Checking RPM speed

how do i check my rpm speed on my x800xt pci express card fan with the ati rev silencer 4.

I can't remember. Does the fan have 3 wires going out of it? I thought the fans on the x800 series only had two pins, which would mean you cannot monitor the rpms. As an alternative, you can use ati tool to set and monitor the fan speed as a percentage of full power.