5970 Fan speed

[cuz0882]

I have never had a problem in the past, but on my new build I can't get the fan speeds working. I'm using 2x 5970s and a 5870. One of the 5970's I can't get the fan speed to change on. I've tried cg miner and msi afterburner. Its shows the tach meter but the option to change the fan speed is not there. I've uninstalled and reinstalled the drivers a few times. I'm not using ccc just the drivers since I'm over 4 gpus. Anyone have experience with a problem like this?