If Catalyst Control Center can install properly and the installed driver works with it, you will still have scaling capability. I forced the video card driver that came with version 13.4 to install and the 13.4 Control Center has full functionality.
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I don't know if Control Center will have full functionality with the Windows installed driver - mine wouldn't.At my situation I had bsod at shutdown with the 13.4 ati beta driver (2x4890 sapphire). The computer was impossible to shutdown, it was doing restart every time I was choosing shutdown and I discovered that was crashing at shutdown. With windows driver working ok no problem at all. Computer Type: PC/Desktop OS: win 10 x64 pro CPU: intel i7 960 Motherboard: Asus Rampage iii extreme Memory: mushkin ddr3 1600 998679 6x2gb Graphics Card: sapphire R7 370 vaporx Sound Card: Asus xonar u1 Monitor(s) Displays: Eizo s2110w Screen Resolution: 1680x1050 Keyboard: Filco Majestouch Linear US ASCII 104 Cherry Black Mouse: Logitech g9x PSU: coolermaster ucp 1100w Case: Lian Li PC-V1110B Cooling: Thermalright Ultra-120 eXtreme Hard Drives: wd wd3000hlfs wd wd5000aaks Seagate st31000524as Samsung MMCRE64G5MPP-0VA. You need to uninstall your previous AMD Control centre (Remove everything) and restart your computer, and then install the windows 7/8 AMD legacy driver (AMD Catalyst 13.4 Legacy Driver) under compatibility mode windows 8 with administrative rights (Right click on setup and select compatibility mode Windows 8, place tick in Administrative rights), this will then give you partial Catalyst control centre.