Hi all - Forgive me if this has already been discussed, I'm new to the forum and can't seem to find previous posts on this subject. I recently got a 4k monitor (Dell P2715Q) that works well, but my mbp is a 1/2 a generation away from being able to support 4k at 60hz...apparently the late 2013 ones support 4k with the 700-series NVIDIA graphics card. Mine has the NVIDIA GeForce GT 650M. I can view 4k at 30hz, but that is awful... I can also do 2k at 60hz, though it shows up pixellated. But I'm dealing with it for now. Is there any way at all I could swap out my graphics card, despite the unibody? Has anyone done this? Suggestions? I'm desperate to keep my mbp going another year or two. Thank you!