Updated to ML today, installed GTX680 and rebooted. Running 2 displays from DVI outputs. I am getting horrible display on my 27" NEC PA271W monitor - it should be native resolution of 2560x1440, but the card is sending 1280x1440. It does this if in "best for display" mode and also seems to send the same resolution for multiple other "scaled" choices, but a few will change the actual resolution sent (1024x768 for example). Do I need to install another driver or change something else? The quality is HORRIBLE due to scaling. From my reading, this should be plug and play, but there obviously seems to be an issue with the driver and resolution. I went to Nvida site but there are no drivers listed for mac OS. Interestingly my secondary monitor (NEC PA241w running portrait) is fine running 1920x1200.