Yes the tutorial is for TF without gpu as I am not using TF at all. Arch is a rolling release so afaik the packages are only the latest. If you want different versions you should use the AUR. You can find tutorials on how to install from AUR at the Arch website so I can’t help you with this more the tutorials there are very detailed. In general you should check the files to see if anything malicious is happening and then install it. Alternatively I think you can install cuda and cudnn as described in nvidia’s website but it’s a manual process.