Not really a specific Mac question, but it's related to two Mac systems. Would the two 4GB RAM chips --DDR3 204 pins 1600MHz that come in a current production iMac-- work without any health risks into a 2010 MacBook Pro which uses DDR3 204 pins but 1066MHz memory?
I think it's possible it worked, after all we'd be using a higher clock speed memory into a lower speed bus mobo, but I'm not sure it could cause any harm just trying it.