Great, but if the OP is like me, he probably want's his card to last more than a month. Besides, no matter how fast you clock it the 5850 has less texture units, less shader units and less memory bandwidth. Oh and it can be overclocked too.
Newegg has pulled all Asus 5850's even though ALL 4 models had/have a great track record.Maybe that's possible with that Asus card which is clearly designed for that. I'm sure it costs more than a regular 5850.
My XFX runs 55c under load at 775/1125 on stock volts in a 80f room.
I hope it lasts you, time will tell. Newegg pulled the Asus cards for some reason, hope it wasn't failure rate.