Virtual-Hideout posted a review on the Thermaltake DuOrb VGA Cooler

The foot print of the DuOrb is much smaller and lighter than the stock heat sink which is always a nice result. And, the DuOrb does look better adding a bit more flash to a pricey graphics card with a somewhat boring stock cooler. Unfortunately, the included video memory sinks are plain gray, aluminum. This doesn't do the cooler justice and steals away a bit of its potential. Matching copper sinks would definitely compliment the DuOrb better and keep the look more balanced. The Thermaltake DuOrb VGA Cooler is otherwise a good performer and would make your 8800 series graphics cards stand out. Due to the limited designs of stock VGA coolers, it's nice to have a better option made from copper. If you need better cooling and your current card configuration just can't keep up, give the DuOrb some consideration.

Thermaltake DuOrb VGA Cooler Review