I’ve posted initial findings about the excessive PCIe power draw issue here. AMD promised a fix for it and today they’ve delivered it in a form of a new driver.
Like I’ve predicted, modern graphic cards have very flexible power delivery system and Polaris is no different. What AMD did here was rearrange the power delivery between PCIe slot and 6pin power connector. Now, Radeon RX480 draws power from PCIe slot within specified limits and draws a bit more from 6pin. Officially 6pin is rated at 75W, but can realistically deliver up to 150W. So, redirecting power like this solves the initial problem while doesn’t impair performance at all.
AMD did provide additional “Compatibility Mode” which restricts power usage even further. I frankly don’t think anyone should ever enable this, but if you feel like saving some extra watts, you can enable it in Radeon Settings.
To verify the fix, TechPowerUp ran a test and everything is in order just like AMD promised.
You can read the TechPowerUp re-test here.
The PCIe power draw fix is included in AMD Radeon Crimson Edition version 16.7.1, so make sure you upgrade the drivers asap. Btw, AMD dropped a small 3% performance boost for popular games in this driver so even if you use Compatibility Mode, you shouldn’t see any performance difference.
I really like the way things turned out here. Firstly, for reviewers to point out the issue and secondly for AMD to professionally fix it. An the ones who benefit from all this the most are us, the customers. Yay🙂