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Green Curve review

Free#5 of 19 in GPU Overclocking SoftwareGPU Tuning Software

A focused, free tuner for manual NVIDIA overclocking, undervolting, fan control, and profiles.

8.5/10Editor score
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Green Curve is an open-source GPU tuning utility for supported NVIDIA GeForce graphics cards. It is intended for users who want manual control over voltage/frequency curves, GPU and memory clock offsets, power limits, fan behavior, and saved tuning profiles. The project provides a Windows GUI and a native Linux terminal interface, making it a focused option for NVIDIA owners who tune across either operating system rather than a general-purpose tool for multiple GPU vendors.

Its standout feature is live NVIDIA voltage/frequency curve editing, supported by clock-offset controls for both the GPU and VRAM. Green Curve also includes power-limit adjustment and custom fan curves with hysteresis and polling controls, giving users several ways to shape performance and thermal behavior. Saved profiles can be assigned global hotkeys, while automatic switching by foreground application can apply different settings to different workloads. The CLI adds dump, JSON export, and capability-probing functions for users who prefer terminal workflows or scripted inspection.

The platform support is broader than a Windows-only utility: a Windows background service and a Linux systemd daemon support persistent control. That combination fits users who want profile management and background operation on both platforms, while the open-source model makes the software available without a paid tier. Green Curve is a strong fit for technically confident NVIDIA users who specifically need voltage-curve editing, fan control, and application-based profiles. It is less suitable for owners of non-NVIDIA hardware or anyone seeking a hands-off tuning experience. The project is also an unofficial third-party NVIDIA utility, and its README warns that manual GPU, voltage, power, and fan changes can cause instability or hardware damage.

Green Curve pros and cons

  • Where it wins
    • Live voltage/frequency curve editing with GPU and VRAM offsets
    • Power limits, fan curves, hysteresis, and polling controls
    • Profiles, app-based switching, CLI tools, and service support
  • Where it doesn't
    • Supports NVIDIA hardware rather than multiple GPU vendors
    • Manual voltage, power, and fan changes can cause instability or damage
    • Its tuning controls are aimed at users comfortable with manual adjustment

Green Curve fact sheet, pricing and score →

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