GPU-Z is not available for Linux but there are some alternatives that runs on Linux with similar functionality. The best Linux alternative is CPU-X (by X0rg), which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to GPU-Z and eight of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to GPU-Z are hwinfo, Hardinfo, cpufetch and Examine for COSMIC.
CPU-X is a free software that gathers information on CPU, motherboard and more.
Almost everyone thinks CPU-X (by X0rg) is a great GPU-Z alternative.
CPU-X (by X0rg) is the most popular Linux alternative to GPU-Z.
hwinfo/libhd are used to probe for the hardware present in the system. It can be used to generate a system overview log which can be later used for support.
Hardinfo is a system information and benchmark tool for Linux. It shows detailed system info, including hardware, environment, and kernel. It can use lm_sensors and ACPI for temperature and battery information. It also has four CPU banchmarks and two FPU benchmarks.
cpufetch is a command-line tool written in C that displays the CPU information in a clean and beautiful way.
cpufetch is the most popular Mac alternative to GPU-Z.
Examine is an app which gives you easy access to system information without needing to use the terminal, built for the COSMIC desktop.
Client application for the OpenGL hardware capability database. This tool detects, displays and uploads OpenGL hardware reports to the OpenGL hardware database at http://opengl.gpuinfo.org.
sysinfo is a graphical tool that is able to display some hardware and software information about the computer it is run on.
cinnamon-cpufreq-applet - Port of Gnome 3 CPUFreq applet to Cinnamon - with some fixes.
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Most are CPU related, not GPU related.