Sapphire HD 7950 Mac Edition 3840 x 2160 at 60 Hz

Hello,

I'm looking to buy a new monitor for my cMP. The maximum resolution the HD 7950 Mac Edition graphics card supports according to the Sapphire website is 3840 x 2160 via a mini DisplayPort, but it doesn't mention at how many Hz, does anybody know? From reading the forums I understand 60Hz to be the magic number for lag free use, is this correct? If so, is anybody using this graphics card with a 3840 x 2160 monitor at 60Hz without issue? What make and model do you recommend?

Thanks...

Sapphire HD 7950 Mac Edition 3840 x 2160 at 60 Hz