Here ya go Dom ... not sure about b-stock GPU's 
 
but this is a comprehensive list of GPU's based on their current max boint potencial 
 
ao the higher it is on the list the better return you will get reguardless of where you place ..... sort of Boint for the buck , if it were 
 
http://www.overclockaholics.com/foru...ead.php?t=2509