# Gromacs Version **URL:** \ **Category:** User discussions\ **Tags:** forcefield, simulation-setup\ **Created:** [January 24, 2024, 10:31am UTC](https://gromacs.bioexcel.eu/t/gromacs-version/8124 "2024-01-24T10:31:57Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![maham](https://avatars.discourse-cdn.com/v4/letter/m/c77e96/32.png) [@maham](https://gromacs.bioexcel.eu/u/maham)\ **Post date:** [January 24, 2024, 10:31am UTC](https://gromacs.bioexcel.eu/t/gromacs-version/8124/1 "2024-01-24T10:31:58Z")
GROMACS version: 2021.4-Ubuntu-2021.4-2 GROMACS modification: Yes/No I downloaded the Gromacs 2023.3 from the download and followed the installation guide. when I write gmx --version it says that my gromacs version is " 2021.4-Ubuntu-2021.4-2". I am unable to understand why my version is 2021. secondly, I want to download a parameter file suitable for the "GROMACS 4.5.x up to 5.x.x " version. I am again confused as what versions are these ? ---
**Author:** ![vedran](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/vedran/32/1784_2.png) [@vedran](https://gromacs.bioexcel.eu/u/vedran)\ **Post date:** [January 24, 2024, 11:37am UTC](https://gromacs.bioexcel.eu/t/gromacs-version/8124/2 "2024-01-24T11:37:03Z")
> I downloaded the Gromacs 2023.3 from the download and followed the installation guide. when I write gmx --version it says that my gromacs version is " 2021.4-Ubuntu-2021.4-2". I am unable to understand why my version is 2021. You should [source GMXRC file](https://manual.gromacs.org/current/install-guide/index.html#getting-access-to-gromacs) after installation. > secondly, I want to download a parameter file suitable for the "GROMACS 4.5.x up to 5.x.x " version. I am again confused as what versions are these ? These are very old versions (pre-2016). ---
**Author:** ![flor](https://avatars.discourse-cdn.com/v4/letter/f/a87d85/32.png) [@flor](https://gromacs.bioexcel.eu/u/flor)\ **Post date:** [December 5, 2024, 4:13pm UTC](https://gromacs.bioexcel.eu/t/gromacs-version/8124/3 "2024-12-05T16:13:52Z")
I have the same problem, I downloaded and installed gromacs 2024 and I added gpu for installation but, the version showed me is 2021 and gpu disabled!!! why?? ---
**Author:** ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)\ **Post date:** [December 5, 2024, 4:49pm UTC](https://gromacs.bioexcel.eu/t/gromacs-version/8124/4 "2024-12-05T16:49:30Z")
Did you source the `GMXRC` of the new installation? Did you read the [Installation guide - GROMACS 2024.4 documentation](https://manual.gromacs.org/current/install-guide/index.html) carefully? Especially this section [Installation guide - GROMACS 2024.4 documentation](https://manual.gromacs.org/current/install-guide/index.html#getting-access-to-gromacs-after-installation). ---
**Author:** ![flor](https://avatars.discourse-cdn.com/v4/letter/f/a87d85/32.png) [@flor](https://gromacs.bioexcel.eu/u/flor)\ **Post date:** [December 6, 2024, 12:09pm UTC](https://gromacs.bioexcel.eu/t/gromacs-version/8124/5 "2024-12-06T12:09:05Z")
Yes, I did. finally I uninstalled all things about gromacs, again I downloaded the last version and installed without problem. Just I turned off MPI option. I don’t know if I can turn it on without uninstalling gromacs. ---
**Author:** ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)\ **Post date:** [December 6, 2024, 12:20pm UTC](https://gromacs.bioexcel.eu/t/gromacs-version/8124/6 "2024-12-06T12:20:43Z")
In the same location where you built GROMACS, you can just turn on the MPI option (with `cmake`) and recompile and reinstall. You can have both versions in parallel, one will be called `gmx`, the other `gmx_mpi`.