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BEWARE! The high wattage translates into high current which can melt wires and burn your railroad (and your house!) to the ground. Model railroad power packs have overload shutdown at relatively low amperage to prevent this. Computer power supplies may supply far higher amperage than model railroad wiring can take. In the event of a short on the layout, this current could be disasterous. Be sure to put a low amperage fuse or PTC device in series with each following linear or pulse regulator, and rate the fuse or PTC to the thinnest wire gauge you have used in that block. Also helps if the regulators have built-in shutdown for overload protection.
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