How to install nvidia drivers for old gpu?

[omano]

Do not install drivers from Nvidia directly. It is not supported and will have files installed in the system not tracked internally by installing the Nvidia way, always use the package manager to install files in the system to avoid issues.

Apparently you card is supported only by the 340 series drivers, which unfortunately is not officially supported by Manjaro anymore (or Nvidia actually).

You may have a solution though if you want to pursue your venture with Manjaro. You could simply use the open source driver, and see if it works like that, and if it does, just use this driver.
If you require to use the Nvidia 340 driver, you could still install it following this guide (use kernel 5.4 or 5.10 only)

[HowTo] get legacy 340xx NVIDIA drivers back

Prepare your system for building drivers you may want to install development tools:sudo pacman -S git base-devel then you may want to install your proper kernel headers:sudo pacman -S $(mhwd-kernel -li | grep '*' | cut -d ' ' -f5 | awk '{print $0,"-headers"}' | sed s'/ //'g) 340xx (dkms for kernel 5.4 or 5.10 only) You need to get the sources first: git clone https://gitlab.manjaro.org/packages/extra/nvidia-340xx-utils.git git clone https://gitlab.manjaro.org/packages/multilib/lib32-nvi…

and you will also probably need to manually add this new workaround too (this is for the 390 series driver but probably would work for the older 340 driver)

@philm

Nvidia 390xx driver series not supported by this update

nvidia-390xx is not compatible to Xorg-Server 21.1.1 yet. This was already reported in April this year and we gave another hint this month. Since Nvidia didn’t respond in time we decided to do a workaround, since not so much got changed in Xorg-Server after all. Therefore we added the file /etc/X11/xorg.conf.d/30-nvidia-ignoreabi.conf with following content:

Section "ServerFlags"
  Option "IgnoreABI" "1"
EndSection

But just test with the open source driver first, if it works I wouldn’t get into more trouble with the Nvidia 340 driver and its lack of support from Nvidia.