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Now that Intel is shifting processor production to low-power cores that consume as little as 20W, there is no longer a real need for BTX. Also, if you are building a system that you want to look as clean as possible that is, with few visible wires snaking around the motherboard , look for a board with its fan and USB headers placed around the edges, and SATA and USB 3 header ports that point to the side, rather than sticking up vertically. Any motherboard provides expansion slots, but motherboards differ in how many slots they provide, and of what types:. Edit Options History.