Question Gigabyte RX 9070 XT Gaming OC is not POSTing to BIOS ?

[rattlehead_]

The issue is in the title, recently bought the GPU to replace my existing RTX 3080 (working properly in the same system). Current specs are:

• Motherboard: B550M Aorus Elite rev 1.0 (Latest BIOS installed - F20g, Mar 11, 2025)
• CPU: Ryzen 7 5800X
• PSU: MSI A1000G PCIE5

Booting up the PC gives me the GPU fan spin and the RGB lighting of the Gigabyte logo, but no signal on the monitor (using DP cable). Also with it the PC can only be turned off via a long press of the power button. Things I've tried and failed with the same result:

• Resetting the CMOS battery
• Disabling CSM support in BIOS
• Forcing PCIe Gen 3 / Gen 4 in BIOS
• Taking out one RAM stick
• Powering the GPU via
  • 12VHPWR->double 6+2, 8pin->single 6+2 (as recommended on the PSU's official website)
  • 8pin->double 6+2, 8pin->single 6+2
  • 12VHPWR->single 6+2, 8pin->single 6+2, 8pin->single 6+2

Both the GPU and the PSU are brand new (and the local retailer whom I bought the GPU from already returned it back to me after my RMA request saying they checked it and it's perfectly fine). Don't know what to try at this point... Does anyone here have any suggestions?

 

[Lutfij]

Welcome to the forums, newcomer!

Forcing PCIe Gen 3 / Gen 4 in BIOS
How are you able to do this when you can't get the system to POST/get into BIOS?

If you yet have the RTX3080 GPU, drop that back in, make sure you're on the latest chipset driver(manually reinstall the chipset driver in an elevated command) then use DDU to remove all GPU drivers(intel, Nvidia and AMD) in Safe Mode. Replace the GPUs and then see if the issue persists.

Can you get the GPU to work on the lowest most slot? Speaking of slots, what sort of storage drives are you working with?

Both the GPU and the PSU are brand new
What PSU were you on while on the RTX3080?

 

[rattlehead_]

Hello, and thanks for the reply I am able to get to BIOS via using my old GPU, so all BIOS adjustments have been performed by temporarily swapping the new GPU with RTX 3080. The only storage drive is M.2 SSD (SSD A-Data XPG SX8200 Pro 1TB). I have dualboot Win/Linux using systemd-boot (idk if that's important), on Windows I already uninstalled all GPU drivers via DDU and haven't been using it since then, but like I mentioned at the moment I can't even get to BIOS (let alone OS), so I'm not sure driver software makes a difference... Using the lower (PCIeX4) slot didn't seem to make a difference.

What PSU were you on while on the RTX3080?

Corsair RM850e

 

[rattlehead_]

P.S. Just confirmed the GPU itself is working fine in a different test bench (which also happens to be on B550M, except MSI)
P.P.S. Also tried setting Above 4G Decoding to enabled and Re-Size BAR to Auto in BIOS - no result

 

[rattlehead_]

Update: PC ended up booting to BIOS successfully after I removed my M.2 SSD... The problem is I obviously need it, is that a known compatibility issue? Do I need to look for a new SSD? If so, what should I look for in a new one?

 

[JayGau]

Update: PC ended up booting to BIOS successfully after I removed my M.2 SSD... The problem is I obviously need it, is that a known compatibility issue? Do I need to look for a new SSD? If so, what should I look for in a new one?

1 TB drives are very cheap nowadays. I would get a new one from a popular brand (WD, Samsung, Crucial) and clone your XPG to the new one (the problem is obviously not with Windows since you can't even reach the BIOS, so no need of a fresh install).

But before doing that, you could also use the 3080 to run a firmware update on your motherboard (they are applied with tools running on Windows, provided by the mobo manufacturers). That could help resolving a compatibility issue.

 

[dwd999]

Perhaps its not the m.2 drive but the dual boot software. Perhaps if its possible separate m.2 drives for each operating system using bios selection option to choose which to boot.

 

[rolli59]

You have two M.2 slots, have you tried the other one ?

https://www.gigabyte.com/Motherboard/B550M-AORUS-ELITE-rev-10-11-12/sp

 

[rattlehead_]

Yes, tried both slots, ended up buying a different ssd, worked with that one. This week I'm gonna try wiping the old one (using my old gpu to do so) and see if it posts with both installed. But it seems to be a repeat of this: https://forums.tomshardware.com/thr...9070-and-motherboards-dram-led-is-on.3879145/ except with XT now (and an SSD from a different brand). Whatever weird compatibility issue it is, if someone knows a solution, would love to get that extra TB though.