I have Debian 64 bits Wheezy XFCE and a MSI GT720 2Gb of memory, when I launch hardinfo it said I have only 128Mb so how can be sure ?Is there a specific command ?lspci | grep VGA gives:01:00.0 VGA compatible controller: NVIDIA Corporation Device 1288 (rev a1)But, my card is GT720 MSI, not really 1288 ?The command find /dev -group video gives nothing.The command glxinfo | grep -i vendor gives:server glx vendor string: NVIDIA Corporationclient glx vendor string: NVIDIA CorporationOpenGL vendor string: NVIDIA CorporationThe command apt-cache search nvidia | grep driver gives:bumblebee-nvidia - NVIDIA Optimus support using the proprietary NVIDIA driver  nvidia-settings-legacy-173xx - tool for configuring the NVIDIA graphics   driver (173xx legacy version)  nvidia-settings-legacy-96xx - tool for configuring the NVIDIA graphics   driver (96xx legacy version)  nvidia-installer-cleanup - cleanup after driver installation with the nvidia-installer  nvidia-support - NVIDIA binary graphics driver support files  nvidia-xconfig - X configuration tool for non-free NVIDIA drivers  nvidia-glx - transition to nvidia-driver  nvidia-opencl-common - NVIDIA OpenCL driver  nvidia-glx-legacy-173xx - transition to nvidia-legacy-173xx-driver  nvidia-legacy-173xx-driver - NVIDIA metapackage (173xx legacy version)  xserver-xorg-video-nvidia-legacy-173xx - NVIDIA binary Xorg driver (173xx legacy version)  nvidia-glx-legacy-96xx - transition to nvidia-legacy-96xx-driver  nvidia-legacy-96xx-driver - NVIDIA metapackage (96xx legacy version)  xserver-xorg-video-nvidia-legacy-96xx - NVIDIA binary Xorg driver (96xx legacy version)  nvidia-settings - tool for configuring the NVIDIA graphics driver  nvidia-settings-legacy-304xx - tool for configuring the NVIDIA graphics driver (304xx legacy version)  vdpau-va-driver - VDPAU-based backend for VA API  xserver-xorg-video-nouveau-dbg - X.Org X server -- Nouveau display driver (debug symbols)  nvidia-driver - NVIDIA metapackage  nvidia-driver-bin - NVIDIA driver support binaries  nvidia-opencl-icd - NVIDIA OpenCL installable client driver (ICD)  nvidia-vdpau-driver - Video Decode and Presentation API for Unix - NVIDIA driver  xserver-xorg-video-nvidia - NVIDIA binary Xorg driver  nvidia-legacy-304xx-driver - NVIDIA metapackage (304xx legacy version)  xserver-xorg-video-nvidia-legacy-304xx - NVIDIA binary Xorg driver (304xx legacy version)  The command lspci | grep -e VGA -e 3D gives:01:00.0 VGA compatible controller: NVIDIA Corporation Device 1288 (rev a1)The command glxinfo | grep OpenGL | grep renderer give:  OpenGL renderer string: GeForce GT 720/PCIe/SSE2The software Config Xserver Nvidia gives:  
How to verify if my graphics card is well installed on Linux?
linux;graphics