I have bought two ATI Radeon 4350 HD graphics cards and they both work well seperately. But only the first one will output most of the time. If I go to System - Appearance - Monitors it will only detect the monitor on the first graphics card. I have check using hardinfo and the system has definitely detecting both of the graphics cards so I don't know why it isn't detecting the monitor. I am running Maverick 64 bit