Displayport Error... PLEASE HELP!

Hi Guys, 

So im having a problem here.. 

I bought a new projector for my setup, my Graphics card has two DVI ports, one HDMI and one Displayport. 

Up until now i've been using the HDMI port for my monitor but I now need to change his and use the Displayport for my monitor which also has a Displayport as the Projector will use up the only HDMI port.

However, when I connect the Monitor with the Displayport cable I get an error saying: displayport link failure. 

I Dont know what the problem is, I've tried using another brand new cable and it still doesn't work. I updated all the relevant drivers.  

Here are the Specs to my Rig: 

CPU: AMD FX-8350 4.0GHz 8-Core Processor 
CPU Cooler: Corsair H100i 77.0 CFM Liquid CPU Cooler 
Motherboard: Asus Crosshair V Formula-Z ATX AM3+ Motherboard 
Memory: G.Skill Trident X Series 16GB (2 x 8GB) DDR3-2400 Memory 
Storage: Kingston HyperX 3K 240GB 2.5" Solid State Drive 
Storage: Seagate Barracuda 3TB 3.5" 7200RPM Internal Hard Drive 
Video Card: Asus Radeon R9 280X 3GB DirectCU II Video Card 
Case: Cooler Master Storm Trooper ATX Full Tower Case 
Power Supply: Corsair RM 750W 80+ Gold Certified Fully-Modular ATX Power Supply 
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer 
Monitor: AOC i2367Fh 60Hz 23.0" Monitor 
 
 
Would really appreciate if anyone can help me out with this! 

Is it the monitor connected to the port reading that, or the hdmi projector? Also do you have any other display port cables you could try?

Sorry I just reread your post and saw that you already tried a new cable. Is it occurring after you recover from sleep or anything like that? I have read some people having issues then.

I just came across this thread on a different forum. It sounds like some cables aren't complient. http://www.rage3d.com/board/showthread.php?t=33998432