Noise level of HIS video cards

[DeaconFrost]

I currently have a plain vanilla 4850, and it works fine for my needs, except the stock fan is very loud when under a load. I am planning to move my computer to our new office, which needs to be quiet. The rest of my system is quiet, so this is my only point of concern. MicroCenter has a few HIS cards on sale, plus rebates, so I was thinking of picking up a 5670. Are the dual-slot HIS cards fairly quiet during a gaming session?

 

[Lemur]

The noise level of the 4650 is attached. The 5670 is billed as having lower noise level than the original cooler. So, it "sounds" like this might be a good switch.