Futurelooks posted a review on the GIGABYTE GV-R489-1GH-B Radeon HD 4890 Video Card

In the war without end between the video card manufacturers, the leader of the pack is determined as much by how many levels of the market they can hit as it is by the manufacturer who can produce the fastest top end card. ATI has always been good at this, many times managing to have multiple versions of a particular core available at every performance level and price point. However in this latest generation, they didn’t have a card to sit between their top end HD 4870 and the dual-GPU equipped HD 4870X2. What’s worse is that NVIDIA did.

GIGABYTE GV-R489-1GH-B Radeon HD 4890 Video Card Review