Just wanted to post to let everyone know my experience with this product. I've had my Mac Pro since early this year, and while it's been a great machine I've not been happy with the noise level of the ATI X1900 XT card. Recently my card was replaced and the new version was even louder than my old one. Thus I broke down and broke my vow not to modify my Mac Pro. I'm quite happy I did. Installing the product only took about 10 minutes, was very easy. The only trick was using a couple of the old screws with the washers for the part that attaches to the red bracket. I fired up my Mac Pro and where before I could hear the whine of the ATI card constantly (and it really became annoying with upgrade to leopard) - now I can't hear it at all. It's a very noticeable difference. Well worth the money. I had a hard time finding one, but ordered from "general nanosystems". I had never dealt with them before, but the product came promptly and as ordered and I would order from them again. Again just sharing in case anyone else is looking to quiet a noisy mac pro. I sure hope the next video card in the next mac pro is both quieter and does not run as hot.