Arc Power: A Free Intel Arc Tuner That Refuses to Fake a Successful Apply

By Indie Kings | October 20, 2026

Updated October 20, 2026: Arc Power, a free GPL-2.0 Windows tuning tool for Intel Arc GPUs, released version 1.2.4 as a hotfix on October 20, per its GitHub releases. The app handles clocks, power limits, voltage offsets and fan control, adds monitoring, overlays, recording, profiles and a driver library, and verifies every applied value by reading it back from the driver. Its own support table lists A-series and B580 and B570 cards as verified working, with Arc Pro and integrated Arc limited to tweaks and telemetry.

The one-sentence version: a community tuner is exposing power and voltage headroom Intel's own software does not, and its most interesting feature is that it tells you when an apply failed.

Image credit: Arc Power project.

What Arc Power is

Arc Power is a Windows application for Intel Arc graphics cards, written in JavaScript and packaged as an installer or a portable executable. The README lists its dependencies as IGCL, RTSS, LibreHardwareMonitor and OBS, which maps to four jobs: talking to Intel's graphics control library, drawing an overlay, reading sensors, and recording video.

The tuning page covers clocks, power limits, voltage offsets and fan controls. The monitoring page shows GPU, CPU, memory, frame rate and frame time data. Overlays can run through Arc Power itself or through RTSS, with optional CPU and GPU chip labels and a shared Celsius or Fahrenheit setting. Recording supports configurable encoders and bitrate control, with a global start and stop hotkey and an Instant Replay buffer.

Around those core features sit the conveniences that make a tuner usable day to day. Named profiles can be saved, loaded, renamed and deleted, and an active profile can be applied at Windows logon. The Driver Library browses Intel Arc and Arc Pro driver releases, shows release information, and downloads or removes installers. A Tweaks page exposes reversible Windows settings, and a Display page handles scaling and color options.

The repository was created on August 4, 2026, and has 45 stars, 3 forks and no open issues as of October 20. It is GPL-2.0 licensed and states that it is not affiliated with or endorsed by Intel. The version numbering is already at 1.2.4, which tells you the project ships fixes quickly rather than saving them for a quarterly release.

The read-back design

Most tuning utilities ask the driver to set a value and then show you a success message if the call returns success. Arc Power's documentation describes a stricter process, and it is the reason the project is worth more than a passing look.

Every apply is confirmed by reading the value back from the driver, including a delayed re-read intended to catch a setting that reports success and then reverts. A setter that returns success but leaves the read-back unchanged is reported as a failure, not as applied. The docs call this honest refusal, and they describe per-control error messages rather than a silent failure or a fake success state.

Ranges are clamped to what the device reports, in both the interface and the backend, and the app says it never overrides driver-level ceilings. Capability detection happens at launch, so limits, ranges, steps and units come from the GPU rather than from a hardcoded table. Expert controls such as VRAM frequency and voltage offsets, GPU voltage lock and custom VF curves only appear on hardware that reports support.

The VF curve path has its own verification rules. Points follow the voltage and frequency steps the driver reports, the complete live curve is read back after each write, and an exact match succeeds. A difference of at most one reported driver step per point is shown as a driver adjustment, while larger remaps, unstable read-back or a write that leaves the curve unchanged are reported as failed applies with the requested draft preserved.

That is a better user experience than most overclocking tools offer, and it is also a more honest one. A failed apply that looks successful sends users chasing instability in the wrong place. An app that tells you the driver refused the value saves hours, even if the message is less satisfying than a green checkmark.

375 W on an A770 and 200 mV of undervolt

The extended range section is where the tool gets ambitious. On Alchemist cards in the A770 class, Arc Power offers power limits up to 375 W and temperature limits up to 115 degrees Celsius in an Advanced OC mode. The standard limits are 252 W and 90 degrees, and anything above them requires an elevation prompt and an explicit confirmation.

The implementation is split by range. Up to 315 W, the app uses a bundled 2023-era IGCL runtime, which the README says is Intel's own code under BSD-3-Clause and is attributed in the third-party notices, and which the kernel driver still accepts. Above 315 W, it writes the sustained and burst limits through the Level Zero sysman power pair in a single call. The documented ceiling is 375 W on an A770, derived from the card's two 8-pin connectors at 300 W plus 75 W from the slot, and requests above that are refused rather than clamped.

The undervolt path is narrower and more interesting for everyday use. Alchemist cards support a driver-backed negative voltage offset, which Arc Power bounds to minus 200 mV and verifies by reading back from the driver after every apply. Lower voltage at the same clock can cut power and temperature, which matters more on a blower card in a small case than another 50 W of headroom ever will.

The 375 W number will get the headlines, and the 200 mV bound is the feature most owners should care about. Intel's own software has improved, but a tool that exposes a verified undervolt range on older Alchemist hardware is filling a gap that still exists.

Source: Arc Power README support table, fetched October 20, 2026.

Which cards are actually supported

The support table is more conservative than the feature list, which is a good sign. A-series and B580 and B570 cards are verified working with tuning. Arc Pro A and B series and integrated Arc graphics are verified for tweaks and telemetry only, which means the app runs and reports data but does not offer the tuning controls. AMD and NVIDIA cards appear for telemetry when their vendor libraries are available, and no tuning is offered.

That distinction matters because Arc Pro cards are the ones most likely to be in a workstation where power and fan behavior are managed by a system integrator. A tool that refuses to tune them is less exciting and more responsible. The same goes for integrated graphics, where power limits are shared with the CPU package and a naive slider can cause problems the user cannot diagnose.

Tuning controls also depend on what the installed driver reports. The README says a control that appears unavailable means the selected GPU or driver does not report that capability, not that the app is broken. That is the correct behavior for a tool that reads capabilities at launch, and it means the feature list will differ from machine to machine even within the same GPU family.

What is broken or unfinished

The release notes are refreshingly specific about what does not work. The 1.2.4 hotfix fixes RTSS detection for the overlay and Arc Sleep, a cursor that kept refreshing, and adds visual confirmation toasts for Arc Image Sharpening. The previous release, 1.2.3, added the blue gradient branding, fan speed hover details, maintenance options and a long list of reliability fixes.

The largest open problem is Battlemage VF curves. The release notes state that the VF curve has issues in both Intel Graphics Software and Arc Power, verified on the 9150 WHQL driver, and that the project is waiting on a fix from Intel. That is an Intel driver problem rather than an Arc Power bug, and the app says so instead of pretending the feature works.

Two features are explicitly unfinished. Arc Image Sharpening is still in alpha, with rough frame times expected, and the release notes warn about a detection issue in the advanced overlay. Super Resolution is described as a placeholder that detects higher resolutions and lets you try to apply them, which is not the same as a working upscaler. The Sysman tweaks for advanced wattage and negative voltages may only work on Windows 11 with the newest drivers, and are verified on the A770, A750 and A580.

The bundled 2023-era IGCL runtime is another thing to understand. It is included because the kernel driver still accepts that path for limits up to 315 W, and it is Intel's own BSD-3-Clause code. Depending on an older vendor runtime is a reasonable engineering choice for compatibility, and it is also a dependency that could break with a future driver.

Risk, size and the Windows requirement

Overclocking can damage hardware and may void warranties, and the app says so before the first apply. The warranty notice must be accepted, extended ranges need a second confirmation and administrator approval, and the project recommends watching temperatures, power and stability. None of that makes the risks disappear. It just makes them visible.

The download is not small. Both the installer and the portable executable are about 117 MB, which is what a Node.js application with bundled tools looks like. The installer is recommended for apply-at-startup behavior because it can run elevated without a prompt every time, while the portable build may request administrator approval for hardware changes. Windows 10 or 11 on 64-bit is required, along with an installed Intel graphics driver. There is no Linux build.

Read-back verification reduces one class of risk, the false success, and does nothing about the physical risk of too much voltage or too little cooling. The tool's own evidence is the read-back, not a stability test. Anyone pushing an A770 to 375 W should treat the app's success message as the start of validation, not the end of it.

Source: Arc Power GitHub releases, fetched October 20, 2026.

FAQ

Is Arc Power free?
Yes. It is open source under GPL-2.0 and published on GitHub, with an installer and a portable executable. The project accepts no payment for the app and is not affiliated with Intel.

Which GPUs can it actually tune?
Arc A3, A5 and A7 series and Arc B580 and B570 are listed as verified working with tuning. Arc Pro A and B series and integrated Arc graphics are limited to tweaks and telemetry, and AMD and NVIDIA cards appear for telemetry only.

Can it raise an A770 above 252 W?
Yes. Advanced OC mode offers up to 375 W and 115 degrees Celsius on A770-class Alchemist cards, with an elevation prompt and explicit confirmation. The documented ceiling comes from two 8-pin connectors plus the PCIe slot, and requests above it are refused.

Does it undervolt?
Alchemist cards support a driver-backed negative voltage offset bounded to minus 200 mV, verified by reading the value back after each apply. Undervolting is the more useful feature for most owners, because it can reduce power and temperature at the same clock.

Why does an apply fail?
Arc Power reads values back from the driver after every write, including a delayed re-read. If the driver returns success but the value does not change, the app reports a failed apply rather than a fake success, and keeps the requested draft.

Does it work on Linux?
No. Arc Power requires Windows 10 or 11 on 64-bit and an installed Intel graphics driver. There is no Linux build in the repository.

Our take

The feature I would keep is the failure message. Overclocking tools have spent decades lying to users about successful applies, and a tool that reads the value back, waits, reads it again and tells you the driver refused is doing the job properly. That design choice is worth more than the 375 W mode, because it changes how people debug every other setting in the app.

The 375 W ceiling is also well argued. Deriving it from the connector and slot budget, refusing requests above it, and documenting which mechanism applies below and above 315 W is the kind of detail that separates a tuner from a slider with a warning label. I would still not run an A770 at 375 W without checking the card's cooling and the case's airflow, and the app would be the first to tell you the apply succeeded, not that the card is stable.

The unfinished parts are honest and that is the right trade. Battlemage VF curves are broken in Intel's own software, Image Sharpening is alpha, and Super Resolution is a placeholder. A project that lists those limitations in its release notes is easier to trust than one that markets them as features.

The Windows requirement is the real limit on who gets to use any of this. Arc owners on Linux have driver-level tools and a different stack, and the 117 MB Node.js package is heavier than a native utility. Those are acceptable costs for a free tool that does the job, and they are worth saying out loud before someone downloads it expecting a 5 MB executable.

Bottom Line

Arc Power is a free, GPL-2.0 Windows tuning and monitoring application for Intel Arc GPUs, now at version 1.2.4 after a hotfix on October 20, 2026. It tunes clocks, power limits, voltage offsets and fans, monitors GPU and frame data, draws overlays, records video, saves profiles, manages drivers and applies reversible Windows tweaks. A-series and B580 and B570 cards are verified for tuning, while Arc Pro and integrated Arc are limited to tweaks and telemetry. On A770-class Alchemist cards it offers up to 375 W and 115 degrees Celsius in Advanced OC mode, with an explicit confirmation, and it bounds undervolting to minus 200 mV with driver read-back after every apply. Its best feature is that it reports failed applies instead of faking success, and its honest limitations include broken Battlemage VF curves pending an Intel fix, alpha image sharpening and a placeholder super resolution mode.

Sources: YamsSE/Arc-Power README, feature and safety documentation, and GitHub release notes for 1.2.3 and 1.2.4, fetched October 20, 2026.

Related: How Overclocking Really Works on Intel CPUs | Intel Arc B580: The Budget GPU Killer of 2026? Vs RTX 5060 & RX 7600 XT Showdown