Why does it have a B after the GT?
http://www.overclockers.co.uk/showproduct.php?prodid=GX-126-LT&groupid=701&catid=56&subcat=1008
http://www.overclockers.co.uk/showproduct.php?prodid=GX-126-LT&groupid=701&catid=56&subcat=1008