detecting three monitors on Nvidia Quadro P600 card issue

there monitors setup in Windows 10 Prof

I have  new dell Precision 3420 SFF
I installed a Nvidia Quadro P600 card so I can use 3 new Dell monitors DisplayPort connection
it detects only two monitors
I went to Nvidia drives and installed the latest driver all of Windows 10 is up to date and still cannot detect third monitor

any suggestions?

thanks
LVL 1
jsarinanaI.T. ManagerAsked:
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Scott CSenior EngineerCommented:
Try a different port on the card....Make sure the connections are good and that the monitors are turned on.

After that, call support...

http://www.nvidia.com/object/support.html
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Casey WeaverNetwork EngineerCommented:
What version of the Quadro driver are you currently using? You don't have any other monitors plugged into the onboard ports, right?
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jsarinanaI.T. ManagerAuthor Commented:
Sorry but I figured it out, it was a bad Display port cable. It was a new but defected cable
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Scott CSenior EngineerCommented:
That can happen.  Glad I could help.

That's why I suggested checking the connections.
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