Which Linux distribution to install: AMD64 or x86?

IT & Software | Operating Systems
There is an AMD Phenom II X6 2.8GHz processor and 3 gigabytes DDR3.I know that in 2020 it is not enough, but now it is not about that.
What is the Linux distribution kit? After all, the processor is made on the 64-bit architecture, as I understand it, but the RAM is not enough.
The same goes for Windows.Now I have a 32-bit version of Windows. Maybe I do not understand something and it was necessary to put 64?
Thank you in advance.
No attachments
* A 32-bit system can access 232 memory addresses, i.e 4 GB of RAM or physical memory.
* A 64-bit system can access 264 memory addresses, i.e actually 18-Quintillion GB of RAM. In short, any amount of memory greater than 4 GB can be easily handled by it.

A 64-bit register can theoretically reference 18,446,744,073,709,551,616 bytes, or 17,179,869,184 GB (16 exabytes) of memory. This is several million times more than an average workstation would need to access. What’s important is that a 64-bit computer (which means it has a 64-bit processor) can access more than 4 GB of RAM. If a computer has 8 GB of RAM, it better have a 64-bit processor. Otherwise, at least 4 GB of the memory will be inaccessible by the CPU.

A major difference between 32-bit processors and 64-bit processors is the number of calculations per second they can perform, which affects the speed at which they can complete tasks. 64-bit processors can come in dual core, quad core, six core, and eight core versions for home computing. Multiple cores allow for an increased number of calculations per second that can be performed, which can increase the processing power and help make a computer run faster. Software programs that require many calculations to function smoothly can operate faster and more efficiently on the multi-core 64-bit processors, for the most part.

Advantages of 64-bit over 32-bit:
Using 64-bit one can do a lot in multi-tasking, user can easily switch between various applications without any windows hanging problems.
Gamers can easily plays High graphical games like Modern Warfare, GTA V, or use high-end softwares like Photoshop or CAD which takes a lot of memory, since it makes multi-tasking with big softwares easy and efficient for users. However upgrading the video card instead of getting a 64-bit processor would be more beneficial.

A computer with a 64-bit processor can have a 64-bit or 32-bit version of an operating system installed. However, with a 32-bit operating system, the 64-bit processor would not run at its full capability.
On a computer with a 64-bit processor, we can’t run a 16-bit legacy program. Many 32-bit programs will work with a 64-bit processor and operating system, but some older 32-bit programs may not function properly, or at all, due to limited or no compatibility.

on January 22nd, 2020 (8:43 pm)
Clearly 64 bit, for example CentOS 7 or latest 8...
on January 22nd, 2020 (8:44 pm)
All coments
This job has not been commented yet.