GTX 680 supports GLSL 3.30 in linux?
Installed Debian 8.6 “jessie”
$ uname -a
Linux pc 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/Linux
$ lspci -nn | grep VGA
05:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK104 [GeForce GTX 680] [10de:1180] (rev a1)
$ glxinfo |grep NVIDIA
server glx vendor string: NVIDIA Corporation
client glx vendor string: NVIDIA Corporation
OpenGL vendor string: NVIDIA Corporation
OpenGL core profile version string: 4.4.0 NVIDIA 367.44
OpenGL core profile shading language version string: 4.40 NVIDIA via Cg compiler
OpenGL version string: 4.5.0 NVIDIA 367.44
OpenGL shading language version string: 4.50 NVIDIA
OpenGL ES profile version string: OpenGL ES 3.2 NVIDIA 367.44
$ glxinfo | grep -e "shading language"
OpenGL core profile shading language version string: 4.40 NVIDIA via Cg compiler
OpenGL shading language version string: 4.50 NVIDIA
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20