Asus Strix R9 380 Crossfire Help

[NinaT]

Hello, everyone i'm new to building computers, and I can't seem to get my Crossfire to work properly.

OS: Windows 10 Professional
Processor: AMD FX 8350 4.0Ghz
RAM: 32 GB RAM (HyperX x4 (8GB)
Graphics: ASUS STRIX R9 380 4GB (x2 crossfire)
DX12

So when I'm currently playing FF14, on Fullscreen my crossfire is enabled but hitting around 30-45 FPS, however when i change it to windowed mode, my crossfire is disabled but i'm hitting 49-55 FPS sometimes even 60 FPS, I downloaded the most recent Drivers from AMD, but It seems like my crossfire is not working properly, any suggestions?
I know before When i had windows 7 Home Premium, I was hitting around 80-100 FPS in max settings when Crossfire was enabled, so now i'm unsure of what the problem is, Please dont say go back to Windows 7, I've spent 24 hours literally to get Windows 10 Professional to work, and even had to get Microsoft to remote link to assist me with it and after a long 10 hours and 4 different ways of installing it, Windows 10 Pro finally works.

So any suggestions of what might be the cause, I was planning on using DUU and reinstall the current Drivers, but idk

 

[Alan Caldwell]

Yeah.

Try this,
First of all you need to TOTALLY remove all the old drivers. Use this link.
http://www.wagnardmobile.com/DDU/
Note:
Select the respective company(i.e Nvidia or ATI) drivers to be uninstalled.
Use clean and restart option.
And then install the new drivers after rebooting.

If that doesn't work, try older drivers.