External Monitor 144hz problem

Hi folks,
at the beginning I would like to thank you for the information about alienware that helped me to prove that my laptop has a problem with the cpu throttling. Yesterday I received a new unit upgraded to a new generation of cpu. Without you it would'nt happened.

AND

right now i have problem with my aga and monitor connection .
I always used external monitor with 144hz connected directly to AGA with cable dvi-d - hdmi and it works great when i was closing my alienware so i was only using this external screen on refresh rate to 144hz.

But right now i want to use both of screens so main screen lcd alienware 60hz and external screen with 144hz connected directly to aga but when i just expand those screens and changed on second refresh rate to 144hz video and image is not that smooth like when i was on only on external with 144hz. And all games displaying on external monitor lagging like hell.
So maybe problem is with cable connection??
Maybe i should use displayport or sth?

Thanks for help

 

I'd try the displayport. If that doesn't help, it may simply be not possible. I'll try to replicate that in the lab as soon as I can.

 

Never try 120Hz + on HDMI, its very flaky depending on the port versions.
Always use DVI-D Dual Lane or Display Port.

Can you go into the Nvidia Control Panel -> Adjust Desktop Size and Position - > Make sure display scaling is set to GPU instead of display?

 

Thanks.

I made some test and i used displayport and its working great.