Updating windows drivers under boot camp
I’m using Windows 10 with Boot Camp on my Mac Book Pro (Retina, 15-inch, Mid 2015).
As of April 2016, AMD has finally released an updated Radeon Boot Camp driver for the 2015 Mac Book Pro Retina 15″ and similar i Mac Retina models.
The updates will likely need to be downloaded and installed manually, since they may not show up in Apple's Software Update service.
Once downloaded, you can follow these instructions to install the update.
You will need an external hard drive or flash drive formatted to the FAT filesystem to perform this update: Along with standard bug fixes for the driver software, one of the new features of the Boot Camp update is implementation of 64-bit versions of the drivers, allowing for their use in 64-bit versions of Windows 7 and Windows 8.
If you use Boot Camp on your Mac, and especially if you are using a 64-bit version of Windows, then you might consider downloading and installing this update; however, be sure to fully back up your Boot Camp partition first.