Tested in Black Death shadows off .Ok but usual screen hesitations low . 
Switched to cross country in Spit first then Blemmy.Was getting video crashes with the screen refusing to work although the rig was still running . 
Tried rig unclocked or clocked got the same results . 
GPU`s never clocked before so Acivated Overdrive ,temps low (41deg) but set the voltages up and tricked the cards into thinking the fans were at 100%.(None fitted as on Ek waterblocks )did not up clock speeds .Stopped the screen crashes. 
Power supply checked and found to be giving correct output even under load . 
No log files as the game was stil running. 
Regardless of video settings /texture/buildings/trees,still have those pauses at low alts. 
Conciderable  improvement  in performance in X-Fire now ,Good Job ,just need a decent profile from AMD now . 
Will check with XFX  to see if there have been any relative bios updates  for their cards.
		 
		
		
		
		
		
		
			
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				ASUS Sabertooth 990FX R2.0 AMD FX-8350@4GB Watercooled 
2X8GB Crucial 1866 - 2x XFX HD 7970 Black Edition in X-Fire, Water Cooled 1900X1200 Native res 
OCZ AGILITY 3 240GB O/S WINDOWS 7 Home Premium OCZ AGILITY 4 240GB WESTERN DIGITAL 500GB
			 
		
		
		
		
		
	
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