HELP! How to Get my GTX650(hdmi) and my Dell u2211h(Displayport) working?

[Gustavo Gonçalves]

Hi!

I have a pc hackintosh running Mavericks (10.9) and i just cant make my monitor work by the Displayport.
My Graphics Card is a GTX650 from NVIDIA that have a HDMI port, and my monitor is a DELL u2211h
That have a DisplayPort on it.

I've bought na adapter (HDMI x DP), connected a hdmi cable and plugged in my hdmi graphics card.
after plugging the Displayport side on the monitor and switch the menu for Displayport signal, it shows the message:
"Entering Power Safe mode".

The pc keeps working normally, but the monitor seems to be in Stand by mode.

Can somebody help-me?

Many Thanks!