I cooled my Perc5i card using the Koolance CHC-122 MB for awhile. Now, while it is not necessary, I found that having just a large heatsink on it was not enough, so it was either water cool it or use a fan directly on it. With my current loop there is not an easy way for me to integrate it into the loop, so I am using a fan at a low setting which isn't loud. The main issue is how to mount it. It looks like you have push pins that go all the way through the PCB, so it should be easy, mine only had the loops which is why I did the CHC-122 block. For what it is worth, the Enzotech will work also. Here is a couple pics of what it looked like when I had it setup.





As far as the memory goes, again, not necessary, but it does reduce the fan noise. A single 120mm rad should be more than enough for both.