We just received the following update from AMD regarding the RX 480 and its power draw issues.
We promised an update today (July 5, 2016) following concerns around the Radeonâ„¢ RX 480 drawing excess current from the PCIe bus. Although we are confident that the levels of reported power draws by the Radeon RX 480 do not pose a risk of damage to motherboards or other PC components based on expected usage, we are serious about addressing this topic and allaying outstanding concerns. Towards that end, we assembled a worldwide team this past weekend to investigate and develop a driver update to improve the power draw. Weâ€™re pleased to report that this driverâ€”Radeon Software 16.7.1â€”is now undergoing final testing and will be released to the public in the next 48 hours.
In this driver weâ€™ve implemented a change to address power distribution on the Radeon RX 480 â€“ this change will lower current drawn from the PCIe bus.
Separately, weâ€™ve also included an option to reduce total power with minimal performance impact. Users will find this as the â€œcompatibilityâ€ UI toggle in the Global Settings menu of Radeon Settings. This toggle is â€œoffâ€ by default.
Finally, weâ€™ve implemented a collection of performance improvements for the Polaris architecture that yield performance uplifts in popular game titles of up to 3%1. These optimizations are designed to improve the performance of the Radeon RX 480, and should substantially offset the performance impact for users who choose to activate the â€œcompatibilityâ€ toggle.
AMD is committed to delivering high quality and high performance products, and weâ€™ll continue to provide users with more control over their productâ€™s performance and efficiency. We appreciate all the feedback so far, and weâ€™ll continue to bring further performance and performance/W optimizations to the Radeon RX 480.
1: Based on data running â€™Total War: Warhammerâ€™, ultra settings, 1080p resolution. Radeon Software 16.6.2 74.2FPS vs Radeon Software 16.7.1 78.3FPS; Metro Last Light, very high settings, 1080p resolution, 80.9FPS vs 82.7 FPS. Witcher 3, Ultra settings, 1440p, 31.5FPS vs 32.5, Far Cry 4, ultra settings, 1440p, 54.65FPS vs 56.38FPS, 3DMark11 Extreme, 22.8 vs 23.7 System config: Core i7-5960X, 16GB DDR4-2666MHz, Gigabyte X99-UD4, Windows 10 64-bit. Performance figures are not average, may vary from run-to-run.