I should add now that they have unlocked voltage i will be looking for what these cards can do with a true full cover block on them.
Likely we will be waiting for those to even hit market however.
for instance at fairly high OC's and a good amount of MV my 290's never get hot on my Full water loop & Under load when i was benching i think they hit max 50*C core and under 50 on the VRMs (likely 35-40*C).
Realistically that All in one Water cooler is like puting a H80 on your GPU and calling it watercooled.
I never expected that solution to do much for anything other than Stock and a little overclocking anyhow.
What shocks me is the Power consumption changes 150 Extra Watt's power draw is quite alot really.