Overclocked GPU Temps okay?

Hey guys, i recently overclocked my Asus HD 7850 to 1050MHZ Core and 1450MHZ memory. Under load i get aroun 65 degrees and idle is around 40 degrees. Note, this is the dual fan versin of the card. Are these temps okay? I havent touched voltage but just wondeirng if tehse temps will be safe. Cheers