I have 3 monitors connected through displayport cords and they do not turn on when my PC powers up and only turn on after I hit the PC's reset button.
Here are some details:
Graphics card has 3 displayport ports, 1 HDMI port, and 1 DVI port.
When I first got the PC I was only able to connect one monitor through a DVI cord, no problems. While searching for DP cords so that I could use all 3 monitors at 144Hz I came across 2 HDMI to DP cords so I ran all 3 monitors with them and had no problems (1 DVI and 2 DP to HDMI cords).
When I finally got my hands on 3 DP cords I started having this issue where my monitors wouldn't turn on with my PC and only turned on when I reset my PC. So daily I turn on my PC, wait 20 seconds with blank monitors (they say they are not connected) and then reset it.
This is where it gets weird. I tried 1 DIV cord and 2 DP cords, problem still happened. Then I tried to go back to the 1 DVI and 2 HDMI to DP cords and it works fine. I'm not sure what the problem is.
I'm at a loss for a solution. Happened in Windows 8.1 and the problem still happens in Windows 10.
StarTech.com DISPLPORT6L DisplayPort Cable with Latches, M/M, 6-Feet Insignia 1.8 m (6 ft.) DisplayPort/HDMI Cable Intel Core i7 4790K Unlocked Quad Core HT 4GHZ/4.4GHZ Processor LGA1150 Haswell 8MB Cache Corsair Cooling Hydro Series H60 CPU Cooler System LGA1150 1155 1366 1156 2011 AM2 AM3 FM1 & FM2 ASUS Maximus VII Ranger ATX LGA1150 Z97 3PCI-E16 3PCI-E1 SATA3 USB3.0 CROSSFIRE/SLI HDMI Motherboard ASUS GeForce GTX 980 Strix 1279MHZ 4GB 7.0GHZ GDDR5 DVI HDMI 3x DisplayPort PCI-E Video Card Corsair CS650M CS Modular 80 Plus GOLD-RATE 650W 12V Power Supply 3x ASUS VG248QE 24IN Widescreen 1920x1080 144HZ 1ms HDMI DisplayPort DVI-D 3D Vision LED LCD Monitor Corsair Force LX 128GB 2.5in Solid State Drive SATA2 SATA3 MLC 7MM 560MB READ/150MB Write SSD Western Digital WD1003FZEX Black 1TB SATA3 6GB/S 7200RPM 64MB Cache 3.5in Hard Drive OEM