Will the server start?

Question

*nix-like systems

While I wrote this post, ̶p̶r̶ ̶ С̶ ̶ ̶ ̶ ̶ ̶ ̶ ̶ ̶ ̶ ̶ ̶ ̶ ̶ ̶ ̶ ̶m̶ ̶ ̶ ̶d̶d̶d̶ ̶ С̶ С̶ ̶ ̶, but no, I have been about 5 years old) there is a
stomach of the Grizzly Rev 0b (S-775, Chipes, it is q35> Intel® Core™2 Duo E8500 Memory hynix 1gb 1rx8 pc2-6400u-666-12 2 sticks of 1 GB. I want to buy on ali strips from kingston ddr 2 800MHZ and expand to 8 gb. but it is not clear whether it will work, In the specification

NOTE. * Above 3 GB, all memory may not be available due to system resource requirements.

Standard hdd seageate barrcacuda for 250 gb
I want to install a server * nix OC on this hardware, until the truth is decided, the choice is between Debian and ubuntu server.
The server is assembled primarily for testing and debugging, approximately calculating the load on Vps or a dedicated server.
The back-end of the application, built in python, must be on the server.
Now a question.
1) Will I be able to get, for example, Ubuntu Server 18.04.2 LTS on my server
2) If I can, do I understand correctly that there will be no plugs using the latest versions of languages ​​and libraries. That is, my old hardware will not affect the software part in any way.

Answer 1

NOTE. * Above 3 GB, all memory may not be available due to system resource requirements.

Apparently, the limitations of 32-bit OS are implied. With 64-bit, all memory should be available.
It will not be reflected, install any 64-bit OS safely.

Answer 2

On Ali, you can still buy Intel Xeon E5440
https://www.aliexpress.com/item/LGA775-slot-Xeon-E...
I took 2 pieces with DDR 2 memory
It came quickly, everything is working.