DriverHeaven.net posted a review on the Sapphire Radeon HD 4890 Vapor-X

Today we're going to be testing the Sapphire HD 4890 Vapor-X. This specific model of the 4890 slots in just above the basic card and below the Toxic edition which is clocked at slightly higher speeds. There is also an Atomic version of the card with a 1GHz core which we will be looking at shortly. Don't be mistaken though, the Vapor-X model still has fantastic potential and is supplied with a custom cooling solution, increased clock speeds and an impressive output configuration all tied together with an attractive price tag.

Sapphire Radeon HD 4890 Vapor-X Review