Hardware Upgrade: Why Windows Can’t See All Your RAM

Hardware Upgrade: Why Windows Can’t See All Your RAM

Installing RAM should be as simple as placing the new RAM into the slots and powering on your computer. However, a number of issues – both hardware and software related – can cause problems when installing new RAM.

Windows should be able to see and use most of the RAM you’ve installed. If Windows can’t see all of the RAM you’ve installed, there’s a problem.

You’re Using 32-bit Windows

32-bit versions of Windows have low memory limits. The maximum amount of RAM supported by a 32-bit version of Windows 8, Windows 7, Windows Vista, and Windows XP is 4 GB. if you have more than 4 GB of memory, you’ll need a 64-bit version of Windows to take advantage of it.

To check which version of Windows you’re using, press the Windows key, type system, and select the System option. (On Windows 8, you’ll need to click Settings before selecting System.)

If you’re using a 32-bit version of Windows, you’ll need to install a 64-bit version to take advantage of all your RAM.

Your Windows Version Has a RAM Limit

The 32-bit vs. 64-bit difference isn’t the only thing that could restrict the amount of RAM you have available. Editions of Windows also have their own limitations. For example, if you’re using Windows 7 Starter, you can only use up to 2 GB of RAM, not 4 GB. Windows 7 Home Basic Users can only use a maximum of 8 GB of RAM, even if they’re using a 64-bit version of Windows.

For the full list of restrictions on each version of Windows, consult the Memory Limits for Windows Releases page on Microsoft’s MSDN site. You’ll find the name of the Windows edition you have installed in the System window mentioned above.

Memory is Allocated to Internal Graphics Card or Other Hardware

Hardware components often use some of your internal system memory (RAM) for themselves. For example, while a discrete graphics card (GPU) comes with its own RAM, onboard graphics (also known as integrated graphics) uses part of your RAM as its video memory.

Your computer may also be allocating part of your RAM to other hardware, such as your network hardware.

To determine how much of your RAM is reserved for hardware and how much is usable by Windows, use the System window mentioned above. The total amount of usable RAM is displayed next to the total amount of memory Windows can see. In the screenshot below, 0.1 GB of RAM is reserved for hardware.

Sources : http://www.howtogeek.com/131632/hardware-upgrade-why-windows-cant-see-all-your-ram/?utm_source=newsletter&utm_medium=email&utm_campaign=261212