- Windows Startup Performance
- File Copy Performance
- Opening Applications
- Multitasking Performance
I also saw a moderate improvement in battery life, but this wasn't nearly as significant as the other performance improvements.
If you're looking for ways to improve your laptop's performance, consider switching to an SSD before you upgrade your RAM. You'll notice a difference, especially if you're running Windows 7. If you're going to purchase an SSD, make sure to get one made by a reputable manufacturer like Intel, Samsung, Kingston, Crucial, Transcend, etc.