Yousuf said:
Hopefully never! That's the last thing we need, another point of
failure in our computer systems!
Let me add to this; active cooling is ALWAYS a bad thing. It uses up
more power, it introduces more points of failure (as Tony mentioned),
and perhaps most obnoxiously in case, it probably adds to the noise in
the room. Small fans generally run at high RPM, and make an awful
racket.
For memory that does need such a thing, such as some initial FBD based
systems, I'd recommend a huge 120mm fan running very slowly.
DK