I debated forever about the MOSFETs - it finally came back to - the MOSFET block sits right where (with my Cosmos) the water will enter. and makes a natural path to the neighborhood of the CPU block, so, why not? My situation is a little different, though, my problem is that I designed a very capacious development system to sit in a huge (cool) basement, whose main design criteria was to take vast amounts of heat and move it, as quietly as possible, out of the case; and then, while I was assembling it there, discovered that, even with intake filters, sawdust was gonna be an insoluble and intolerable problem (it's about the nastiest stuff you can imagine, due to having a sticky, 'cookable' sap component); so - had to move it to a small (~800 cubic foot) bedroom office, where it makes an excellent space heater; must move the heat to the basement below ASAP before summer arrives - room is already (and I've backed 'er down from 4.1G to 3.7) 78F in a generally 70F house...