Question No signal from GPU Display Ports

[JohnR1987]

I recently purchased a new gaming PC with an Intel Arc B580 GPU that has three Display Ports — but none of them are sending a signal to my primary monitor. There's also a DP port on my motherboard (ASUS TUF GAMING B850-PLUS), which also doesn't work (although I want to connect the monitor to the GPU for maximum performance anyway).

For context, this monitor was working via Display Port the same day as my new PC arrived, so I know there's nothing wrong with the cable or the port on the monitor. My monitor is an MSI Optix G27C4.

Some things I've tried so far:

- multiple variations of replugging in / switching on and off again / switching manually from HMDI to DP via the monitor controls
- checked cable is securely seated in the port
- made sure GPU drivers are up to date
- turned off FreeSync (based on someone's suggestion)
- Enabled Spread Spectrum in the BIOS (based on someone's suggestion)

When trying to figure this out I've found loads of posts from people having this problem, so I'm confident it's just some setting somewhere rather than a hardware issue, but it's hard to troubleshoot when there's no 'error' message!

 

[Lutfij]

I recently purchased a new gaming PC with an Intel Arc B580 GPU
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

If you don't own an F SKU processor, are you able to get into BIOS without the discrete GPU?

 

[JayGau]

I don't understand. If you enabled something in the BIOS it means that you are getting an actual display signal. Or does it work with the HDMI output but not the DP ports?

And what do you mean by "this monitor was working via Display Port the same day as my new PC arrived"? Was it working with another computer, or was it the new one but it stopped working at some point?

 

[JohnR1987]

I don't understand. If you enabled something in the BIOS it means that you are getting an actual display signal. Or does it work with the HDMI output but not the DP ports?

And what do you mean by "this monitor was working via Display Port the same day as my new PC arrived"? Was it working with another computer, or was it the new one but it stopped working at some point?

Sorry yes I should've made clear that I can connect the monitor via HDMI.

Second point yes, it was working via DP on my old PC.

 

[JohnR1987]

CPU: AMD Ryzen 7 9700X
CPU cooler: PCS FrostFlow 240 Series
Motherboard: ASUS® TUF GAMING B850-PLUS

Ram: 64GB Corsair VENGEANCE DDR5 5200MHz CL40 (2 x 32GB)
SSD/HDD: 1TB CORSAIR ELITE MP600; 2TB CORSAIR CORE XT MP600
GPU: 12GB INTEL ARC B580 LIMITED EDITION
PSU: CORSAIR 650W CX SERIESTM CX-650 (brand new)
Chassis:
OS: Windows 11
Monitor: MSI Optix G27C4

Added above, apart from the chassis - because I'm not sure what that is...

BIOS version: 1028 x64

 

[JayGau]

Although DP cables are backward compatible, your Intel GPU has DP 2.1 outputs and it's very likely that your old computer was working on 1.4 (and your monitor seems to have only 1.2). If the cable is poor quality it may not be able to process the signal from the 2.1 port. That's a stretch, but since nothing else seems to be working you could try a cable certified DP 2.1 and see if you can get a display (keep in mind that you will always be limited by the DP 1.2 on the monitor side).

You could also try a DP to HDMI cable to see if you can at least get a signal from a DP port to the "you know it's working" HDMI input on your monitory (the other way around would not work by the way).

 

[JohnR1987]

Although DP cables are backward compatible, your Intel GPU has DP 2.1 outputs and it's very likely that your old computer was working on 1.4 (and your monitor seems to have only 1.2). If the cable is poor quality it may not be able to process the signal from the 2.1 port. That's a stretch, but since nothing else seems to be working you could try a cable certified DP 2.1 and see if you can get a display (keep in mind that you will always be limited by the DP 1.2 on the monitor side).

You could also try a DP to HDMI cable to see if you can at least get a signal from a DP port to the "you know it's working" HDMI input on your monitory (the other way around would not work by the way).

Well that certainly sounds logical. Just checked and my previous GPU (Geforce GTX 970) did indeed have a DP 1.2 port, matching my monitor.

I'll see if I can borrow a DP 2.1 cable before I invest in one. Thanks!

 

[JayGau]

Well that certainly sounds logical. Just checked and my previous GPU (Geforce GTX 970) did indeed have a DP 1.2 port, matching my monitor.

I'll see if I can borrow a DP 2.1 cable before I invest in one. Thanks!

I don't have a lot of hope that this will work (as I said the DP cables and ports are usually backward compatible) but if you can find one it would be an easy test to do.