Questions about the Intel Core i7-4770S @ 3.10GHz.

[Will Hogan]

I'm looking at buying this computer.
http://www.harveynorman.com.au/computers-tablets/computers/desktops/asus-m51ad-au009s-desktop.html
I want to be able to play games on this was looking at buying an AMD R9 280x and getting rid of the 750 that comes with it.
Is this viable?

 

[4745454b]

Not sure if the case is big enough. You'll probably need to upgrade the PSU as well. Might want to get a non S CPU.