CPU3D published a review of the Sapphire Radeon HD3870 Toxic with 512MB memory.

Quote from the review: "Featuring Vapor-X Cooling system, the Sapphire Radeon HD3870 Toxic is one unique card. The Vapor Chamber Technology combines compact heatsink design and high cooling efficiency, allowing the card to fit in a single PCIe slot. Our CPU3D review team put it through the test with some DX10 games.
Vapor-X cooling system is one of the main highlights of this card, and makes it very unique and different from other Radeon HD3870s. What's more its slim-line size and quiet operation makes it ideal for gamers and enthusiasts alike."
Read the full review on CPU3D.