^^Bcoz its got a better customer support and runs cooler than the Palit's basic HD4850 model (not the Sonic+)
not so much is the case with HD4850 i know two of my friends at different places bought sapphire HD4850 a week before ..and face the problem of heating ...i bought the palit near about then along with many fellow digit members here ...they don't face any heating problem...
even before ...most of the heating problem that ever came.....came from sapphire HD4850 ...just check the net ....now the sapphire has come up with a dual slot cooler model ..which might run cool ...but again that costs 11k ...while palit HD4850 costs about 9.7k ...
so sapphire here is not as good as palit ....atleast in this case...it has better name cos it the oldest ATI partner ...support at my place in bad for sapphire but good for gecube/palit cos they are distributed by tirupati ..and their serivces are more or less same..and in general quite good compared to other distributors... wherever they have offices ...
and yes even the new palit comes with a dual slot cooler fan ....