im currently using multi 7950`s, and only change i noticed was +3-5c. running them at 1100/675...
think i need some risers tho cause the first card in both rigs is running at 88c while the other is at 74c
Try tightening the screws on the heatsink assembly
Also check in CGminer (or AB) that your fans are running at the same RPM.
One of my cards runs at 2000 rpm @ 39% fan where as all of the others run at 2150-2250. The low RPM card was obviously always hotter than the others, until I bumped up the minimum fan to 42% in cgminer for that card. Tightening the heatinsk assembly was also worth about 2-3 degrees as the screws had loosened a little.
77% fan speed on the low temp cards and 99% on the others, i think its just cause there closed in so tight, have a wifi card in between, only place i could fitt it
was thinking about getting watercooling for them but rly dont know much about it or what to buy, noone seems to have a complete pack, atleast not in norway