Sapphire Radeon 4890 Vapor-X
 

Sapphire is a company known for taking stock ATI products and pimping them up in various ways, often with higher clock speeds, but more importantly, custom coolers to achieve those high speeds. Their innovative Vapor-X heatsink technology is particularly noteworthy, and they've continued this trend with their latest release, the 4890 Vapor-X, which sports a good factory overclock and promises great performance at cooler temperatures. Today we'll pit the Sapphire 4890 Vapor-X directly against the GeForce GTX 275 and see if there's a knockout blow to deliver.

http://www.pureoverclock.com/article756.html