Monitors Shiny new macbook pro to samsung 4k display screen flickering issue.. Help !!

Hi,
I have bought the macbook pro 15-inch with 4gb graphic card and have samsung UE590 series 4k monitor ( has HDMI & display port).
I bought a usb-c to display port cable ( ppl have used it to connect macbooks with their 4k monitors and are getting 60hz in the reviews).
When I connect , the display in the monitor is flickering and getting on and off every second.
What do I do? I'm new to mac OS also.
Anyone who knows mac OS can help?

Thanks in advance.
 
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