AMD's Sub-$100 Line-up: Radeon HD 6450, 6570 & 6670 Review
 

Rounding out its Radeon HD 6000 series, AMD this month launched three sub-$100 graphics cards; the $55 HD 6450; the $79 HD 6570 and the $99 HD 6670. Despite being low-end options, all three support Eyefinity and are of course, extremely power efficient. Let's see if they also have the gaming performance to boot.

http://techgage.com/article/amds_sub...0_6670_review/