Ok heres the Unigine score, All maxed out as in the pictures. Later I'll upload some 3dmark scores...btw I'm on catalyst 13.2 beta3 driver.

Stock single HD7970 (925/1375):


Oc'ed to 1250/1650 @ 1.275v:


so its ~14 FPS improvement for free, lets see how HD7850 do at extreme tessel.

^ Water cooled system..max temp for above session was 47degC for OC. For stock clock I think maybe a little lower around 43degC