I am interested in this answer as well. Mainly, does cooling the gpu give better hash rates?

I had an XFX 7950 that ran hot (around 90-95c) all the damn time no matter what I did. But even when I could get it down to the 80s it did not churn out any better hashes. I have my 290xs running at a stable 85c. I have them opened cased with forced air cooling. Would cooling them further produce better hash rates? I was thinking about water cooling them as well but I do not want to put in the extra money if it will not help increase productivity.

I was also looking into submersion techniques as well. But if it is not going to increase my productivity then I do not care. Anyone got any answers on whether cooling gpus increase hashrates?