AMD Motherboards - GPU is running at x8 instead of x16 in top PCIe

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GPU is running at x8 instead of x16 in top PCIe

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=17302
Printed Date: 22 Dec 2024 at 2:19pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: GPU is running at x8 instead of x16 in top PCIe

Posted By: lordhollow64
Subject: GPU is running at x8 instead of x16 in top PCIe
Date Posted: 22 Nov 2020 at 4:20am

Hi. I've posted about this and I haven't found a solution yet.

My GPU is at PCIe x8, rather than PCIe x16 and I'm trying to fix it.
I looked at the hardware, and it's definitely slotted into the x16 PCIe slot. Could it something else that's messing with this? Like a SATA device or something?
I do plan on getting a new GPU very soon, but for now I wanna make sure that nothing on my motherboard is defective.

I'm hoping it's something in my BIOS that could use tweaking or adjusting.

I've re-seated the GPU, cleaned the contacts with isotropic alcohol, nothing. I'm afraid something may be defective, and I'm hoping it isn't the motherboard because I wanna upgrade my GPU soon. I wanna say there's a setting in the BIOS (which I updated today) but there isn't anything in there.

Could it be my SATA setup?? Or perhaps that M.2 WD NAND SSD I have?

I really need help here.

My build:

CPU
Ryzen 7 3700X @ 3.6 Ghz

RAM
Corsair Vengeance LPX 16 Gb @ 3200 Mhz (XMP enabled)

Motherboard
AsRock Taichi X570

GPU
XFX Radeon R9 390X

Storage
931GB Western Digital WDC WD10EZRZ-00HTKB0 (SATA)
465GB Samsung SSD 850 EVO 500GB (SATA (SSD)
931GB Western Digital WDC WD10EZEX-00BN5A0 (SATA)
931GB Western Digital WDC WD10EZRZ-00HTKB0 (SATA)
465GB Western Digital WDC WDS500G2B0B (SATA (SSD)

Replies:

Posted By: lordhollow64
Date Posted: 22 Nov 2020 at 6:37am

Please help me with this. I'm afraid my motherboard may be defective.

Posted By: ThreeDee
Date Posted: 22 Nov 2020 at 11:25pm

older link, but still applicable

https://graphicscardhub.com/gpu-pcie-running-x8/#:~:text=Check%20if%20CPU%2C%20GPU%20%26%20Motherboard%20supports%20PCIe%20x16&text=On%20the%20other%20hand%2C%20if,run%20at%20PCIe%20x8%20only.

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|Ryzen 5 5900|ASRock X570 Taichi-BIOS 4.60|2x16GB HyperX Predator RGB 3200@3600 1:1 IF|ASRock RX 6700XT|2 x PCIe 4.0 M.2 Drives for OS & Games|850 WTT Seasonic 80+ Titanium PSU|Noctua NH-D15|

Posted By: lordhollow64
Date Posted: 24 Nov 2020 at 4:17am

Yeah I looked at this but I don't know what to configure/look at in my BIOS that would control those things.

I'm afraid that either my GPU or motherboard are defective. Please help me with this I'm so alone here.

Posted By: ThreeDee
Date Posted: 24 Nov 2020 at 11:08am

Posted By: lordhollow64
Date Posted: 11 Dec 2020 at 6:07pm

There's only 3 slots and there's not enough space in my case to insert the GPU. I don't think that's the issue, though since the x16 slot is always supposed to be the top one, or the one closest to the CPU, right?

I have a bunch of SATA devices and even an M.2 NAND drive in the M.2 slot above the GPU, but I don't think that's the issue. Could it be something else or would it be my graphics card? I don't know what I have that would be taking up that bunch bandwidth if not for my storage devices.

Here's a Speccy

Posted By: lordhollow64
Date Posted: 11 Dec 2020 at 6:09pm

[URL= ]https://imgur.com/gallery/WscO4nK[/URL]

Posted By: ThreeDee
Date Posted: 12 Dec 2020 at 10:25am

Posted By: ThreeDee
Date Posted: 12 Dec 2020 at 10:25am

Posted By: lordhollow64
Date Posted: 12 Dec 2020 at 10:29am

I've done that already. I also re-seated my graphics card.

My GPU is old. Could there be something wrong with that component?

Posted By: ThreeDee
Date Posted: 12 Dec 2020 at 10:48am

lordhollow64 wrote:

I've done that already. I also re-seated my graphics card.

My GPU is old. Could there be something wrong with that component?

it's possible .. either throw a different GPU onto your motherboard, or throw your GPU in another setup if you can and then see if it's showing up correctly..

The wonderful world of troubleshooting

Posted By: ThreeDee
Date Posted: 12 Dec 2020 at 10:50am

Posted By: lordhollow64
Date Posted: 12 Dec 2020 at 10:36pm

Here. It doesn't say much.

Posted By: jdillipl
Date Posted: 13 Dec 2020 at 4:20am

It does show that the bus interface is capable of at most PCIe x16 version 3.0, and currently running at x8 version 3.0. Your video card is probably a PCIe 3.0 card. If you hover your mouse cursor over the blue question mark to the right of the Bus Interface window, you should see something like "Launches a test to put some load on the card to verify PCI-Express slot configuration." Press the question mark and see what happens.

Jake

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Asrock X370 Killer SLI/ac, Amd Ryzen 7 1700, GSkill FlareX F4-2400C16D-32GFX, RaidMax Thunder V2 735W PS

Posted By: lordhollow64
Date Posted: 15 Dec 2020 at 9:02pm

It just goes over to 8.3.0

I'm aware that my card is capable of x16.

Do you think something is defective? Could it be my motherboard or my GPU? I don't really have another card or board to test it with.

Posted By: jdillipl
Date Posted: 16 Dec 2020 at 1:12am

So did you click on the blue question mark? A small render test should have popped up to put some load on the card.

Jake

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Asrock X370 Killer SLI/ac, Amd Ryzen 7 1700, GSkill FlareX F4-2400C16D-32GFX, RaidMax Thunder V2 735W PS