I was looking at getting the new Swiftech H20-120 h20 kit and want to get a 6800 vid block, but theres does not cover the RAM like the DD block does. I was wondering that since it is GDDR3 if it really needs active cooling or if some sort of RAM sinks for just passive cooling will do the trick. I dont OC it to high just to Ultra speeds. Any answers are greatly appreciated.