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
![Installed Memory vs RAM Usable by Windows | Installed Memory,RAM Usable, Windows,Diagnose Problems with Installed Memory vs RAM Usable and Reported by Windows Installed Memory vs RAM Usable by Windows | Installed Memory,RAM Usable, Windows,Diagnose Problems with Installed Memory vs RAM Usable and Reported by Windows](https://archive.techplayboy.com/images/articles/Installed-Memory-RAM/Windows-Installed-Memory-RAM-Available.png)
Installed Memory vs RAM Usable by Windows | Installed Memory,RAM Usable, Windows,Diagnose Problems with Installed Memory vs RAM Usable and Reported by Windows
![Systems with the Intel Skylake chipset and 4G or above memory: Memory size shows less than 2 GB available RAM if 32-bit Windows 7 is installed on the system | Dell US Systems with the Intel Skylake chipset and 4G or above memory: Memory size shows less than 2 GB available RAM if 32-bit Windows 7 is installed on the system | Dell US](https://supportkb.dell.com/img/ka02R000000hw5NQAQ/ka02R000000hw5NQAQ_en_US_1.jpeg)