Neo G8 4K 240Hz losing connection randomly for 1-2 sec

[Byogore]

Have a problem that kind of makes no sense to me. I swapped from an RTX 4090 Suprim to 5090 FE and now the monitor randomly turns off for 1-2 sec and recovers. Tried 3 different cables (Silkland DP 2.0 and IVANKY) also the default cable. All of these cables worked fine before. I am using the latest firmware.

The monitor wasn't even used at all after I sold the 4090. I just plugged it in after a month. When using GSYNC, this blackscreen never happens. When you turn off GSYNC (aka adaptive-sync on the monitor's settings), you lose connection to the monitor for 1-2 sec whenever it feels like it. Could be 1 minute, 15 minute or 30 minutes. This happens on desktop and in games. Monitor goes black and in the top left you can see the Display Port icon, as if I manually reconnected. Stock 5090 settings. You don't need to use GSYNC in NVIDIA Panel, you just need to have Adaptive-Sync enabled on the monitor (in case you don't want to use GSYNC but want to fix the issue)

I never had these black issues before with adaptive-sync off. Windows is fresh, DDU drivers multiple times, tried the last 4 drivers and it still happens on 572.83. I also tried the 1080p 240Hz BENQ that I have here and it didn't cause any blackscreens (didn't test it much tho) but I am guessing this is a driver issue with DSC and for some reason "Adative-Sync" set to enabled on the monitor the issue go away.

So what do I do now? RMA the monitor or is the GPU broken? It's hard to tell what's happening here. The GPU works fine under any stability test (3DMark etc) with max OC, heavy undervolt and also stock. Tried all ports (except HDMI since I don't have an HDMI cable atm but will soon)

Waiting on a SILKLAND 2.1 DP cable to try that. Edit: didn't do anything (not that I was expecting it to, wanted the cable anyway)

What a frustrating issue. Specs below

CPU: 9800X3D

GPU: RTX 5090 Founders Edition

Motherboard: X870E Nova (3.15 BIOS) and using PCIe x16 5.0 (tried 4.0, still the same thing)

PSU: NZXT C 1500W

Windows 11 latest build.

Edit:

576.02 - no fix.

576.26 Hotfix Driver - no fix.

[user9DZs0mqzrh]

I'm having this same issue with an a2000 ada edition 😕

[altaccanon]

Same issue, switching from DP to HDMI has helped the frequency of disconnects but still getting some now after a few days of no issues. Event Viewer during the disconnects shows the display as “surprise removed as it has been reported missing on the bus” under Kernel-PnP. Interestingly the first few disconnects after switching to HDMI didn’t have that specific error log.

[userF7TKLrr902]

Can we please get someone from Samsung to reply and acknowledge this issue, and get a fix worked on? It's infuriating that this has still not been adressed.

Thanks in advance!

[Wallaceb2y]

New Nvidia Driver 576.80 fixes this issue!

Edit...Sike

[userF7TKLrr902]

It does not. I wish it would, but it doesn't. That DP 1.4 related change has no effect on this particular issue.

[Byogore]

Try HDMI. I swapped to it and it's all gone now. I'll revisit DP in a month or two after more drivers and see if they've fixed it.

[userF7TKLrr902]

Thanks for the tip, but I know HDMI is working. But there is only one HDMI port on the 5090 FE and most AiB models except Asus ones. But i have two Neo G8's. And frankly swapping to another input is not fixing the issue, its working around it.

Much like having to turn the monitors on and keeping the on screen menu open in order to be able to see the post screen, Bios and safe mode also is a workaround and not a fix.

Samsung needs to adress this.

[Byogore]

Yeah it is embarrassing. This has been going on since the release of the 5090. I've reported it multiple times to the NVIDIA Bug Report link. Shouldn't be hard for people of their skill level to fix this in no time.

I would prefer to use the DisplayPort as well.