This sounds like a laptop?
If so I doubt you can change the APU.
I suspect this has to do with gaming. If so my advice is look for games that are still fun but don't require a really powerful solution. Modern games like Torchlight 2 probably work fine. Possibly older games like Half Life 2 if you tweak the settings carefully would work well.
There really are a lot of fun games that aren't too demanding. I'm even playing the original "Devine Devinity" (best at 1360x768).
You can even download the Call of Duty 2 (older game) DEMO from Fileplanet to get a rough idea of how games of that age work:
http
/www.fileplanet.com/157205/150000/fileinfo/Call-of-Duty-2-Demo-%5BSingle-Player%5D
There really is a HUGE difference in how demanding games are though. Use FRAPS and with VSYNC OFF aim for about 40FPS.
You can also try using RadeonPro to force on the "Half Dynamic VSYNC" per game to force 30FPS VSYNC. It auto disables VSYNC if you fall below that but otherwise caps at 30FPS using VSYNC to avoid screen tearing. Basically how 30FPS console games work (they use dynamic/adaptive vsync).