Hello everyone, I bought on ebay the GTX 570 along the GT120 for my video editing workstation. It seems the GT 120 works just fine but the GTX 570 is acting really weird. My config: 2 computer monitor (using the DVI output of the GT120) 1 LCD monitor (using one of the DVI output of the GTX 570) MAC PRO late 2010 8 core with 16G of RAM and OS X 10.7.4 Could anyone guide me through the install of those card please ? I currently use the ATI 5770 and need to upgrade. Are they any drivers that should be installed ? Any scripts ? Why is the GTX 570 not displaying anything ? Thank you folks.