I also agree..
In order for a 5850 to match a 5870 it needs to be clocked at 915/1265 give or take. The DirectCU can do 1000/1300 or better if your room temp is low enough.http://i683.photobucket.com/albums/vv199/OvrClkr/BC2_70F_ambient_1000_1300.png
Daily Clock until Winter arrives..http://i683.photobucket.com/albums/vv199/OvrClkr/74F_BC2_900_1250_122v.png
And the best part is that it is cheaper than most other models and comes with a nice 20.00$ rebate if purchased from the Egg.