A computer tower needing an external power supply. There is nothing behind the power supply "cutout". Basically a laptop motherboard in a case. Also, the card slots aren't removable. : r/techsupportgore
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H100 TG
CiT S012B Slim Micro ATX/ITX Case for 300W Power Supply Unit with Built In Card Reader - Black : Amazon.co.uk: Computers & Accessories
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APEX MINI ITX Small CASE MI-008 BLACK PIANO Glossy w 250W Power Supply Built-IN 835712004561 | eBay
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Segotp Rtx Gaming PC, 240/120 Radiator, 8*12cm Cooling Fan Position, Acrylic Side Panel, RGB Gaming Desktop Chassis, Power Supply Down Mount PC Case - China Transparency Side Panel and Case price
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Build a PC - How To Install a power supply ( PSU ) with Scan 3XS - YouTube
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Teardown of a PC power supply
