Techgage.com posted a review of Sapphire's 2GB Radeon HD 5870 Vapor-X graphics card
Sapphire Radeon HD 5870 Vapor-X 2GB: Introduction - Techgage
As our games continue to become even more robust, it would seem likely that having more memory available to the GPU would prove useful, but are we soon to see 2GB cards become commonplace? After many completed tests with Sapphire's Radeon HD 5870 Vapor-X 2GB, we're having a hard time settling on that.
Sapphire Radeon HD 5870 Vapor-X 2GB: Introduction - Techgage