Hey, I just spent about 4 hours trying to figure this problem out myself. And I'm talking about re-installing chipset drivers, searching every known corner of the OS's configuration and everything else I could think of. I'm running Windows 8 64-bit (came pre-installed), and I had noticed that the laptop (I have the same model as the OP) would always throttle down to sub 900mHz after boot. This of course is pretty frustrating considering these A10 4600M's are supposed to turbo up to 3.2Ghz. For me, the problem just so happended to be rooted in some of Samsung's nice little bloatware. If you're experiencing this same problem try the solution below:
1. In File Explorer, navigate to:
2. If you see a launcher called "Settings", double click on it to open.
3. Under the General tab, make sure that the "Silent Mode" setting is set to "Off"
4. Open the "Power Managment" tab, and under "Eco Mode" set the mode to "OFF"
Apparently this nice little utility overrides every other app in windows, including Power Managment, AMD Overdrive, and about any other application. I'm not sure why it was set to "Eco Mode" as a default on my system (it seems to me that people might actually want to use the processing power that they buy) but changing this setting has worked = I'm now seeing the 2.7Ghz+ that this system advertizes. I hope this helps!