out of 8 available) signals connected between USB USART chip, greatly reducing available bandwidth and protocols. Similar weak connectivity was between the two FPGA chips on the board. It makes the whole board unusable for anything else, not even toy projects could be reasonably built on them.