Basically, for the usage of 4GB or more memory a 64-bit operating system is necessary.
The table below provides you with an overview of maximum addressable memory under the current operating systems:
Operating System | Maximum Memory (RAM) |
Mac OS X from 10.10 | 18 Exabyte |
Mac OS X from 10.9 | 128GB |
Mac OS X < 10.9 | 96GB |
Windows 11 Pro | 2TB |
Windows 11 Pro for Workstation | 6TB |
Windows 11 Enterprise | 6TB |
Windows 11 Education | 2TB |
Windows 11 Home | 128GB |
Windows 10 Home 32-Bit | 4GB |
Windows 10 Home 64-Bit | 128GB |
Windows 10 Pro 32-Bit | 4GB |
Windows 10 Pro 64-Bit | 2TB |
Windows 10 Pro for Workstation 32-Bit | 4GB |
Windows 10 Pro for Workstation 64-Bit | 6TB |
Windows 10 Enterprise 32-Bit | 4GB |
Windows 10 Enterprise 64-Bit | 6TB |
Windows 10 Education 32-Bit | 4GB |
Windows 10 Education 64-Bit | 128GB |
Windows 8.1 Pro 32-Bit | 4GB |
Windows 8.1 Enterprise 32-Bit | 4GB |
Windows 8.1 64-Bit | 192GB |
Windows 8.1 Pro 64-Bit | 512GB |
Windows 8.1 Enterprise 64-Bit | 512GB |
Windows RT 8 32-Bit | 4GB |
Windows 8 32-Bit | 4GB |
Windows 8 Pro 32-Bit | 4GB |
Windows 8 Enterprise 32-Bit | 4GB |
Windows 8 64-Bit | 192GB |
Windows 8 Pro 64-Bit | 512GB |
Windows 8 Enterprise 64-Bit | 512GB |
Windows 7 Starter 32-Bit | 2GB |
Windows 7 Home Basic 32-Bit | 4GB |
Windows 7 Home Basic 64-Bit | 8GB |
Windows 7 Home Premium 32-Bit | 4GB |
Windows 7 Home Premium 64-Bit | 16GB |
Windows 7 Professional 32-Bit | 4GB |
Windows 7 Professional 64-Bit | 192GB |
Windows 7 Enterprise 32-Bit | 4GB |
Windows 7 Enterprise 64-Bit | 192GB |
Windows 7 Ultimate 32-Bit | 4GB |
Windows 7 Ultimate 64-Bit | 192GB |
Windows Vista Home Basic 32-Bit | 4GB |
Windows Vista Home Basic 64-Bit | 8GB |
Windows Vista Home Premium 32-Bit | 4GB |
Windows Vista Home Premium 64-Bit | 16GB |
Windows Vista Business 32-Bit | 4GB |
Windows Vista Business 64-Bit | 192GB |
Windows Vista Ultimate 32-Bit | 4GB |
Windows Vista Ultimate 64-Bit | 192GB |
Windows Vista Enterprise 32-Bit | 4GB |
Windows Vista Enterprise 64-Bit | 192GB |
Windows XP Home 32-Bit | 4GB |
Windows XP Professional 32-Bit | 4GB |
Windows XP Professional 64-Bit | 128GB |
Windows Server 2019 Essentials | 64GB |
Windows Server 2019 Standard | 24TB |
Windows Server 2019 Datacenter | 24TB |
Windows Server 2016 Essentials | 64GB |
Windows Server 2016 Standard | 24TB |
Windows Server 2016 Datacenter | 24TB |
Windows Server 2012 Foundation | 32GB |
Windows Server 2012 Essentials | 64GB |
Windows Server 2012 Standard | 4TB |
Windows Server 2012 Datacenter | 4TB |
Windows 2008 R2 Server Web 64-Bit | 32GB |
Windows 2008 R2 Server Foundation 64-Bit | 8GB |
Windows 2008 R2 Server Standard 64-Bit | 32GB |
Windows 2008 R2 Server Enterprise 64-Bit | 2TB |
Windows 2008 R2 Server Datacenter 64-Bit | 2TB |
Windows 2008 R2 Server Itanium 64-Bit | 2TB |
Windows 2008 Server Web 32-Bit | 4GB |
Windows 2008 Server Web 64-Bit | 32GB |
Windows 2008 Server Standard 32-Bit | 4GB |
Windows 2008 Server Standard 64-Bit | 32GB |
Windows 2008 Server Enterprise 32-Bit | 64GB |
Windows 2008 Server Enterprise 64-Bit | 2TB |
Windows 2008 Server Datacenter 32-Bit | 64GB |
Windows 2008 Server Datacenter 64-Bit | 2TB |
Windows 2003 Server Standard Edition 32-Bit | 4GB |
Windows 2003 Server Standard Edition 64-Bit | 32GB |
Windows 2003 Server Enterprise Edition 32-Bit | 64GB |
Windows 2003 Server Enterprise Edition 64-Bit | 1TB |
Windows 2003 Server Datacenter Edition 32-Bit | 128GB |
Windows 2003 Server Datacenter Edition 64-Bit | 1TB |
More Informations:
You have an erorr in your page https://www.compuram.de/blog/en/how-much-ram-can-be-addressed-under-the-current-32-bit-and-64-bit-operating-systems/ html code is apperaning
Dear El Kaber,
thank you for your reference to the html snippet.
Kind regards
Your CompuRAM blog team
Thank you.
Hello,
I own a 64 bit Toshiba Satellite L675 that is running Windows 7 Home Premium. According to this page, the max ram I can use is 16 GB, but on another page on your site, it says the max ram I can use is 8 GB (https://www.compuram.biz/memory/toshiba-dynabook/notebook/satellite/l-series/l675/).
Can you clear this up and let me know what the true max ram I can installl? Thank you.
Dear Gregory,
which other site do you mean?
Here you can find memory upgrades for Toshiba Satellite L675.
Maximum is 8GB RAM.
Best regards
Your CompuRAM Team
Thank you.
Express delivery possible!
I picked up the ram, but my system still only reads 4 GB and only 1 slot. Any suggestions? I swapped the ram just to see if one might be bad, but same results.
Dear Gregory,
please check the troubleshooting or contact our customer service.
Best regards
Your CompuRAM Team
What your windows version
Go to windows home and type computer left click and click properties then you will see every thing you need to know about your computer
oh thanks but i don’t see my gpu why……
( i have rx 460…
18 exabytes? Or 16 exabytes? The reason you said 18 exabytes is because it is based on 18,446,744,073,709,551,616 bytes. 18 exabytes if you use the decimal definition of exabytes. 16 exabytes if you use the binary definition of exabytes.
Ain’t that 16 exibytes? The difference between a an i. is the base10 en base2 calculation.
100% compatible to your system!
This article needs an update. macOS can now support 1.5 TB of RAM at least since the Mac Pro can be configured with that much.
Thank you, we made an update.
1.5TB is the limitation of the hardware – MacOS now can support up to 18 Exabyte RAM.
Kind regards from Munich!
Can you give credible source of this information? 18 EB is beyond anything. Theoretically yes, but practically no. There is no hardware that can test this much of memory.
Hi Dude,
You teh man, I am studying Comptia A+ and this RAM limitation just help my studies. Thank you very much, I book marked you page on my browser.
Regards,
Nanang Taten
time for an update
Do you see the same performance on battery only vs. when plugged in? Many laptops will drop to 33% or less cpu usage when on battery.
Also I would open up your task manager and look at the performance tab to see what your CPU usage, disk usage, disk read/write speeds are. If there’s high disk usage and low read/write speeds I’d have a look at how full your SSD is and what type of interface it uses.
There’s no general way to make applications use more RAM, and in general, they will use what they need to. Some apps _MAY_ have some settings that influence the way RAM is used and how much but you’ll need to check each one individually and this tend to be only be true for I/O demanding applications.
You should include Linux too.
Express delivery possible!
Hello, i have a question. I am running windows 10 enterprise, 64bit on my thinkpad t480. It has 32GB of ram and 500GB SSD. It is very slow when trying to do tasks and it never uses more than 15% of the memory. Is there a way to use more ram for tasks/programs? Thanks
You could probably remove 16GB of RAM as it’s unluikely that your programs need that much RAM anyway.
Speed is really down to the Processor such as the faster i7 CPUs.
There is also a very big difference in speed between an SSD and a M.2 SSD
Try scanning with Malwarebytes Free Edition as I have recently removed 620+ PUPs from one laptop which had slowed it down to a crawl.
I recomend to check the temperature of your CPU, to high temperatures wil cause the cpu to throtle it’s speed.
I would recomend openhardware monitor to do this.
As this is a portable device (laptop) and no desktop there are probably two options:
– If your fan is configured in silent mode temperatures in idle should not be higher than 80°C.
– If your fan is configured in performance cooling mode, temperatures in idle should be lower than 60°C.
When temperatures are above 90-95°C most cpu’s wil start to throtle their speed to prevent overheating. As a result you will notice reduced performance.
Another possibility is wrong temperature readings, wrong temperature readings can result in slow performance and loud enoying fan noice.
Hope this was helpfull.
open run command by pressing windows key+R at the same time then type in msconfig go to boot options from the top tab then look for advanced click on it you will see the number of cores of your processor and amount of ram your computer is using maximize the memory and then restart you will feel the effects you can also check it in my this pc properties