mATX I stuck: for this it was necessary to expand the cutout for the bar. I flattened the brackets for screwing the card, drilled 1 new leg for fixing the board (there is nowhere else). I pasted strips of polyurethane foam on the platform under the motherboard, and put the motherboard on them, securing it with a single screw. Holding on. But in this version, there is no space left for a 3.5" hard drive, and the SSD simply lies around the power supply. It is more difficult with a video card: a full-sized one can only fit into a regular place from the very edge, since it must be placed on the side of the main fan. But for this, on the motherboard the third slot from the processor must be PCI-E x16, and this is extremely rare. Either a single-slot video card, or cut a hole in the case for its installation in the first slot of the motherboard (but it still has to be short).
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