15" 2015 MacBook Pro - Win 8.1 - No 1440x900 resolution option

I HAVE SOLVED THIS!

This is amazing, and I'm sure other people who like to play 3D games will appreciate this.

The solution is to go into the registry and find your video driver, and add a line. Reboot. Done. The trick is simply finding the registry entry. I cannot take credit for the images since I just googled them. Because this deals with manipulation of the registry, please read the steps and follow them closely before editing anything!! Keep in mind, the images here are just ones found on the internet, so the values you'll be looking for and adding are going to be different!

First, go to this section of AMD Catalyst Control Center and jot down the 2D Driver File Path somewhere:

Next, load up regedit and navigate to the Driver File Path that was highlighted in YOUR Catalyst Control Center... not the one in the images in this post:

BEFORE MANIPULATING THE REGISTRY ENTRY: Make a backup of the DALNonStandardModesBCD1 key by exporting it through the file menu. Keep this backup file safe in case you need to restore its original setting in Windows Safe Mode (just double clicking on the file in safe mode should restore its entry to the original setting)

You will now double click on this registry entry key and add a line to the bottom:

Regedit automatically adds spaces. For 1440x900 resolution, type in:
14 40 09 00 00 00 00 60

You'll notice the 8 characters on the right change as you type in the value. I'm not sure why that is. Just leave it!

Click OK, reboot the computer, and VOILA! Windows and all of your games in your library are able to run at exactly one half resolution, resulting in some sharper visuals and even better frame rates.

I hope this helps someone out there looking for the same thing I was... took about a half a year to find!

Good luck! Please let me know if this helps you!

Hi Loner,

Yeah, checking List All Modes shows no 1440x900 option:

It does function, but as it's not half of the native resolution, the resulting image is somewhat blurry looking.

Bumping this thread because 1440x900 is still not a display mode option even after updating to Boot Camp 6.0

AMD Driver installation directly from amd.com also results in an error saying that compatible hardware was not detected.

All I want is to play some Windows games at half resolution.

--edit--

Attached image of the AMD Driver error in question (The Apple-installed driver prompted me to download and install this update, which fails because of the error)

Hi bebze,

Yes, it was actually working fine before the "Boot Camp 6" package was released. I updated my Win 8.1 to 10 through the standard Microsoft upgrade tool... not a clean install.

The driver package is probably locatable somewhere online, but I'm not sure.

In Mac OS X, the Boot Camp Assistant is able to dump all the packages onto a USB drive and you could try to clean-install the driver there. AMD's driver installer will not work because apparently it's some special AMD chip only for Apple computers... or it's still so new it's not available for other computers on the market (despite it being an old chipset).

If you've already tried using that, I'm not sure what else could be done to install the driver on your system... but maybe someone else does!

Good luck!

-Chris