content: Maybe. You're talking about putting 200V onto lines that are expected to only ever see 5V. What will actually happen depends on  the exact design of your components (which in turn depends on the paranoia levels of a hundred different hardware engineers spread across a dozen companies) and on the exact way you built your rig. Tl;dr fuck knows, try it and see. Your results will still mean nothing unless you build a large number of identical test machines and still won't generalise to other hardware.