AMD Motherboards - How to manually change pcie speed?

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How to manually change pcie speed?

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=11891
Printed Date: 08 Aug 2025 at 9:00pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: How to manually change pcie speed?

Posted By: FortyFour
Subject: How to manually change pcie speed?
Date Posted: 15 Jul 2019 at 10:53am

I use an AB350 Fatal1ty Gaming K4. With all the zen 2 whea errors lately, I want to set mine to 3.0. But I can't find where to change it. All I've found is a setting to change it from 1x16 or 2x8, and below that are options to change gen1, gen2 or auto, which I doubt is what I'm looking for. I'm using the bios 5.8, so it might be possible asrock deleted the feature for this iteration like they did with internet flash, etc.

Replies:

Posted By: MarvelousXT
Date Posted: 15 Jul 2019 at 6:24pm

If it doesn't have the option for 3.0 then the only way is to use the gen 2 instead. The bios is so bad that it got no option for gen 3.

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Posted By: cx5
Date Posted: 17 Jul 2019 at 4:15pm

FortyFour wrote:

I use an AB350 Fatal1ty Gaming K4. With all the zen 2 whea errors lately, I want to set mine to 3.0. But I can't find where to change it. All I've found is a setting to change it from 1x16 or 2x8, and below that are options to change gen1, gen2 or auto, which I doubt is what I'm looking for. I'm using the bios 5.8, so it might be possible asrock deleted the feature for this iteration like they did with internet flash, etc.

Do you mean this?

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x370taichi@3.50gen4
AX750 Optane900P SN770
3800x PosdonZro4 BarrowPWM-17w>420x140x28
XFX SWFT319 6900XT
MSI RX560 LP to get Fluid Motion BlueskyFRC 75hz

Posted By: cx5
Date Posted: 17 Jul 2019 at 4:18pm

While the gen 1, gen 2 and finally auto without the option for gen 3 is on this page.

Actually if we leave this at AUTO, does it mean my above picture showing gen-3 will be implemented?

where as this gen 1 and gen 2 is only for troubled slot not able to run gen-3 and needs to be down grade to gen 1 or 2?

may be I should go home change this to AUTO and try.

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x370taichi@3.50gen4
AX750 Optane900P SN770
3800x PosdonZro4 BarrowPWM-17w>420x140x28
XFX SWFT319 6900XT
MSI RX560 LP to get Fluid Motion BlueskyFRC 75hz

Posted By: kleyzer
Date Posted: 21 May 2021 at 9:48am

hello guys i have an asrock b450 and i don't find where i can change it to gen2, can you help me please