seriously your going to fry the poor card. the water cooler is only keeping the GPU block cool and theres alot more important stuff than just that block there things like the VCC chips (use alot of voltage and if overheated will fry the whole card) then theres the ram if it over heats youll get artifacts and lots of erros. its why when you buy a watercooling block it covers most of the card to keep everything important nice and cool
The 120mm fan keeps the vrm and memory cooler then the stock one did. The vrm cooling on the 7950 double d really sucks. Plus right now the 120mm fan is only blowing cool air on it, and not 70C+ air being recycled from cooling the gpu.