5090 FE PCIe Issue Need Help!

[Zigwig]

Hi guys. I have an issue, possibly with my 5090 FE. The issue:

- I am running a water cooled system, the 5090 FE is in a waterblock
- I keep getting code 99 on my x870e Nova as it’s booting. It indicates a Super IO initialization error with something in the PC.
- I’ve unplugged every USB device and slowly added them back on but narrowed it down to the GPU.
- It boots fine if the GPU is unplugged and I boot on integrated graphics
- I took my card out cleaned the pcie connector and slot. Put it back in and worked for hours, I gamed and worked no issues. Powered down, tried powering up again and it went back to getting stuck at code 99.
- It is on a riser cable this might be the issue. I forced Gen4 didn’t make a difference.
- It’s weird, every 10 to 20 boots, 1 boot will get me to desktop and PC will work fine through the GPU
- In Minidump files they showed 2 errors such as: 0x116 VIDEO_TDR_FAILURE error and 0x50 PAGE_FAULT_IN_NONPAGED_AREA

Only possible remaining solutions I can think of troubleshooting (waiting for soft tubing to arrive to sort as running acrylic tubes):

- Plug GPU directly in the PCIe slot: riser cable broken if it works consistently (soft tubes needed, I don’t to bend another acrylic tube for a while lol)
- If top did not then plug riser into lower PCIe slot to check if top one is busted
- Ask NVIDIA if I can buy a replacement PCIe connector, that may be the bit that is failing
- If solution above worked or didn’t work a new motherboard and verify that motherboard itself was not compromised PCIe (although I feel this one is highly unlikely)
- Something gone wrong with my GPU, RMA with Nvidia (but it does not explain that it can work for hours and then not initialise properly on following boot)

Sorry if this was a long one, but don’t want to spend more if I can resolve. If any has had any issue like this, some tips would help

 

[keenan]

I would rule out the pcie riser before anything else. Seems like the most logical culprit.

Why not just drain the loop, disconnect the pump, remove the riser, connect the GPU directly to the pcie slot and see if it boots?

 

[Zigwig]

I would rule out the pcie riser before anything else. Seems like the most logical culprit.

Why not just drain the loop, disconnect the pump, remove the riser, connect the GPU directly to the pcie slot and see if it boots?

You mean as in check if it posts without attaching it or CPU to any form of tubing?

 

[keenan]

You mean as in check if it posts without attaching it or CPU to any form of tubing?

Exactly.

Both CPU and GPU can handle powering up with just waterblocks connected.

 

[Tetras]

What PCIE gen are you using in the BIOS? A quick 'fix' would be to set PCI-E 4.0 or 3.0, since it is common with risers that they don't like newer PCI-E gens. This would be easy to test compared to the other options.

- Ask NVIDIA if I can buy a replacement PCIe connector, that may be the bit that is failing

Let's hope not, 'cos I'd imagine it very unlikely nvidia would sell you one.

 

[Zigwig]

What PCIE gen are you using in the BIOS? A quick 'fix' would be to set PCI-E 4.0 or 3.0, since it is common with risers that they don't like newer PCI-E gens. This would be easy to test compared to the other options.


Let's hope not, 'cos I'd imagine it very unlikely nvidia would sell you one.

My riser is a Gen5 one. I switched to Gen4, no dice. To get ahead of things a bit I opened up a convo with NVIDIA. They basically said they can’t, they would just replace the whole thing.

Edit: Damn just seen the video, its sent me under lol. I hope this is not the case otherwise def an RMA case

 

[Marak]

Gen 4&5 PCIE have much stricter requirements on wire length if I recall. Try pcie 3 just to test if the riser is the issue as that's much more relaxed for riser use.

 

[Nemiyen]

That's some mad reballing / fixing skills on that 5090! Connectors and parts just keep on getting smaller and smaller!

 

[VincentHanna]

I don't know if this will help, as it's not the same issue I had, but try force enabling Spread Spectrum in the bios.

This solved the issue I had on a x870 motherboard, though it was an MSI Tomahawk.