No way.  At the most you would probably pull 650W at the wall ...unless you are running other peripherals I am unaware of.

I highly suggest getting a kill-a-watt meter from Amazon or newegg or wherever.  You can find them around $20 and well worth it.  I have one on each mining rig to monitor my power consumption.

ps. a little while ago I called evga about their power supplies, and asked Jose from EVGA how much can I pull constantly from the supply safely.  He suggested 80% of max rating.  Going my that theory, you could safely pull 800W constant without worry.