Radeon HD 6650M is a fast-middle-class GPU based on the 40nm Terrascale 2 architecture.
It's based on the Turks Core (therefore related to Radeon HD 6670) and offers 480 Shader Processing Units, 24 TMUs and 8 ROPs on a 128-bit memory interface of standard DDR3. Its central clock runs at 600MHz and the memory clock operates at 800MHz.
Compared to Radeon HD 6730M, it's heavily underclocked and therefore performs significantly worse.
Using a 720p resolution, most of today's games are only playable at medium settings but with very fluent frame rates (40+).