Most Cooler master PSU (non-OEM Seasonic PSU) are average in terms of quality and performance . Afaik , AMD 7970 load power consumption is 355W ,Your PSU won't cut it ( not even close )
I recommend an excelent PSU like this one :
http://www.newegg.com/Product/Product.aspx?Item=N82E16817438007
I recommend an excelent PSU like this one :
http://www.newegg.com/Product/Product.aspx?Item=N82E16817438007
Laptop: (Show Spoiler)
Mini PC :: (Show Spoiler)
