Windows experience index ranks your system’s individual hardware and components against a set benchmark and provides a rating of your system from 1 to 9.9, with 9.9 being the best possible rating. The score I have is 3.2 but have been up to 4.1. If you want to see this score, here is how you can do it in Windows 8:
1. Open Control Panel
2. Click Performance Information and Tools
3. This screen shows your subscore based upon benchmarks.