Mouse Lag at 3440x1440

[KGL]

Hi,

I just completed my first hackintosh build, and its running stable atm. The only problem i seem to have is that the mouse is really lagging when i run my display at full resolution (3440x1440) . In the display preferences the refresh rate is also locked to 30Hz, but the monitor can do 60Hz.
I have a GTX 970 Card and I'm running the latest nVidia web drivers.

Anyone got any tips?

Thanks

EDIT:
Actually managed to fix it! Changed from HDMI to display port, and now its working fine!

 

[CacheHit]

I have the exact same video card and resolution over HDMI. Switched to a DP -> mDP cable and all is well. Thanks for posting an update/edit!

 

[Jglynn]

Yep this has worked for me too, finally I can use my hackingtosh correctly.