What is the bit depth? Bit depth – the ability to simultaneously process a certain number of bits.
All Linux systems come in two versions – 32-bit and 64-bit.
Architectural differences between 32 and 64-bit versions of Linux, of course, is.
The most important features and differences that directly affect the user and encountered:
1. The maximum amount of memory (RAM).
2. The operating system bit count (32 or 64-bit).
3. The bit width of the processor.
The maximum amount of RAM.
32-bit operating system can use "see" no more than 4 GB of RAM. This is the main difference, and the most significant. If your computer's random access memory (RAM) - 2GB, 32 bit operating system works with this volume is normal.
64-bit operating system can work with much larger amounts of memory – up to 192 GB.
If you're on a computer with 4 GB of RAM will be running 32-bit OS, it just will not see such a volume. All she can use is about 3.5 GB out of 4 GB. The rest of the volume she can't provide for running programs. Of course, if you install in a computer with 8 GB of RAM, say, and thus will remain on a 32-bit system, it also does not see more than 3.5 GB of total installed amount and the remaining 4.5 GB will just remain unused.
What features has the 64-bit system?
Visually – no. That is outside it is a normal OS, nothing stands out from the 32-bit version.
Technically there are slight differences.
The first, in fact, that 64-bit OS "sees" large amounts of memory and is able to work with them.
Second – it allows you to run 64-bit applications (32-bit).
The bit width of the processor.
Accordingly, in order to be able to install the 64-bit Linux, your CPU must support 64-bit instructions (otherwise you will not even be able to start installing 64-bit Linux). Called these statements have different options: Intel IA64, AMD – AMD64.
To determine which bit processor (32 or 64-bit) of your computer, run in terminal the following command:
As you can see in the picture after executing the command, the architecture is my computer x86_64, i.e. 64-bit. But the processor supports both 32-bit and 64-bit architecture of the installed systems.
If after executing the command you see the numbers x86, i686 or i386, then your computer's processor is a 32 bit and you can install only 32-bit systems.
To check the architecture of the installed Linux OS on the computer, run in the terminal one of the following commands: