PC stuck in boot loop when cold booting using Displayport

[Agent Orange]

Hey there OC,

Hoping someone might be able to help me with an issue which has only started happening with my PC since I purchased an Acer CB280HK 4K monitor.

I love the monitor and resolution, but I use Displayport in order to gain the 60hz signal at 4K as required. However, some days when I turn the PC on for the first time that day, my PC resets itself after a few moments and gets stuck in a boot loop and will not start up. I have to turn off the power supply switch, unplug the Displayport cable, and then let it boot up and plug the Displayport cable back in after I know it's loaded to Windows log in screen.

Just wondering if there's any settings on the monitor, BIOS etc that you know of that I could change to sort this out? It works fine with HDMI on this monitor and my old one - my old one doesn't have a Displayport connection to test that though.

One thing I've noticed with using this monitor/Displayport is that the PHASE LED lights on my mobo are staying on after I turn off the PC for the night. I think this might have something to do with it, possibly with my C states in BIOS, but I have a couple of things I like charge from USB ports overnight. I guess I could live without that though if it meant this would be fixed! But from what I've seen online, it looks like some weird compatability issue with Displayport and my motherboard and may not be able to be sorted.

But if you guys know of anything I would be very appreciative! I'm very sorry if this has been discussed somewhere here before but after a bit of research I couldn't find anything.

My specs are up to date in my sig if it helps any!

Cheers guys,

Adrian

 

[snips86x]

Have you tried setting the BIOS to default and booting? Adding a 4K monitor won't change the boot cycle, sounds like a stability issue.

Are the 290s overclocked?

 

[Agent Orange]

One other thing - I've removed that overclock on my CPU thinking that might be it, but it still does it. Everything running at stock at the moment, until resolved.

 

[Agent Orange]

Wow yeah thank snips forgot to mention that until one second ago as you were replying!

 

[johnnystuff]

I don't know if that's the case but have you checked if your DP cable has 19 or 20 pins? There have been similar problems using the 20 pins ones cause they send a sort of "voltage feedback" back to the gpu or anyway create a loop between the monitor and the gpu that may cause freezes and even damages. Again, I'm not sure this can be your case but.... my 2 cents

 

[Agent Orange]

Thanks m8 I will check that out and if it's a 20 pin, look at getting a 19 pin. No one seems to know the answer so can't hurt to try it!