NVIDIA_OC Daemon is a Linux service for setting NVIDIA GPU clock offsets, memory clock offsets, and power limits through NVML. It is intended for systems where X.Org Coolbits tools are unavailable or not wanted, including Wayland setups. Settings live in a TOML file at /etc/nvidia_oc/config, with separate controls for each device. On its first run, the daemon creates the file using the GPU settings currently reported by the system. It watches /etc/nvidia_oc for changes and reloads edited configuration after a five-second debounce. Logs go to the terminal and to demon.log in the process working directory. The software is free under the MIT License. It needs Linux, a supported NVIDIA GPU, and a driver exposing NVML as libnvidia-ml.so. Building requires a Rust toolchain; creating configuration or applying settings requires root or equivalent permissions. The repository has no systemd unit. Overclocking and power-limit changes can crash a system, damage hardware, void warranties, or leave a machine unbootable.

Who it is for

It suits Linux users with supported NVIDIA GPUs who need GPU clock or power controls where Coolbits tools are unavailable or undesirable. Users should be comfortable with root-level configuration and the risks of changing GPU settings.

What is good

Controls GPU and memory clock offsets and power limits.
Supports per-device settings.
Reloads edited configuration after a five-second debounce.
Free software under the MIT License.

What to know first

Requires a supported NVIDIA GPU and NVML driver.
Building requires a Rust toolchain.
Configuration and setting changes require root-level permissions.
Repository does not include a systemd unit.

Verdict

NVIDIA_OC Daemon provides configurable NVIDIA GPU clock and power controls for Linux, including systems where X.Org Coolbits tools are not suitable. Its hardware risks, root permissions, and lack of a systemd unit are important constraints to weigh before use.

NVIDIA_OC Daemon plans and pricing

All plans

MIT License Free use, copy, modify, publish, distribute, sublicense, and sell copies subject to license conditions github.com · 30 Sept 2026

Compared on GPU tuning software

Free plan: Yes
Supported platforms: Linux; NVIDIA GPU
Clock offset control: Yes
Power-limit control: Yes

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The record

Purpose

NVIDIA_OC Daemon is a Rust daemon for applying NVIDIA GPU overclocking settings through NVML.

Target systems

It is intended for systems where X.Org Coolbits tools such as GreenWithEnvy or nvidia-settings are unavailable or undesirable, including Wayland setups.

Configuration

The daemon loads TOML configuration from /etc/nvidia_oc/config and applies GPU clock offsets, memory clock offsets, and power limits.

Reloading

It watches /etc/nvidia_oc recursively and reloads modified configuration after a five-second debounce.

First-run setup

On first run, it generates /etc/nvidia_oc/config from the currently reported GPU settings.

Per-device controls

Configuration supports per-device GPU frequency offsets, memory frequency offsets, and power management limits.

Logging

The daemon logs to the terminal and to demon.log in its process working directory.

Requirements

It requires Linux with a supported NVIDIA GPU and an NVIDIA driver exposing NVML as libnvidia-ml.so.

Build and privileges

Building requires a Rust toolchain, and creating the configuration or applying settings requires root or equivalent permissions.

Integration

The project uses NVIDIA Management Library through nvml-wrapper and direct NVML bindings.

Safety warning

The README warns that overclocking and changing GPU power limits can crash systems, damage hardware, void warranties, or make a machine unbootable.

Hardware limits

Some laptop GPUs or driver/device combinations may not support querying or setting power limits, and NVML calls can fail when operations are not exposed.

Deployment limit

The repository does not currently include a systemd unit.

License

The software is distributed under the MIT License, which grants permission to use, copy, modify, publish, distribute, sublicense, and sell copies subject to license conditions.

Price from

Free