No signal with new GPU.

[Thinder]

Hi! I've been building a brand new system, here are my specs old and LAST:
MSI MEG X570S ACE MAX.
AMD Ryzen 7 5800X 3D.
EVGA NVIDIA GeForce GTX 1080 Ti 11GB.
Sapphire Radeon RX 7900 XTX Nitro+ Vapor-X 24GB GDDR6
32 GB G.SKILL TridentZ RGB Series 32GB (4 x 8GB) RAM Cl14 DDR4 3600.
SAMSUNG 870 EVO Series 2.5" 2TB SATA III V-NAND Internal Solid State Drive (SSD).
SAMSUNG SSD 970 EVO Plus 500GB.
SPCC Solid State Disk 223GB.
Thrustmaster HOTAS WARTHOG.
TWCS Throttle.
PICO 4 256GB.

My brand new GPU, a Sapphire Radeon RX 7900 XTX Nitro+ Vapor-X 24GB GDDR6 fail to produce any signals. I took it to CEX Wembley where a friend working as a tester had it working without any problem.
We thought my system was undervolted with a Corsair RM850X, so I replaced it by a Corsair RM1000X, still no signals, using the same HDMI connection, I even tried an adapter DVI to HDMI which works with my EVGA GEFORCE GTX 1080Ti but still no results.
Cabling have been checked (3 X PCIE connectors) and works with the 1080Ti. I have no clue what causes this problem, for all I know it could be the BIOS or/and support issue with the motherboard.
CMOS was flashed several times over using a jumper since the battery is quasy inaccessible, half hidden by some sort of cooling device I can't identify because it doesn't show in the manual.
Tickets have been written to MSI, AMD, Sapphire and card seller supports, so far, Corsair and Sapphire have replied but we know now that it is not a voltage issue and that the card is working just fine on a test bench.
Any suggestion?
Thanks in advance.

[jonsky7]

With the 7900 plugged in does the computer still boot up? Can you get into the BIOS with that card plugged in, or is the screen always blank?

If it's always blank, does the motherboard show a code on it's little LCD display?

Which monitor are you using?

Edited January 20, 2023 by jonsky7

[jonsky7]

Got the latest BIOS installed for the motherboard?

https://www.msi.com/Motherboard/MEG-X570S-ACE-MAX/support#bios

[Thinder]

3 hours ago, jonsky7 said:

Got the latest BIOS installed for the motherboard?

https://www.msi.com/Motherboard/MEG-X570S-ACE-MAX/support#bios

Thanks for your reply.

I finally resolved the issue by installing the GPU on the PCI_2E slot and it booted straight away the PCI_1E might be faulty.

I will now install the proper driver for it in safe mode, the drawback is I lost the front USB connection because the card is too thick to fit in the slot without pushing the connector down and risking to damage it and/or the slot but I have plenty more in the back, this motherboard is clearly not designed to take cards of this size.

My BIOS was the latest version but I chose to revert to the last without the "Change the default setting of Secure Boot" introduced from 7D50v14 because it could have been at the root of the problem if it actually lowered the amount of power available at boot.

Also the fan which was previously under the card sits now down the bottom of the case blowing upward, I have a thinner one (10mm difference with standard fans) just in front/above it and will order another one to position it on the lower fan position, I guess cooling will be even better.

That's about it really. System seems stable so far...

Again, thank you for trying to help. Fly safe.

 

Edited January 20, 2023 by Thinder

[jonsky7]

I did see a warning in the manual about these heavy cards and PCIE slots. I'd definitely be trying to RMA it if I was you if it is new enough.
I think I also noticed that only the top slot is PCIx16, and the 2nd is PCIx8. I may be wrong about this.
Not sure if the bandwidth will be limited at 8x anyway.

[BitMaster]

wow wow wow..

If your old card does STILL work in x16 mode in Slot-1 but your new one doesn't but works in another PC in x16 and also in x8 in your own #2 slot then something with the Bios is wrong,

either mobo or graphics-board need a new Bios if I get this right because it all works, just not in that mix.

..and yes, you roughly loose 2-5% on any x8 mode, v3 or v4.

my 2 cents

[Thinder]

46 minutes ago, jonsky7 said:

I did see a warning in the manual about these heavy cards and PCIE slots. I'd definitely be trying to RMA it if I was you if it is new enough.
I think I also noticed that only the top slot is PCIx16, and the 2nd is PCIx8. I may be wrong about this.
Not sure if the bandwidth will be limited at 8x anyway.

No, you're absolutely right.

I spent hours trying to get this PCI_E1 slot to work after a friend of mine working at CEX Wembley tested the card, I knew it was OK.

I just ran the first test if you want to have a look, I was laughing when I saw the results.

Sapphire Radeon RX 7900 XTX Nitro+ Vapor-X 24GB GDDR6 first run.

[SkateZilla]

You would need a BIOS Update to run PCIe-16 w/ that card.

You may also need to reset cmos to clear settings of the previous GPU

[Thinder]

My BIOS was updated, the latest 7D50v15, reason why I reverted to one which didn't have the "Change the default setting of Secure Boot" introduced from 7D50v14 because it could have been at the root of the problem if it actually lowered the amount of power available at boot.

Apparently, from MSI forum topics, it seems that the motherboard has some issues with the PCI_E1, that's how I did find the suggestion of running the card from PCI_2.

I have done all of those things, clear CMOS, then installed the AMD drivers in safe mode using DDU, there is little more I can do until MSI sort it out.

I'm recharging my PICO4 then I'll have a test flight in DCS, my settings were already nearly all maxed out, obviously my FPS wasn't fantastic with the 1080Ti but now I have set MSAA to 4 and pixel density to 1.6. I'll test those settings when the PICO battery is full.