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Serious issues with a 5080, asking for advice
- Thread starter Markbros
- Start date
Sorry to disappoint you but if you look in the details it's Chinese:
Amazon listing said:
The best DisplayPort cable KabelDirekt offer is DP 2.0 UHBR10.
It makes sense if you have a 4k@240Hz monitor and you want to max out its performance. Once you see that with games like Cyberpunk and MFG in action, you realize that you are playing another league.
In any case that deviates the focus from the main topic, which is the video output issue. I didn't expect that when I thought on the GPU replacement.
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F@ck, you are right... and the ******** put German flags everywhere. At least I hope it's a German design, the little documentation coming in the package is in German and the contact information points there too. Things of the globalization I guess, these days you can also buy a pretended American Tesla that could be 100% made in China (lucky me, mine was made in Berlin xDD).
BTW the cable you posted is DP 2.0 and supports 4k@144Hz only. I guess that if the same brand advertises another cable featuring 4k@240Hz, it should reallly support a higher bandwidth.
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Sounds like cable issues to me
Make sure with the LG OLED 32GS95UE-B you are using a good HDMI 2.1 cable (Fibre one)
Don’t use DP.
Also check the monitor is set to use DSC with HDMI.
Settings > General > Input Compatibility Version is set to 2.1(PC)
Make sure with the LG OLED 32GS95UE-B you are using a good HDMI 2.1 cable (Fibre one)
Don’t use DP.
Also check the monitor is set to use DSC with HDMI.
Settings > General > Input Compatibility Version is set to 2.1(PC)
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Thanks, you seem to know what you are talking about, regarding this monitor.
The Compatibility Version was already set to 2.1(PC) on HDMI, and is set by default to 1.4(DSC) on the DP.
This is the cable I was using:
https://www.amazon.es/gp/product/B08CRN8357
It's HDMI 2.1, has a bandwidth of 48 Gbps, and is apparently compatible with 4k@120Hz. Maybe I'm forcing it too much at 4k@240Hz, but then why the hell was it working fine with my old 4080??
The series RTX 5000 specifies the HDMI output in the version 2.1a. All the cables I found on Amazon in this version 2.1a claim to support 4k@120Hz only, and have the same 48 Gbps bandwidth (I actually can't find any other HDMI cable on Amazon with a higher bandwidth). I found others simply 2.1 that claim to support 4k@240Hz and seem to have a checkable certification from HDMI.org. Check this one:
https://www.amazon.es/Ubluker-Certificado-Oficialmente-10k60Hz-4k144Hz/dp/B08TGBLLXY
Do you think it worth giving it a try? Or do you think it's better to try one 2.1a even if they don't claim to be compatible with 4k@240Hz?
That's not a certified HDMI 2.1 cable, that's just labelled HDMI 2.1 but could be pretty much anything...
This one is certified, as you can see it has a certification tag and some have a QR code that can be scanned so you can view the certificate
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It is weird that your current cable worked using your 4080.
I would try switching the input compatibility from 2.1(PC) to 2.1(AV) this will cause the monitor to go black for a few seconds and come back at 4K 120hz as DSC will be disabled.
I would then switch it back to 2.1(PC) and see if you are able to select 4K 240hz.
I would also check if you able to switch the monitor to 1080p 480hz and back and see if that does anything.
If they both fail to fix it, I would try a certified 2.1 cable that is under or 3 meters.
I would try switching the input compatibility from 2.1(PC) to 2.1(AV) this will cause the monitor to go black for a few seconds and come back at 4K 120hz as DSC will be disabled.
I would then switch it back to 2.1(PC) and see if you are able to select 4K 240hz.
I would also check if you able to switch the monitor to 1080p 480hz and back and see if that does anything.
If they both fail to fix it, I would try a certified 2.1 cable that is under or 3 meters.
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I set that setting to AV and then switched back to PC, and the 240Hz were available again.
At 1080p, the 480Hz was not available, unless I clicked on the physical button this monitor has to quickly switch to that mode. Then yes, I was at 1080p@480Hz.
Interesting thing though, was that when I clicked again that button to get back from that mode to 4k@240Hz, the monitor started to blink every few seconds, after a minute or so when it got stabilized.
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Soldato
- Joined
- 23 Jun 2004
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- Blackburn
If everything worked fine with the 4080 and nothing else has changed other than the GPU then it doesn't take a genius to come to the conclusion that it's either the 5080 or drivers that are at fault.
Awesome, so it’s working again? Do you have full 4k 240hz + sound?
Yes I am at 4k@240Hz but still having issues while gaming.
With the HDMI cable I never lost the sound. It was with the 2.1 DP cable that I was not getting sound at 4k/2k if the freq was set to 144Hz or above.
Waiting to receive the new cable and post my results tonight after doing some test.
Associate
- Joined
- 22 Oct 2012
- Posts
- 1,218
I think a lot of this comes down to DSC:
The RTX 5080 has DP 2.1, but your monitor only supports DP 1.4
- This means your DP connection is at 1.4, no matter what cable you use
- DP and HMDI can both use Display Stream Compression (DSC) to compress the image to fit
- Your required bandwidth at 4K, 10-bit colour, 240Hz = 68.56 Gbps
- HMDI 2.1 Bandwidth = 42.67 Gbps, so 161% usage
- DP 1.4 Bandwidth = 25.96 Gbps, so 265% usage
- Source of Bandwith calcs: https://trychen.com/feature/video-bandwidth
To your specific tries to get things working:
- DP 1.4 max refresh rate without DSC = 97 Hz (very close to the 95Hz which works)
- HDMI 2.1 max refresh rate without DSC = 155 Hz (can you try 144Hz and see if that works?)
In summary then, everything you're getting severe video issues with, you're using DSC. I haven't heard of DSC specific issues this generation, but my guess as the culprit is issues with either the ports (unlikely as multiple are affected) or the hardware on the card causing signal issues. In other words all the above calcs point to you being at the edge of what is possible via with DP and a degradation in signal could cause these issues. HDMI should be able to leverage its additional bandwidth, and we are likely seeing it do that.
Things to try next:
1) Try HDMI at 144Hz, as that should be ok
2) Try a new HDMI 2.1 cable: in theory this should be capable of 240 Hz, 4k, 10 bit colour with modest compression
3) Question: are your cable runs really long by any chance?
If 1) works, this lends a bit of weight to the idea its signal degradation interacting with DSC, if 2) works then you've got a workaround which could potentially allow you to keep your GPU until stock improves.
My conclusion though is neither DP 1.4 nor HDMI 2.1 should really have issues; unless your cable runs are long this should all be working as with your 4080, albeit with a heft dose of compression. It's therefore likely a card issue.
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Tonight I'll do more tests with the new cable and I'll post the result. Tomorrow is my deadline for communicating the return to the retailer
Hi. The new 2.1 HDMI cable arrived and I did some tests with it but unfortunately I get the same random monitor blinking issues, not only when playing but also when doing any other activities in Windows.
They also happen when lowering the frecuency to 144Hz.
After all the test I did with several DP and HDMI new cables on the latest standards (and knowing that my old 4080 was working fine at 4K@240H), I'm finally more inclined now to think that the root of the issue is within the graphics card (either if it's software or hardware related).
Moeover, for now there is no clear evidence of recognition from Nvidia about the issues that are happening under my specific conditions (just some communication addressed to a media where they confirm to be aware of a wide range of video issues and that they are working on a solution, so I have no clear expectation that my issues are going to be solved with the next driver.
Therefore at this point I'm afrfaid itis wiser to start the return process with the retailer and claim for a refund. I'll try to get another 5080 when it becomes available in few days or weeks, hoping that I will not get this type of issues again.
aNyway, thank you all in this community for the support you have given through this thread.
They also happen when lowering the frecuency to 144Hz.
After all the test I did with several DP and HDMI new cables on the latest standards (and knowing that my old 4080 was working fine at 4K@240H), I'm finally more inclined now to think that the root of the issue is within the graphics card (either if it's software or hardware related).
Moeover, for now there is no clear evidence of recognition from Nvidia about the issues that are happening under my specific conditions (just some communication addressed to a media where they confirm to be aware of a wide range of video issues and that they are working on a solution, so I have no clear expectation that my issues are going to be solved with the next driver.
Therefore at this point I'm afrfaid itis wiser to start the return process with the retailer and claim for a refund. I'll try to get another 5080 when it becomes available in few days or weeks, hoping that I will not get this type of issues again.
aNyway, thank you all in this community for the support you have given through this thread.
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Associate
- Joined
- 22 Oct 2012
- Posts
- 1,218
For what it's worth mate, I agree. Something is dodgy about the way that card is handling video outputs. An RMA is the right call.