Fan control

For anyone who cares:

This is apparently a tough thing to do if you run Vista32 and have SLI cards.  RivaTuner simply doesn't support SLI with the current Vista drivers, and therefore will only change fan speeds on one card.

The solution I've come up with is to use the nForce System Tools (beta) 6.00.  With this, you can control both card's fan speeds, save profiles, and then specify rules of when to load the profiles.  The biggest problem is that some of the arguments that you set in the rules have no effect at all and are completely ignored.  I've found that the best argument that you can set is actually the CPU activity.  I have my GPU fans set to run at 40% when the CPU has been inactive (or under little load) for more than 30 seconds, and to ramp up to 75% if my CPU has been active for more than 30 seconds.

Yes, it's a pretty crude way to go about setting fan speeds, but it seems to work well.  I wish the GPU temperature argument would work (I haven't had any luck with it) because that would be a lot better than linking GPU fan speeds to CPU activity.