Techgage.com published a review of Sapphire's Radeon HD 5870, Vapor-X edition
A quote from the article:
>> Sapphire Radeon HD 5870 Vapor-X Review
It's no secret that the Radeon HD 5870 is the fastest GPU on the planet, but what do you get when you take it, toss in a more robust cooler, quieter operation, higher clock speeds and not one, but two free games? You get the Vapor-X, from Sapphire. Despite all that it packs in above the reference version, it modestly carries just a $20 premium.
>> Sapphire Radeon HD 5870 Vapor-X Review