A Solid State Drive like a CF in a SCSI Adapter would only take 1/2 a watt.
The SE Power supply is already stressed by powering up the analog board, the CRT Tube, the mother board and things on it like an add-on board, the drives, and the keyboard and mouse. Many people are in the belief that it was designed to handle such a load, when in fact it was designed to just barely handle such a load. So the system is already stressed out as soon as it comes out of the box.