I am Not a Geek dot com have posted a review of the Asus v8200 Pure GeForce 3 graphics card. Heres a snippit:

    If you take a close look at the wires coming from the fan you will notice there is three not just two. The third is for counting the RPM's, ASUS comes with a utility that allows you to monitor fan speed as well as voltages and temperatures. This feature probably exists on other cards but this is the first video card I have reviewed that has it.