Graphics Cards

[mi3zu69]

Hello everyone !

Anyone here using a Samsung Odyssey G9 with RX 6800 or 6800 XT and managed to make it work at 240 hz 10 bit ?

Monitor works at 240 hz in his menu but everytime i switch to 240 hz in windows from grafic card i get flashes artefacts and blank screen till it reverts.

Samsung G9 is updated to latest 1008.1 firmware and i use latest AMD drivers.

I didn't had a AMD grafic card since 7970 and i saw a fix was releassed for the same problem on rtx 3080/3090.

Thanks

[mi3zu69]

Anyone here using a RX 6800 series and Samsung Odyssey Monitor?

Mine and some other people i found on other forums dont work on 240 hz.It is a driver issue that needs to be adressed on DSC.

[mi3zu69]

Anyone? Help...

[mstfbsrn980]

Samsung Odyssey G9 firmware 1008.1 w/ support for 240Hz - 
You should update the firmware. Also, if the problem exists, you may contact the AMD support team... 
Online Service Request 

EDIT: I have not the monitor. This link is from the nVidia forum page. And same problem exists for nVidia.

[mi3zu69]

Hello and thank you for answer!

The latest firmware it is installed and it fixed Nvidia 240 hz problem for RTX 3000 series but not for AMD RX 6800 series. 

I have found same problem on other forums with Samaung G9 and 6800xt.

It is a driver issue i think. 

https://imgur.com/r/ultrawidemasterrace/5U1cHDW

[frostbite2600]

Same issue here, 240hz doesn't work on 6800XT but it did after a driver update on the 3080 to fix the DSC. 

[mi3zu69]

It was more than a driver update from Nvidia...The monitor needed a firmware update also wich was made in colaboration with NVIDIA.

I sold my AMD RX 6800 XT mainly because of this 240 hz problem ,knowing that AMD barely fixxes more serious issues,and the coil whine that developed after 1 week of use.I had the reference model.

I got a good price at a TUF 3080 OC and i dont regret it.

My monitor works without a problem since then.

[Nviron]

---

@mi3zu69 wrote:

Hello and thank you for answer!

The latest firmware it is installed and it fixed Nvidia 240 hz problem for RTX 3000 series but not for AMD RX 6800 series. 

I have found same problem on other forums with Samaung G9 and 6800xt.

It is a driver issue i think. 

https://imgur.com/r/ultrawidemasterrace/5U1cHDW

---

That link shows exactly what I see on my screen too when I switch to 240 hertz. I'm afraid I'm going to have to break my all red build and get a 3090 instead...

[frostbite2600]

I'm going to give AMD some time to get this sorted, since it took Nvidia a bit of time to fix this as well. I got my 3080 on release day and 240hz was broken until 10/20/2020 when they released the hot fix 456.98. Even then G-Sync was still broke, but 240hz was working at that point. 

Hopefully we'll hear something from AMD regarding the issue in the coming weeks. 

[mi3zu69]

Well i know that sucks to not use your monitor at 240 hz..I hope they will fix it soon.

I was pleased by 6800xt performance but on samsung odyssey g9 3080 give me abit better scores and feels smoother that 6800xt.

I wasnt able to use HDR also in many games because of that problem.

You have it also?

[frostbite2600]

Yeah, went from a ASUS TUF 3080 to the 6800xt. 3080 was better performance by a bit (5`-10%) but the ungodly amount of heat that my computer generated was extremely frustrating, so I switched to a 6800xt. I had to do a full Windows install to get the 6800xt to perform without any microstudder, I don't know if there was something else at play that was causing it but even after using DDU it was present. Installed a fresh copy of Windows and the 6800xt has been performing beautifully ever since. 

But yeah, I had to also use 120hz on my Odyssey G9 with my 3080 for the first month of ownership. I also have a 1660 Super that's in another PC that would work perfect with 240hz 5120x1440 so it was something specific in the driver for the 3000 series specifically. 

[mi3zu69]

I have no problem with heat inside at all,using a TUF 3080 with +150 on core and 500 mem i heavent seen it pass 64 degrees ever.

I use a TUF Gt 501 case with 3 x 120 mm fans intake and 1 noctua A14 in the back as exaust and Arctic Freezer Ii 360 on top as cpu cooling.

[Craig9080]

I just bought a 6900XT and I have the exact same problem outlined here. Has this officially been reported to AMD yet?

[frostbite2600]

They're aware of it, it's in the release notes of the drivers:

https://www.amd.com/en/support/kb/release-notes/rn-rad-win-20-12-2-rgb

• The Samsung™ Odyssey G9 C49G95T may experience display or corruption issues when set to 5120x1440@240hz.

[mi3zu69]

I just found 30 min ago a 6900xt at MSRP..i ll give it another shot to AMD specilay if they fix this.

[Craig9080]

Yeah, saw this when I was updating last night.  Glad they are tracking it. Since it took Nvidia, what, 45 days after acknowledging the problem I'm hopeful we will see something by MLK weekend. 

[frostbite2600]

AMD fixed the 240hz issue this morning with a driver update. I'm now able to run in 240hz as expected. Perfect!

Thanks AMD

[Dominik15]

No, the problem is not solved on the current 21.10.4 drivers either. I wrote here how to partially solve the problem.

https://community.amd.com/t5/drivers-software/samsung-odyssey-g9-49-quot-not-working-at-240-hz-with-...

[Dominik15]

The problem was finally solved after more than a year. The first correct drivers are 21.11.3 .

[Nviron]

I have the exact same problem with the rx6900 XT.

I'm using the 8K DP cable

I updated the drivers and the firmware for the monitor (1008)

Disabled freesync and made sure that the monitor is set to 240 HZ mode.

Still have black screen and artifacts/flickering when switching to 240 HZ in Windows.