Review: Sapphire X1650 Pro Ultimate Edition
"I don't know who Sapphire worked with to develop their heatpipe design, but I am impressed with the construction. The tubes are 8mm which will allow a lot of movement of fluid and vapor which means more efficient cooling. The bends on the tubing are a little rough, but not enough to affect it's ability. If you look closely at the picture of the side of the card that has the DVI connectors you will notice two rubber pads on the fins. These keep the metal from meeting with circuitry, which is a very good thing.