Even with your ram underclocked and under utilized, I would strongly suggest ensuring that the rest of the card (especially the power regulation circuitry) gets some cooling. If you have one of those side panel intake fans blowing over the PCIe slots then I wouldn't worry about it too much but otherwise it might be time to start case modding 
The thing that make me cringe about the H50 and H70 (and to a lesser extent other pump on waterblock combo kits) is the mass of all that stuff hanging from a videocard not designed to hold up much weight. Obviously this is only a problem if the system is housed in a tower case.
The thing that make me cringe about the H50 and H70 (and to a lesser extent other pump on waterblock combo kits) is the mass of all that stuff hanging from a videocard not designed to hold up much weight. Obviously this is only a problem if the system is housed in a tower case.
The heat exchanger/pump module is really small and relatively light, muuuuch lighter than aftermarket GPU heatsinks. The bulk is in the radiator, which is supported elsewhere.
