BTF3.0 (via Uniko's Hardware) is designed so that no cabling is needed between your PSU, motherboard, or graphics card, ...
When attached to a motherboard's PCIe x16 slot ... it will typically have additional power connectors to supply the necessary energy. Plugging a 6-pin PCIe power connector into the graphics ...
The power supply blows air over the CPU ... but to place all the connectors directly on the motherboard. Prior to the ATX, only the keyboard connector was attached to the motherboard.