How can the OS version on your computer be checked?
By right clicking the start button on Windows 10 and selecting “SYSTEM” it shows the OS version whether it is 32-bit or 64-bit. In windows 7 & 8 (&10) just click “SYSTEM” on the Control Panel to know the OS Version. In addition to it, it also displays whether you’re using a 64-bit processor, which is required to run 64-bit Windows.
How does it matter, which OS is being used?
The 32-bit version can only address a bit less than 4GB of memory in total, for the entire system, this includes the memory in the video card. For Windows it’s usually about 3.5GB total.
“The 64-bit version of Windows handles large amounts of random-access memory (RAM) more effectively than a 32-bit system.”
this is one reason alone why most people choose one over the other.
Though there are other differences, the ability to address certain amounts of RAM is the main concern for most users.