Green Curve
Green Curve: A focused, free tuner for manual NVIDIA overclocking, undervolting, fan control, and profiles. Ranked #5 of 19 in GPU Overclocking Software by our editors (8.5/10); pricing: Free plan; best for NVIDIA tuning across Windows and Linux.
At a glance
- Editor score8.5 / 10
- PricingFree plan
- Best forNVIDIA tuning across Windows and Linux
- Free planYes
- Paid fromFree
- Custom voltage controlYes
- Facts checked20 Sep 2026
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
Our verdict on Green Curve
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.
Your product? Our editors can test Green Curve in depth and publish a review, labelled as paid · from $149/mo →
Green Curve pricing
Green Curve fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| GPU vendor support | Nvidia |
| Custom voltage control | Yes |
| Fan curve control | Yes |
| Power limit control | Yes |
| Tuning profiles | Yes |
| On-screen overlay | Not verified |
| Operating systems | Windows-linux |
| Deployment | Desktop |
| Platforms | Windows, Linux |
| Support | Docs |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 20 Sep 2026 |
Alternatives to Green Curve
- MSI AfterburnerA full-featured, free Windows tuner for multi-vendor GPU overclocking and monitoring.9.4
- ASUS GPU Tweak IIIA free, feature-rich Windows toolkit for guided GPU tuning, profiles, and monitoring.9.2
- Arc PowerA free Windows utility for deep Intel Arc tuning, monitoring, profiles, and overlays.8.9
See all Green Curve alternatives →
Green Curve vs the competition
- Green Curve vs MSI Afterburner
- Green Curve vs ASUS GPU Tweak III
- Green Curve vs Arc Power
- Green Curve vs PenguinBurner
- Green Curve vs TuxClocker
- Green Curve vs CoreCtrl
Compare Green Curve with any tool side by side →
Also Ranked In
Green Curve is ranked in 2 of our directories.
Used Green Curve? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Green Curve for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Green Curve is listed in our GPU Overclocking Software directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/green-curve/"><img src="https://www.itechguides.com/best/badge/green-curve.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update