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GTX 970, DP and 4K problem

Joined
Mar 13, 2012
Messages
40
Motherboard
ASRockZ390 Extreme 4
CPU
i7-9700K
Graphics
RX 580
Mac
iMac, MacBook Pro
Mobile Phone
iOS
Hi people.I just buyed a 4K thinkvision x1 display connected to my graphic card via DisplayPort.
Video card bios is updated, cable is high end but I have a problem. selecting resolution in the displays preference section os system preference I can get as native resolution only 1920x1080 and desktop and interface size are dimensioned according to this resolution.
System report at the displays section show:
Resolution: 1920 x 1080 @ 60 Hz
but...display section of about my Mac show X1 display, 27-inch (3840 x 2160), NVIDIA GeForce GTX 970 4095 MB
if I made a screen capture the size of captured images is 3840x2160.
using bridge displaying an images at full resolution from y camera (6720x4480) I an see 3840 pixel horizontally and 2160vertically.
It seems like OS set user interface only at 1920x1080 but everything is displayed at 3840x2160
can anyone help me please to set te UI at 4K ???thanks
 
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