Ok as I write this text my m8 is starting to test brand new 4850 which shiped about 40 minutes ago. I got 1 bad message about It , we got a refference card with stock cooling which Youll see in lot of cards on the market, my advice is wait before You BUY them, find some with manufacturers cooling!! Our test card after boot up had ~68C and with full load ~85C...
We had some issue because memory temps went high in just a minute and that isnt normal.
We had to change thermal paste!!
After providing some AC silver 5 temps went down but this isnt good for the start on the market...or maybe its just our card... So unless You want to change the paste after buying just skip refference cooled cards...
I know these temps may not see that high but I dont know what are safe temps for 4000 series!!
Anyway Ill provide some results later Im waitng to get my hand on this baby
