Replaced my 6600GT with an Asus 6800GT but the monitor says no input detected. 
 Should I uninstall drivers first before putting in the 6800GT ? Or my Antec 450W PSU is not enough to run it ? Was using a leadtek 6800GT before so I doubt my PSU is not up for it. I've also got 2x HDD and 2x DVD-RW.
	
		
			
		
		
	
				
			
 Should I uninstall drivers first before putting in the 6800GT ? Or my Antec 450W PSU is not enough to run it ? Was using a leadtek 6800GT before so I doubt my PSU is not up for it. I've also got 2x HDD and 2x DVD-RW.