Not trying to take away any glory from Adamantine with his wind tunnel, but I got rid of mine today and built my new cooler...
With the wind tunnel the ram chips at the far-end got warm but with this new design I've spaced each 60mm fan to blow on each half (the 4 ram chips) of the Dimm.
Now these Sanyo-Denki 60mm fans are excellent - they push 23CFM each and when you put your finger around the dimms it's freezing cold from the low->high air pressure created by these small beasts!
I've run memtest #5 for hours and the memory chips are still cool to touch and not even warm.... so is the heatsink on the ddr booster!...
Here's some pics of the cooler I've made by putting two fans together and soldering the cables up, it's nothing special but it covers 4 dimm slots (+ ddr booster) - I'll use this on any future memory that runs hot...
Cinders.