Manually re-enable "Smooth edges of screen fonts" to keep text readable while saving significant GPU memory.
To get the most out of an N550 system, you should not just install any driver, but the one for your specific needs: Graphics issues on elementary OS Freya Atom N550 (GMA3150) intel atom n550 graphics driver better
The most common operating system for N550-based devices. The official Manually re-enable "Smooth edges of screen fonts" to