This is one of the dumber requests I've seen. Motherboards are necessary for mining, does that go in "Mining Equipment" or "Computer Hardware"? If I want to buy a GPU for gaming, I'd consider that "Computer Hardware". With the exception of ASICs, all mining equipment IS computer hardware. You may as well be asking for a "Goods" and "Other Goods" forum.
If I want to buy or sell non-ASIC/FPGA hardware, it's almost impossible to find, or get noticed, because you get lost in the mining hardware noise.
In favor of splitting off as suggested.