Aspire E is a laptop but what specific model number is it? Like Aspire E1-571-6811. Most likely you have an integrated GPU meaning you can't replace it because it is in the CPU itself. Changing the CPU won't help because you don't have a place in the laptop to place you gpu anyways. You can try upgrades like faster and more RAM or try to overclock your GPU (Warranty may become VOID if the CPU breaks, try at YOUR OWN RISK).Other than that, you can't do much about it. Sorry.
Member RevoMaxx is quickly moving up the ranks of Acer Community. He joined us in September and is already making a difference. It's great to see new members like him make a difference only after a few months. Thanks RevoMaxx!