This machine might be barely OK with that added GPU but the Windows install is anything but easy. Let's hear (read) your install plan.
Bob
AMD A6-5400k APU DUO core
R9 270
16gb mem DDR3 1866
500gb HD
Windows 7 Pro 64bit
Trying to get Crysis 3 to work on this build and tried everything including DX fixes and updates nothing allows it work. The game starts all the way to the menu but once you hit new campaign it locks up and crashes to black screen and you have to ctrl+alt+delete to back out and shut game down in the task manager. I have tried all kinds of forums including Gamespot however the site won't let me create a new tread for help can someone suggest anything to help try and get this game running

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic