NVOC - NVIDIA GPU Overclocking

GPU overclocking/undervolting utility for Blackwell RTX 50-series on Linux.

Born out of my frustration with the lack of an API that is both easy to use in the terminal, and easy to script around.

WARNING: Overclocking may damage hardware.

Requirements

• Linux x86_64
• RTX 50-series GPU (5090, 5080, 5070, 5060)
• nvidia-open 550+ driver
• nvidia-utils package
• Root access

Install

# Install dependencies (Arch Linux)
sudo pacman -S nvidia-open nvidia-utils

# Build and install
cargo build --release
sudo cp target/release/nvoc /usr/local/bin/

Usage

Commands

# Show GPU information
nvoc info

# OC
sudo nvoc -c MIN,MAX -o OFFSET -m MEM_OFFSET -p POWER_LIMIT

# Reset
sudo nvoc reset

# Dry Run
nvoc -c 200,2800 --dry-run

Options

• -c, --clocks <MIN,MAX> - Set GPU locked clocks (MHz)
• -o, --offset <OFFSET> - Graphics clock offset (MHz)
• -m, --memory-offset <OFFSET> - Memory clock offset (MHz)
• -p, --power <PERCENT> - Power limit percentage (50-150%)
• -d, --device <INDEX> - GPU device index (default: 0)
• --dry-run - Preview changes only

Commands

• info
• reset

Limitations

Examples

Overclocking or Undervolting

# 5090 uv example
sudo nvoc -c 200,2820 -o 856 -m 2000 -p 105

# Graphics offset
sudo nvoc -o 200

# Memory offset
sudo nvoc -m 1500

# Power limit
sudo nvoc -p 105

# Locked clocks
sudo nvoc -c 200,2800

Power Management

Power limits are specified as percentages of the GPU's default power limit:

• 100%: default hardware power limit
• 110%: 10% increase over default

Hardware enforces absolute min/max constraints regardless of percentage.

Info Command Output

$ nvoc info
Driver 580.82.09
0: NVIDIA GeForce RTX 5090
Blackwell v16777240
GPU: 1177MHz
GPU Offset: 960MHz
Mem: 15501MHz
Temp: 56°C
Power: 45W
Power Limit: 600W (104% of default)
Power Range: 400W-575W (hard limit: 600W)

Limitations

Voltage Curve Offsets

The NVML API only supports global clock offsets, not per-voltage point adjustments. This means:

• Offsets apply uniformly across all voltage points on the GPU's voltage/frequency curve
• Fine-grained undervolting (setting specific voltage for specific frequency) is not possible
• Tools like MSI Afterburner's curve editor provide more granular control via a non-public API

This is a hardware abstraction layer limitation, not specific to nvoc.

Monitor

watch -n 1 nvoc info