Green Curve

Overview

Green Curve is a free utility for tuning NVIDIA GeForce graphics cards on Windows and Linux. It suits users who want direct control over GPU curves, clocks, power, or cooling, especially those comfortable managing the risks of overclocking. Its range of controls and automation is compelling, but validation is limited to x64 systems and tuning can destabilize or damage hardware.

The project supports GeForce GPUs from Pascal through Blackwell, with a best-effort fallback for future architectures. It is MIT-licensed and independent of NVIDIA, loading NVAPI and NVML from the installed driver rather than bundling proprietary driver binaries.

Green Curve separates the interface from hardware control: an unprivileged GUI or terminal client communicates with an elevated background service over a local named pipe on Windows or a restricted Unix domain socket on Linux. The project says it has no telemetry, analytics, cloud tracking, or remote error reporting. Its optional release check sends no hardware details, profiles, or settings.

Key features

Curve, clock, and power controls

The utility can inspect and edit live voltage/frequency curves, set core and effective VRAM offsets, and change power targets. A read-only self-test reports driver and curve readback, memory topology, and available control domains. That gives users a way to see what their system exposes before tuning, though it cannot make risky adjustments safe.

Fan control and profiles

Users can leave fan behavior to the driver, set a fixed percentage, or build a temperature curve with up to eight points, configurable hysteresis, and polling intervals. Five saved profile slots per user, global hotkey switching, and automatic switching based on the foreground application help separate settings by task. Five slots may be restrictive for users who keep many presets.

Interfaces and automation

Windows gets a native Win32 GUI; Linux gets a terminal interface navigable by keyboard and mouse. Built-in CLI commands support hardware probing, profile switching, and live-state output in text or JSON, making the tool useful beyond manual adjustment. The different interfaces may be a drawback for users who expect a graphical Linux application.

The optional updater verifies signed release manifests and installs updates only with user consent. The maker offers Windows installers and portable archives, Linux archives and Arch Linux packages, along with SHA-256 files and build-provenance attestations for program packages.

Pricing

Green Curve is free, with no paid plan described. The free utility includes its tuning controls, profiles, interfaces, and CLI; there is no paid tier to unlock additional capacity. Building it requires Python 3.10 or later, a consideration for users compiling from source.

Platforms

Green Curve supports Windows and Linux, with Windows x64 and Linux x64 validated on real NVIDIA hardware. Windows arm64 and Linux arm64 are compile targets, but do not have completed live-hardware validation, so users on those systems should not assume equivalent support. GPU coverage spans Pascal, Turing, Ampere, Lovelace, and Blackwell GeForce cards; support for later architectures is best-effort.

Who it's for

Green Curve is best for GeForce owners who want to adjust voltage/frequency curves, offsets, power limits, or fan behavior and value profile switching or scripting. Its self-test can help establish which controls the driver exposes. It is a poor fit for anyone seeking risk-free performance changes: the project warns that tuning may cause instability, shorten hardware lifespan, or damage hardware.

Pros and cons

• Broad control set: Curve editing, clock and memory offsets, power targets, and three fan modes cover several common tuning needs in one utility.
• Useful profile and CLI options: Hotkeys, foreground-app switching, and JSON-capable commands support both routine switching and automation.
• Clear local-control design: The GUI and TUI run unprivileged while a separate service handles hardware access; the project also states that it does not track users remotely.
• Hardware risk remains real: Adjusting clocks, voltage, power, or fan speeds can cause instability or hardware damage, so this is not a set-and-forget choice for cautious users.
• Validation is x64-focused: ARM builds lack completed live-hardware validation, and future GPU support is best-effort.
• Profile count is finite: Five saved slots per user may not suit users who need a larger library of presets.

Alternatives

Browse GPU Overclocking Software or GPU Tuning Software for other options. For a Windows alternative, Arc Power is free. ASUS GPU Tweak III is another free Windows option, while CoreCtrl is a free, open-source GNU/Linux application. Intel VTune Profiler is a free standalone tool or part of the Intel oneAPI Toolkit, with commercial and non-commercial use permitted and community support available. Linux users can also consider free PenguinBurner or TuxClocker; the latter is GPL-3 and has hardware-specific GPU/CPU support. For newer AMD graphics cards on Windows, MoreClockTool is intended for experienced users and carries an overclocking risk warning. Gainward ExperTool is another free Windows alternative.

Verdict

Choose Green Curve if you use a supported GeForce GPU on validated x64 Windows or Linux and want a free combination of curve, power, fan, profile, and CLI controls. Its strongest case is the breadth of local tuning and automation without a paid tier. Look elsewhere if you need validated ARM support, or avoid GPU tuning utilities altogether if the possibility of instability or hardware damage is unacceptable.