I have 6Gb of Ram installed on my PC but Solus Os only detects 3.4 Gb of Ram, which is not the case.

The installation details of Solus Os that I currently have:
SO: Solus 4.1 Fortitude
Type: 64 bits

Which amount of memory does the BIOS show ?

Sawako That's difficult one. I usually try a different distro ,want I don't know how to fix something. I also have two RAM modules and no problem here.

All I can think of is, take both RAM chips out and put them back again?

    lekkerlinux, Sounds silly, but it worked, I don't understand why if the BIOS always showed me the 6GB of Ram installed and just doing that Linux recognized the 6GB of Ram, it's very strange, but still thanks for the help.

      Sawako I'm so glad that I could have helped you, Sawako!

      It might sounds really silly, but I forgot my password to get into Solus and now I'm typing from Zorin 15!(Dual Linux boot)

      I'll take a nap and try to remember the first part of the Solus password.

        Sawako No luck so far, I think I will put on the Fedora hat tonight and see if it doesn't blow off.