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Astral 5090 OC Dead on Arrival (DOA) or incompatible with WRX90E-SAGE

AlexeyC
Level 7

‎05-16-2025 08:45 AM

I've blown a fortune and built a new system which includes the following ASUS components:

  • ROG-ASTRAL-RTX5090-O32G-GAMING
  • Pro WS WRX90E-SAGE SE - R1.02
  • ROG-THOR-1600T3

Upon power-on - lights turn on, fans are spinning, but there is no display output.

Through gradual elimination, I've narrowed the problem down to the GPU.

I have confirmed that the rest of the systems seems to work fine by connecting a monitor to the motherboard's BMC VGA.

Through a lot of trial and error, I discovered that if I boot into the BIOS Safe Mode I can sometimes get display output from GPU ~50% of the time. After more than a week of trying different things I may have gotten display output only once on a normal boot.

I did notice that the motherboard's PCIe Q-Release Slim latch doesn't seem to click when inserted. The GPU is resting flush with the motherboard NVMe heatsinks, without any clearance, so can't be pushed in any further. There are no PCIe pins exposed or antything like that, it does seem to sit fully inside the slot, just can't get the latch to click in - which seems to be a mechanical failure. But I don't know if it's the root cause.

Already tried the following troubleshooting:

  • No OS installed, so not relevant.
  • All storage devices removed.
  • Memtest fully passed.
  • Tried all 7 PCIe slots.
  • Tried all 3 DisplayPort outputs.
  • Tried with case horizontally and vertically hoping gravity could help with any lose contacts.
  • Verified that all power plugs are fully inserted in GPU, PSU and motherboard.
  • Verified DisplayPort cable is fully inserted into both GPU and monitor.
  • Upgraded motherboard BIOS to the latest v0901 2025/03/28
  • Tried Loading BIOS Defaults.
  • Tried resetting CMOS.

I'm pretty much out of options now.

Has anyone been able to get this card to work with WRX90E-SAGE?

Or has anyone encountered similar problems?

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4 REPLIES 4

AlexeyC
Level 7

‎05-18-2025 11:37 AM

Tried an old known-good GPU in the this motherboard - same issue!

Tried HDMI instead of DisplayPort - all GPUs are working now!

So DisplayPort on GPUs does not work on WRX90E-SAGE?

I don't understand how this can be.

Am I missing something?

Does anyone know what is going on here, or seen this before?

Is there any way to get DisplayPort working on GPUs inserted into this motherboard?

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Silent_Scone
Super Moderator

‎05-18-2025 11:49 AM

Hi @AlexeyC 

Use iGPU to post, set PCIE_16X to GEN 4.0 and retest.

9800X3D / 6400 CAS 28 / ROG X870 Crosshair / TUF RTX 4090
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AlexeyC
Level 7

a month ago

So far nothing I tried worked.

I have finally tracked the problem down to Monitor (LG 34WK95U-W with DisplayPort v1.4) going to sleep. The chain of events looks something like this:

  1. PC is powered on and monitor wakes up.
  2. The motherboard takes a while to POST.
  3. The monitor says there's no signal on DisplayPort and goes to sleep.
  4. The motherboard finishes POST and initialises the GPU to display the BIOS POST screen.
  5. GPU wakes up while the monitor is sleeping and decides there's no monitor connected.
  6. The screen stays dark.
  7. If an OS boots with GPU drivers installed it may wake the monitor up eventually.

A manual workaround is to keep the monitor awake by playing with its menu until motherboard finishes POST, then the GPU detects it and displays the BIOS POST screen as expected.

I haven't found a way to prevent this from happening without manual intervention.

Unfortunately on this monitor HDMI does not have enough bandwidth to display native 5K2K resolution so it has to be either DIsplayPort or DisplayPort Alternate Mode tunneled over Thunderbolt/USB-C.

I'm awaiting delivery of Samsung G95NC monitor next week. Really hope that this problem doesn't affect it. If it does - at least it has no such limitations and can pull native 8K2K@240Hz resolution over either DisplayPort or HDMI.

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AlexeyC
Level 7
In response to AlexeyC

3 weeks ago

Samsung G95NC monitor works with both DisplayPort and HDMI.

So to summarise, on this Pro WS WRX90E-SAGE SE - R1.02 motherboard, regardless of which GPU card is installed...

LG 34WK95U-W monitor:

  • HDMI - works.
  • DisplayPort v1.4 - does not work until OS boots up and loads graphics drivers (not great if you haven't installed the OS yet).

Samsung G95NC monitor:

  • HDMI - works.
  • DisplayPort v2.0 - works.
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