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dmcybe
Adept III

My xfx rx 6700 xt is stuck at running pcie 3.0 x8 speed

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I have asus crosshair VI hero wifi x370. when i use my 6700 xt with it. it's lock to pice 3.0 x8 and i had a 5700 xt that ran at pcie 3.0 x16 speeds. i have ryzen 9 3900X cpu i know the MB can only do pcie 3.0 but is there a way to fix the issue im having. i have no m.2 drive. i only have one other pcie card sound blaster z that runs at 1x. i have try taking out the sound card and move my sata drives to different sata ports nothing is working. im running windows 11 pro

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dmcybe
Adept III

Re: My xfx rx 6700 xt is stuck at running pcie 3.0 x8 speed

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i found the problem it was the card it self there was traces on the pcie  that had been cut or not making contact on the card  so it wasnt getting the full 16x lanes. contact amazon to send me a replacement one.

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18 Replies
ThunderBeaver
Miniboss

Re: My xfx rx 6700 xt is stuck at running pcie 3.0 x8 speed

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It's gotta be in your BIOS PCIE peripheral settings under your BIOS advanced control features.

Or you need to update your BIOS to support your new hardware.

I'm running an MSI X370 M7 ACK MOBO which has 3 PCIE x 16 slots.

I'm running the latest BIOS for my board with an RX 6900 XT and I get all 16 pipelines.

Also ensure there are no hardware in your secondary/discrete PCIE slot as this will cause your MOBO to think your trying to run crossfire and default set your Primary GPU slot to the 8 x configuration.

I've heard of some people having this same issue running a WIFI card or other hardware in the PCIE x 1 slot just above the main PCIE x 16 slot if thats the case just shift the hardware to other slots that may fix your issue.

Good luck we will provide further assistance when called upon. 

dmcybe
Adept III

Re: My xfx rx 6700 xt is stuck at running pcie 3.0 x8 speed

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i have try disabling the built in wifi card it cant be move to different slot but i also use the BT that comes with it. and it stay stuck at 8x when i do im running the latest bios on my MB and have done a clear cmos both ways the cmos button and removing the battery. i could try reflashing the bios or use a older bios that was not windows 11 ready bios by default. i did a reflashing  of the bios and no changes in the bios is still reporting the card running at 8x i have sound card plug in at the last pcie 1x slot and gpu is on the first pice x16 slot i have disable the built in sound card and wifi card. still no change i think it has to do with my asus MB

Geforsikus_2021
Challenger

Re: My xfx rx 6700 xt is stuck at running pcie 3.0 x8 speed

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And when you give the load to the video card, for example, fullmark, or better gpu-z, and from the right of the bus interface a question mark and the start of the render test, does the second value in the same window, next to the question mark, change? Watch this video mb will help https://www.youtube.com/watch?v=wD0OEDEqjfE

dmcybe
Adept III

Re: My xfx rx 6700 xt is stuck at running pcie 3.0 x8 speed

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Screenshot 2022-01-26 061410.pngScreenshot 2022-01-26 061451.png

Geforsikus_2021
Challenger

Re: My xfx rx 6700 xt is stuck at running pcie 3.0 x8 speed

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Try to pull out the video card and wipe the contacts on the video card with an eraser (eraser), and insert it again, only carefully.(do not break the key that locks the video card in the slot. disconnect all the paraphyria from the motherboard except for the mouse, keyboard and monitor, and headphones, probably, and check if there will be a result.

elstaci
MVP

Re: My xfx rx 6700 xt is stuck at running pcie 3.0 x8 speed

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Another User recently opened a thread about the same issue that his GPU card was running at PCIe x16 x8 instead of PCIe x16 x16

Turns out that he had another PCIe Card installed on the second PCIex16 slot on his motherboard thus cutting in half the PCIex`16 slots bandwidth from x16 to x8 in the first slot.

Your Asus Motherboard has three PCIe x16 slots. But most likely the first 2 slots are connected in the respect if you have two PCIe cards installed in the first two PCIex16 slots it will automatically cut the bandwidth from x16 to x8 on each slot.

 

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dmcybe
Adept III

Re: My xfx rx 6700 xt is stuck at running pcie 3.0 x8 speed

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It didn't help pulling out the soundcard i have. It's not in any of the pcie x16 slots. 

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blenderhead1
Adept I

Re: My xfx rx 6700 xt is stuck at running pcie 3.0 x8 speed

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blenderhead1_0-1643207239008.png

your card is in the top x16 slot?

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dmcybe
Adept III

Re: My xfx rx 6700 xt is stuck at running pcie 3.0 x8 speed

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20220126_095157.jpg20220126_095205.jpgyes its in the top x16 slot

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