i need help changing pcie slot x16 but im only using x4

[kaxelo02]

i need help changing pcie slot x16 but im only using x4 i tried slot changes from bios i saw lots of posts about this but still cant get to change it if i restart pc it changes from x1 to x4 somtimes x8

 

[purecain]

Your bios is selecting different profiles. Go into BIOS and set the PCIE speeds manually. PCIE 4 x8 is equivalent to PCIE 3 x16 and would be a more desirable setting.

 

[Youseethis]

What’s the system? (Mainly the cpu, the motherboard and the bios version). How many nvme ssds are connected? Any other pcie devices?

 

[Blue4130]

i need help changing pcie slot x16 but im only using x4 i tried slot changes from bios i saw lots of posts about this but still cant get to change it if i restart pc it changes from x1 to x4 somtimes x8

Click the question mark next to the link speed and run the stress test, does the lane count jump to x16?

 

[Jtuck9]

I had to flick a switch on this ASUS motherboard to get it to recognise gen 5 speeds. Not sure if your motherboard has a similar feature and something similar is at play?! Something like this:

ASUS ROG Z790 Motherboards - PCIe Alternate Mode Switch

If you are experiencing performance issues with your NVMe drives (e.g. low write performance), please ensure that the Alteration PCIe Mode switch is set to its default state. This switch on your motherboard allows you to toggle the PCIe signal between Gen4 and Gen3 to help with debugging. If the...

rog-forum.asus.com

 

[kaxelo02]

for cpu i have i7 12700k and as for bios version i dont remember but when i go to into bios and see pcie speeds m 2 speeds and this pcie speeds there is gens from 1 to 5

 

[kaxelo02]

What’s the system? (Mainly the cpu, the motherboard and the bios version). How many nvme ssds are connected? Any other pcie devices?

just one ssd m2 rtx 3070ti gpu thats it

 

[Youseethis]

So the link width changes on reboot and it’s on an intel system. (Amd had a bios bug at some point). Remove the card, clean the contacts carefully, blow some air on the pcie slot (not with your mouth or “canned air”. Use a blower but don’t let any fans spin.) Install the card again and check if it’s fully inserted. Support the card if you haven't in order to prevent sagging. Then test again.

 

[BlueBee]

What motherboard do you have? You can grab this information by clicking on search (bottom left), type in System Information (when it comes up click run as administrator).
There you should see most things like motherboard make/model and BIOS version/date.

Have you tried setting the BIOS to gen 4 or 5 instead of Auto?

 

[de.das.dude]

i need help changing pcie slot x16 but im only using x4 i tried slot changes from bios i saw lots of posts about this but still cant get to change it if i restart pc it changes from x1 to x4 somtimes x8 View attachment 403098

this could just be a power saving issue. press the ? beside and see if it ramps up.

 

[kaxelo02]

What motherboard do you have? You can grab this information by clicking on search (bottom left), type in System Information (when it comes up click run as administrator).
There you should see most things like motherboard make/model and BIOS version/date.

Have you tried setting the BIOS to gen 4 or 5 instead of Auto?

i did try it all gen 3-4-5 but still does not work bios version

and motherboard

 

[kaxelo02]

this could just be a power saving issue. press the ? beside and see if it ramps up.

nah still on 4.4.0 thats it

 

[kaxelo02]

Click the question mark next to the link speed and run the stress test, does the lane count jump to x16?

View attachment 403324

nah nothing changes

 

[BlueBee]

This chap solved a similar issue by reseating the GPU

D

Thread '3090 is running @ 4x PCIe on Asus Z690 motherboard'

Jul 11, 2022

I am unsure how long this has been like this but I just noticed my 3090 is running @ 4x. I built this PC in January and did not notice this until now as I was adding in a USB PCIe card that was not being detected and trying to figure this out.

My PC consists of ASUS Z690 Plus D4 wifi motherboard
12700k
EVGA 3090 FTW3 Ultra installed in the X16 Gen5 slot(top slot)
1000w EVGA Plat PSU
2TB M2 NVME SSD in the M2_1 slot

After noticing this I did a Timespy bench and my GPU benched as it did when I built it, which makes me believe my 3090 has been running like this the whole time.

Its showing...

• Darge82
• Replies: 7
• Forum: Graphics Cards

• 
• 

 

[R-T-B]

this could just be a power saving issue. press the ? beside and see if it ramps up.

Power saving never reduces the lane count, only pcie spec version.

This chap solved a similar issue by reseating the GPU

D

Thread '3090 is running @ 4x PCIe on Asus Z690 motherboard'

Jul 11, 2022

I am unsure how long this has been like this but I just noticed my 3090 is running @ 4x. I built this PC in January and did not notice this until now as I was adding in a USB PCIe card that was not being detected and trying to figure this out.

My PC consists of ASUS Z690 Plus D4 wifi motherboard
12700k
EVGA 3090 FTW3 Ultra installed in the X16 Gen5 slot(top slot)
1000w EVGA Plat PSU
2TB M2 NVME SSD in the M2_1 slot

After noticing this I did a Timespy bench and my GPU benched as it did when I built it, which makes me believe my 3090 has been running like this the whole time.

Its showing...

• Darge82
• Replies: 7
• Forum: Graphics Cards

• 
• 

Unless slot is incorrect this is the proper next step.

 

[agent_x007]

If you have pull card out, make sure contacts inside slot are clean (and there are no dust/hair inside it).
You can clean PCIe port pads on card itself with ISO (just in case).
Check, and double check all passive components on PCB that are between PCIe slot and GPU (if it's possible without card disassemble).

PCI-e lane drops on desktop cards is NEVER caused by lack of load on GPU.