I'm a computer engineering major right now and yes if you want to design chips, that's the way to go. Just like jellomancer was saying though, be open minded to changing as computer engineering may not be all you think it is. Also, the job market is terrible right now so don't be too picky when you say you want to work only on graphics chips; more than likely you'll end up working at whatever company wants to give you a job. Hopefully it'll turn around in the next couple years but who knows...