I'm currently using my Dads computer and notice there is a huge delay and trail whenever moving the mouse. He is so used to it he doesn't realise it's there.
The problem is that he bought two 4k monitors:
27" 4K UHD (3840 x 2160) IPS DisplayPort, HDMI, DVI 4 ms Response Time 300 Nit Brightness
This is the setup he is running:
AMD Radeon R9200
Let me know if you need anymore information, how do I troubleshoot this? is there software I can download to help me with the process