0.9J/GH = 0.9W/GH/s
850GH/s * 0.9W/GH/s = 765W


So...

I got my tube and put a 105A 1250w powersupply to it, with individual cables to every pci power connector (total of 8 cables). Ambient @ 16c and the results so far at 290MHz has been very promising as seen in the picture, also I have push - pull fan configuration...

http://i61.tinypic.com/muwsvb.jpg

Have anyone clocked it to 300? and what are the hw errors at that rate?