Bigbruin.com has published a review on the Sapphire Radeon HD5670 1GB Graphics Card

Sapphire's Radeon HD5670 offers a budget friendly introduction to some of the new features first made available on the higher end HD5000 series of cards. While it doesn't do anything to really "wow" you, it does provide a compact, low noise solution that would let you experience things like DirectX 11 and Eyefinity in a more modestly priced desktop or HTPC system.

Sapphire Radeon HD5670 1GB Graphics Card Review