I bought a PC with 8 GB RAM. I installed Windows 7 in it, and now its showing that only 3.9 GB of RAM are usable? What about the remaining RAM? Is
![How to check computer specs Windows 8, 7, Vista, XP, Server | P&T IT BROTHER - Computer Repair Laptops, Mac, Cellphone, Tablets (Windows, Mac OS X, iOS, Android) How to check computer specs Windows 8, 7, Vista, XP, Server | P&T IT BROTHER - Computer Repair Laptops, Mac, Cellphone, Tablets (Windows, Mac OS X, iOS, Android)](https://www.pntbrother.com/wp-content/uploads/2015/09/computer_properties.jpg)
How to check computer specs Windows 8, 7, Vista, XP, Server | P&T IT BROTHER - Computer Repair Laptops, Mac, Cellphone, Tablets (Windows, Mac OS X, iOS, Android)
![windows 8 - Task Manager Displaying 8.2/12.4 GB of RAM committed when I only have 8 installed - Super User windows 8 - Task Manager Displaying 8.2/12.4 GB of RAM committed when I only have 8 installed - Super User](https://i.stack.imgur.com/SY3w2.png)