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9070 XT - 2x HDMI high refresh displays (144 and 120 Hz) not working

King Mustard said:
I sent him all he needed a few days ago via a Private Message :)

As you said, hopefully the Radeon team have an answer.

If they do not, I will have to go back to NVIDIA (and my RTX 3080 for now) as I cannot be doing with my second display being stuck at 60 Hz.
Click to expand...
Did you try the 120Hz option that I mentioned earlier? Sorry if you have and I've just missed it!
 
AMD_Vik said:
I believe we have a speculative fix going into today's optional driver. Will try to clarify. Please keep your eyes peeled.
Click to expand...
I have an issue with 2 high resolution, high refresh rate displays (one or both don't work) when connected to my 7900XT (using 2 HDMI ports), do you know if this fix will work for older cards too or just 9000 series?
 
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Beta 25.3.2:
  • Incorrect gamma is exhibited while playing Counter-Strike 2 and using MSAA x8 on Radeon RX 9070 series graphics products.
  • Intermittent application crash may be observed in Indiana Jones and the Great Circle when settings are set to "Very Ultra" quality and Path Tracing is enabled. Users experiencing this issue are recommended to use the default Ray Tracing settings as a temporary workaround.
  • 3rd party tools that rely on our ADL SDK for detecting ROPs count will incorrectly report 64 ROPs.
  • Lower than expected performance may be observed while playing Assetto Corsa Competizione on Radeon RX 9000 series graphics products.
  • Intermittent system or application crash may be observed while pressing Alt-Tab during gameplay on some AMD Radeon Graphics Products such as the Radeon RX 6000 Series.
  • Intermittent system or application crash may be observed while using multiple high refresh rate (+120 Hz) monitors with HDMI connections.
  • Windows Update may overwrite the installed AMD Software: Adrenalin Edition with an older version of the graphics driver on Radeon RX 9000 series graphics products
Unfortunately no improvement at all on my end.
 
I have the Sapphire Pulse and I'm using my Samsung 4K TV as monitor, it can do 4@144hz or 120hz, the only issue I experience is the screen goes black(no signal) when I start some applications for a few seconds, like the browser...I did a few gaming marathons and no issue at all it never switched the screen black when playing a game. No issues with my RTX 3080 previously, I did do a DDU in safe mode, before installing AMD driver. Because it's minor it's not worth the effort of me wiping my machine.
 
King Mustard said:
Beta 25.3.2:
  • Incorrect gamma is exhibited while playing Counter-Strike 2 and using MSAA x8 on Radeon RX 9070 series graphics products.
  • Intermittent application crash may be observed in Indiana Jones and the Great Circle when settings are set to "Very Ultra" quality and Path Tracing is enabled. Users experiencing this issue are recommended to use the default Ray Tracing settings as a temporary workaround.
  • 3rd party tools that rely on our ADL SDK for detecting ROPs count will incorrectly report 64 ROPs.
  • Lower than expected performance may be observed while playing Assetto Corsa Competizione on Radeon RX 9000 series graphics products.
  • Intermittent system or application crash may be observed while pressing Alt-Tab during gameplay on some AMD Radeon Graphics Products such as the Radeon RX 6000 Series.
  • Intermittent system or application crash may be observed while using multiple high refresh rate (+120 Hz) monitors with HDMI connections.
  • Windows Update may overwrite the installed AMD Software: Adrenalin Edition with an older version of the graphics driver on Radeon RX 9000 series graphics products
Unfortunately no improvement at all on my end.
Click to expand...
To clarify, is this with the adapter, dual HDMI or both scenarios?
 
King Mustard said:
Both, unfortunately. I saw no difference.
Click to expand...
Interesting, so dual, HDMI is still causing a TDR? Does this require specific display modes to be set? Can one be set to a HDMI 2.1 standard of display bandwidth, and another work at a lower rate? We've tested the adapter cable you're presently using internally. Our display eng team aren't happy with its performance, I gather it's not to spec. I'll see if they can recommend another.
 
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AMD_Vik said:
Interesting, so dual, HDMI is still causing a TDR? Does this require specific display modes to be set? Can one be set to a HDMI 2.1 standard of display bandwidth, and another work at a lower rate? We've tested the adapter cable you're presently using internally. Our display eng team aren't happy with its performance, I gather it's not to spec. I'll see if they can recommend another.
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Dual HDMI is indeed still causing the same driver timeouts.

I tried the first HDMI TV (LG C4) being plugged in alone and running at 60 Hz before plugging the second (LC C2) in and I believe the second TV will work at 60 Hz (it was a few weeks ago that I last tried) but as soon as I increase the first TV to 140 Hz (or 120 Hz), the second monitor starts to have the same issues.

I updated the adapter's firmware a few months ago (possibly December or January) but apparently their firmware article was updated on March 17, 2025, so I downloaded the update tool again, which said it had updated the device to 7.02.126. The tool did not state was the previous version was.

It appears I can now run the second display (LG C2) at 4K120 10 bpc, as long as the Pixel Format is:
  • YCbCr 4.2.0
  • YCbCr 4.2.2
It will not work at 4K120 8 bpc or 10 bpc:
  • RGB 4:4:4 Studio (Limited RGB)
  • RGB 4:4:4 PC Standard (Full RGB)
 
We're working to stabilise dual HDMI usage, though due to a HW limitation, this connectivity will not provide the best experience; the second HDMI will have its resolution reduced below pixel clock of 600 MHz (ex. 4K60 444 / 4K120 420 max resolution).

We've identified a bit of a limitation on the dongle side; the most reliable maximum resolution that it can achieve is limited to 6G 4 lanes (anything above will result in black screen), which means that 4K120 444 will not be achievable in this configuration. Would recommend to use verified DP to HDMI 2.1 (PCON) dongles to achieve the largest range of gaming resolutions including 4K120 444. One of example is the Club3D CAC-1335
 
AMD_Vik said:
We're working to stabilise dual HDMI usage, though due to a HW limitation, this connectivity will not provide the best experience; the second HDMI will have its resolution reduced below pixel clock of 600 MHz (ex. 4K60 444 / 4K120 420 max resolution).

We've identified a bit of a limitation on the dongle side; the most reliable maximum resolution that it can achieve is limited to 6G 4 lanes (anything above will result in black screen), which means that 4K120 444 will not be achievable in this configuration. Would recommend to use verified DP to HDMI 2.1 (PCON) dongles to achieve the largest range of gaming resolutions including 4K120 444. One of example is the Club3D CAC-1335
Click to expand...
When you say hardware limitation in the first paragraph, are you talking about a limitation with the graphics card hardware or the dongle hardware?

Also do you know of any quality adaptors that work the other way around (e.g. from DP source to HDMI output) as it's hard to tell which ones are quality? Also if I didn't have to take out a loan to afford it would be swell! :cry:
 
Ohhh crap. This doesnt sound good.

I'm currently trying to get my new 9070XT up and running in a new build and seeing issues that may be related.
I have 4 devices connected (2 all the time, and 2 are turned on when needed)


1. 3440x1440 120Hz via DP
2. 1920x1080 120Hz via HDMI (would be OK with this only being 60Hz)
3. Valve Index via DP @ 144Hz
4. 3440x1440 120Hz custom res into a 4k projector via HDMI

Please tell me should be able to drive these displays with RX9070xt
 
ArrBee said:
Ohhh crap. This doesnt sound good.

I'm currently trying to get my new 9070XT up and running in a new build and seeing issues that may be related.
I have 4 devices connected (2 all the time, and 2 are turned on when needed)


1. 3440x1440 120Hz via DP
2. 1920x1080 120Hz via HDMI (would be OK with this only being 60Hz)
3. Valve Index via DP @ 144Hz
4. 3440x1440 120Hz custom res into a 4k projector via HDMI

Please tell me should be able to drive these displays with RX9070xt
Click to expand...
I do not have an answer, but do you have any onboard?
Because to me your 2. looks like the kind of thing which I would drive with onboard. I'm on AM4 currently so no onboard, I have run both onboard and a GPU in the past and even though the onboard was Intel and the GPU AMD it all worked fine. (Seem to recall Nvidia not playing that nice with the Intel onboard though.)
For me the main reason was and would be that using onboard allows the main GPU to stay with lower memory and core clocks and hence use less power when "idle".
 
KompuKare said:
I do not have an answer, but do you have any onboard?
Because to me your 2. looks like the kind of thing which I would drive with onboard. I'm on AM4 currently so no onboard, I have run both onboard and a GPU in the past and even though the onboard was Intel and the GPU AMD it all worked fine. (Seem to recall Nvidia not playing that nice with the Intel onboard though.)
For me the main reason was and would be that using onboard allows the main GPU to stay with lower memory and core clocks and hence use less power when "idle".
Click to expand...

Thanks, that's a good suggestion to try. I'm not sure how well it will work, or if it will save power though.
It's worth a go and may even allow me to connect a 5th output! (Ideally, I'd like to feed another 4k 120hz to the AVR which then outputs to a 2nd hdmi on the projector)

One thing I did fix yesterday is the primary display was only allowing 100hz instead of 120hz.
Took ages to figure out that when I selected 120hz on windows it was picking up there custom res I created for the projector which wasn't compatible with the monitor for some reason.

Now the only thing left to fix for this card is there is no sound to the valve index and no sound device for it on windows....
And then hopefully when I add a custom resolution back it won't cause issues.


I see what people mean about Nvidia "just working".
This is my first AMD GPU and the performance is good but the integration has been..... Interesting.
 
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