I bought a Dell P2715Q because the sp2 supports 4K displays. I attached the mDP to DP cable that came with the monitor and I can't not get it to go above 2650x1440. I've loaded the newest intel drivers. I tried to go through the settings, but when I "list settings" the max that it has is 2560x1440 at 60hz. on the phone with MST, they had me try an HDMI cable which got me 4K @ 24Hz, but it looked all weird. Any help?