I have a computer that I need to run about 15 meters or 50 feet away from the monitors. Currently I have two DVI monitors that have resolution of about 2500x1600. I want to run two 4k monitors instead 3840 x 2160. Since this is run very far I have to transfer the signal to something else to run it. I have already purchased two Gefen 4k HDMI to Cat5 converters <http://www.gefen.com/kvm/gtb-hdmi-3dtv-blk.jsp?prod_id=9420> Everything else I saw displayport converters extenders ext does not run full 3840 x 2160. The Gefen ones only run 30hz though. This is not Gefens fault but a limitation of hdmi.

With 30hz a see a mouse lag. I am fine with the video and look of the monitor though. Question is, is there a way to get rid of the mouse lag? I purchased the computer 5 or so years ago so it is time for a new one. I was thinking an i7 6 core 3.5 or the i7 8 core extreme 3.0. Do you think this and a 4gb video card will remove the mouse lag? Or is mouse lag on 30hz just a defect of 30hz no matter what processing power you have?