This new flagship also marks the first instance of GDDR5 memory being used in mobile graphics and provides more headroom for games and other 3D software that depends on bandwidth for speed. Two of the chips can be paired in CrossFire mode to produce enough power to run most titles at full detail at the speeds of better desktops.

Beyond the top end model, a new mid-range 4600 series is targeted at mainstream systems as well as at larger thin-and-light notebooks and has the same 320 stream units as the previous top-end but at power levels that allow a fit in tight enclosures. It includes both a starter 4650 model as well as a slightly faster 4670 variant, both of which use less bandwidth-heavy GDDR3 memory but can still support up to 1GB to make up the difference.

Two chip lines for smaller or very power-efficient notebooks are also being launched. The 4500 series is split into 4530 and 4570 models and drops down to 80 stream units to conserve energy and lower the price. A single 4300 series model, the 4330, is meant to potentially replace the