What is the RAM Limit in Windows 10, 8.1 in 2018?

Radu Tyrsina By: Radu Tyrsina
3 minute read

Home » Windows » What is the RAM Limit in Windows 10, 8.1 in 2018?

If you were wondering what the RAM limit is in Windows 10, Windows 8.1, read below to find the simple answer to this question.
windows 8.1 ram limitSince Microsoft has announced the Windows 10, 8.1 update for Windows 8, many have started to wonder what was the RAM limit in Windows 10, Windows 8.1, since that might have been changed by the Redmond company, since the new update changes quite a lot of things. The average Joe users will be pleased with only a few RAMs, but filmmakers, engineers, doctors and many others specialized jobs require a lot of processing power.

On the other hand, many expected Windows 10 to support even more RAM power since the OS brings some heavy apps to the table — such as Mixed Reality apps. The RAM limit on Windows 10 has indeed increased, reaching 2TB GB for Windows 10 Pro and Windows 10 Enterprise.

RAM Limit in Windows 10, Windows 8.1

You can see in the above image, the maximum physical memory RAM limits for Windows 10, Windows 8 which are the same for Windows 8.1, as well. They are as follows:

  • RAM limits in Windows 10, Windows 8.1 Enterprise – 4GB on x86, 512GB on x64
  • RAM limits in Windows 10, Windows 8.1 Professional – 4GB on x86, 512GB on x64
  • RAM limits in Windows 10, Windows 8.1 – 4GB on x86, 128GB on x64

The screenshot below lists the RAM limit for Windows 10:

windows 10 RAM limit


You also need to be careful at this official explanation related to how graphics cards and other devices affect memory limits:

Devices have to map their memory below 4 GB for compatibility with non-PAE-aware Windows releases. Therefore, if the system has 4GB of RAM, some of it is either disabled or is remapped above 4GB by the BIOS. If the memory is remapped, X64 Windows can use this memory. X86 client versions of Windows don’t support physical memory above the 4GB mark, so they can’t access these remapped regions.

Any X64 Windows or X86 Server release can.X86 client versions with PAE enabled do have a usable 37-bit (128 GB) physical address space. The limit that these versions impose is the highest permitted physical RAM address, not the size of the IO space. That means PAE-aware drivers can actually use physical space above 4 GB if they want. For example, drivers could map the “lost” memory regions located above 4 GB and expose this memory as a RAM disk.

Unfortunately, although Windows 10 supports more RAM, sometimes computers can’t access all of it. If you’re experiencing the same problem, check out this guide to learn what you can do if Windows 10 won’t read all RAM.

What about you – are you running a monster of a machine on your device? What is your RAM limit in Windows 10, Windows 8 and Windows 8.1?


Editor’s Note: This post was originally published in October 2013 and has been since updated for freshness, and accuracy.


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