It will be difficult to setup three GPUs with the MCW60 block (or any dedicated GPU block). Its also a pain to stick on (and keep on) all those heat syncs. If one falls off, it can short the bottom card and you have to remove the GPU to get it back on. If you mix some epoxy with AS5, you can use that as a glue to keep them on (removable if you use the correct glue). For this setup, I'd look into a full cover block. Its pricey, but the convenience is worth it for a TRI SLI setup.

Check out the Swiftech Komodo Series if you have the money. Some of the nicest looking and best quality blocks (IMHO).

# Komodo-GTX285-P891: nVidiaŽ reference board design P891
# Komodo-GTX285-P892: nVidiaŽ reference board design P892