We then tested the Asus video card system against an identical reference based card system and measured the drain at the wall – omitting external devices such as the monitor.
Interestingly, at idle the ASUS card consumes a little more power when idle, around 4W which rises to around 11w under full load. We would assume that this is due to the custom board design although it is hard to accurately ascertain without detailed schematics. As the card is not overclocked we would assume a slight voltage increase could be part of the reason.