Question RTX 4090 not running in PCIE 4.0

[Wizerbwski]

Hi all,

I have just finished building my rig. Specs:

Ryzen 7950x
MSI Z670E Carbon WiFi
32 Corsair DDR5
RTX 4090
1200W ATX 3.0 PSU
Corsair Elite 150i AIO cooler
2x KC3000 M.2 in first two gen 5.0 slots on MB (non RAID)

GPUZ is reporting GPU is only running @ PCIE X16 1.1 - this is even the case when running games and using the GPUZ mini benchmark

I have:
Changed BIOS settings from Auto to GEN 4
Removed and reseated the GPU

Drivers are new along with windows.

How can I get the GPU running at its full potential of PCI X16 4.0?

Any help appreciated.

 

[kanewolf]

Hi all,

I have just finished building my rig. Specs:

Ryzen 7950x
MSI Z670E Carbon WiFi
32 Corsair DDR5
RTX 4090
1200W ATX 3.0 PSU
Corsair Elite 150i AIO cooler
2x KC3000 M.2 in first two gen 5.0 slots on MB (non RAID)

GPUZ is reporting GPU is only running @ PCIE X16 1.1 - this is even the case when running games and using the GPUZ mini benchmark

I have:
Changed BIOS settings from Auto to GEN 4
Removed and reseated the GPU

Drivers are new along with windows.

How can I get the GPU running at its full potential of PCI X16 4.0?

Any help appreciated.

Do you have the latest version of GPU-Z?
Is your performance on-par with benchmarks you have found?

It may just be an error with GPU-Z and the new motherboard.

 

[Wizerbwski]

I have installed GPUZ today so I'm assuming it must be the latest version, it's not asking me to update anyway. However, it does see the CPU graphics running at PCIE x16 4.0.

I would say performance is less than all the benchmarks out there. 70-80 FPS in Cyberpunk maxed out 1440P

 

[Tzigone]

I think this is an AM5 issue, so MSI needs to update the bios here. You could contact their support as well to check.

Gigabyte just released a bios with this in the logs

1. Fix NVIDIA Geforce RTX 4090 PCIe down speed issue (SMU 84.79)

Part of the pain with early adoption, bios not always there.

 

[Wizerbwski]

Just an update.
I have updated to the latest bios (which was just a security update apparently?)
Set PCIE to 4.0 (again)
Reseated the GPU (again)

And now I'm getting 4.0 under load.

Weird....

Thanks for the help though

 

[Soupladel]

Can i just clarify, the 70-80fps for Cyberpunk, is that what you are getting or expecting to get?

I am getting an average 80FPS running the benchmark and maxed out at 1440p with DLSS disabled, you have me wondering if thats an underperformance now

 

[Zerk2012]

I have installed GPUZ today so I'm assuming it must be the latest version, it's not asking me to update anyway. However, it does see the CPU graphics running at PCIE x16 4.0.

I would say performance is less than all the benchmarks out there. 70-80 FPS in Cyberpunk maxed out 1440P

That looks normal to me if you have DLSS off. EDIT. I seen some of his settings were on high not ultra.

View: https://www.youtube.com/watch?v=pLtDcdE4BRE

 

[Roland Of Gilead]

Just an update.
I have updated to the latest bios (which was just a security update apparently?)
Set PCIE to 4.0 (again)
Reseated the GPU (again)

And now I'm getting 4.0 under load.

Weird....

Thanks for the help though

Not reallt weird. This is par for the course. You've a new system (new CPU tech, new GPU, and new mobo/bios ecosystem). This normal. Be sure to clear CMOS after each bios update.

Update your bios, system drivers and GPU drivers regularly to keep bugs at a minimum.

New Agesa updates will be coming out probably weekly for a little while as they bugfix everything. Early adopter issues.