HotHardware.com evaluate a somewhat unique Radeon-based graphics card, the Sapphire Radeon HD 3870 512MB Toxic. A quote from the article:

Unlike most reference 3870 cards, the Sapphire Radeon HD 3870 512MB Toxic differs from ATI's reference design and features higher GPU and memory speeds, a fancy single-slot cooling solution that leverages Microloops' Vapor-X technology, and it has one of the better retail bundles we have seen in quite a while too. Come on by the site and check it out...

>> Sapphire Radeon HD 3870 512MB Toxic Review