Legit Reviews posted a review on the Sapphire Radeon HD 5870 Vapor-X Video Card
A quote from the article:
>> Sapphire Radeon HD 5870 Vapor-X Video Card Review
Sapphire has added their Vapor-X vapor chamber cooling technology to the Radeon HD 5870 series and has launched a doozy of a card today. Read on to see how this factory overclocked Radeon HD 5870 does with a superior cooling solution in place to keep the RV870 core nice and cool. You might just be surprised to see how well this card does!
>> Sapphire Radeon HD 5870 Vapor-X Video Card Review