More and more systems are already on 64-bit version of their operating systems. Users opt to install 64-bit than the otherwise known, less capable 32-bit version. However, most people doesn't really know what the difference is. We're going to take a look at the most important difference so you would know what are the benefits (and drawbacks) if you upgrade to the 64-bit version of your OS.
To start of, you have to figure out what version of Windows you are currently running. Just head into the system properties in the Control Panel, or an easy way is to right click on your computer icon (on the start menu/desktop) then choose properties from the menu.
In order to run a 64-bit system, your processor should support 64-bit in order to run it. If you've bought your PC in 2010-2013 you'd be fine. Otherwise, you'd have to check your Processor on your manufacturer's website for the support.
The 32-bit
To simply put it, 32-bit systems are limited to 4GB's of RAM. 32-bit have a hard limit for the amount of memory it can address. Not only is this the problem for 32-bit systems but also, your devices (i.e video card and motherboard BIOS) take up room in that same 4GB space which mean your Operating System gets access to even less of your RAM.
and the 64-bit?
This systems can get theoritically up to 192GB of system memory (on Professional and Ultimate versions of Windows). Also, if the 2GB limit imposed on the 32-bit system is such a major letdown, the 64-bit has access to 8TB of virtual memory for the per-process limit. 64-bit of any Windows Operating System also come with a technology to prevent hijacking the kernel, support for hardware-enabled data execution protection, and mandatory digitally signed 64-bit device drivers.
Do remember that 32-bit applications work on 64-bit but not the other way around. This is because of the compatibility layer which is added on the 64-bit iteration which switches the processor back and forth between 32 and 64-bit modes depending on which thread needs to execute - making 32-bit software run smoothly even in the 64-bit environment. In conclusion, almost all of your current applications should either continue to work in 64-bit or has a 64-bit version of the application. Check your software manufacturer to make sure.
Should I use the 32-bit or 64-bit?
If you bought a PC just recently, chances are you're running a 64-bit operating system (which is better), also do note that with more than 4GB's of RAM, 64 bit is much more applicable. If you have something with less than that, you're better off with the 32-bit system.
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