Intermittently during gameplay, I'm getting a crash or freeze where the screen goes a solid color with vertical lines. Audio keeps playing, either normal music continuing, or a loop. No response to Alt-Tab, Alt-F4, Ctrl-Alt-Del or anything short of the reset or power button. 
  
Not getting any crashes or artifacting in any other games or stress tests like Prime95, IBT, Furmark, 3DMark, Unigine Heaven, I have to assume this is not a hardware issue. Temperatures are also not an issue. 
  
Hardware specs: 
Core i5-3450 
Asrock Z75 Pro3 
2x4GB Corsair Vengeance DDR3-1600 CL9 
MSI Radeon R9 270 
Corsair GS600 
  
Running 64-bit Windows 7 Home Premium SP1, and with Pillars installed on a 256GB Crucial MX100 (less than half full). Latest release GPU driver, AMD Catalyst 14.12. 
  
I've attached an output log from the latest crash. 
  
output_log.txt