Thanks,

Here's how I confirmed it.

Get Catalyst (fglrx) version number:

dmesg | grep fglrx | grep module

outputs:
      fglrx: module license 'Proprietary. (C) 2002 - ATI Technologies, Starnberg, GERMANY' taints kernel. 
      fglrx] module loaded - fglrx 14.20.7 [May 22 2014] with 4 minors                                   
      
Date corresponds with Catalyst 14.6 beta linux version anyway.
      
Googling "catalyst fglrx 14.20.7" confirms it.