We did some power draw tests on the GTX 280 cards in single and SLI mode on a QX9650 + 790i SLI setup. With single GTX 280 card, the system is drawing 147W at idle and 292.2W at peak and the 3DMark Vantage score is P10324. With GTX 280 SLI, the system is drawing 190.1W at idle and 508W at peak. The 3DMark Vantage score is P15813. Stay tuned for our full review in a few days time.