https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Thu, 16 Apr 2026 14:33:27 +0000 Tue, 04 Apr 2023 00:26:24 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=25693 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=25693&PID=104297&title=x670e-taichi-bifurcation-question#104297 Author: meekrophone
Subject: 25693
Posted: 04 Apr 2023 at 12:26am

Thanks for the explanation, appreciate it.]]> Tue, 04 Apr 2023 00:26:24 +0000 https://forum.asrock.com/forum_posts.asp?TID=25693&PID=104297&title=x670e-taichi-bifurcation-question#104297 https://forum.asrock.com/forum_posts.asp?TID=25693&PID=104293&title=x670e-taichi-bifurcation-question#104293 Author: eccential
Subject: 25693
Posted: 03 Apr 2023 at 6:13pm

Bifurcation of a slot only affects that slot.
8x4x4 means that the 16 lanes will be split into one 8x and two 4x lanes.
To make use of this, you need some form of an adapter, or a PCIe card with separate devices on board.

An adapter example is a 16x adapter that gives you two 8x slots.

A card example is a 16x card with four m.2 slots onboard, each using 4 lanes.
If you were to use such an adapter on a slot that does 8x4x4x, you won't be able to use all 4 m.2 slots because one of them won't be independent. You'll end up using m.2 slot 0 (using 4 lanes out of 8), and then slots 2 and 3 (4 lanes each). You won't be able to use slot 1 because that will be wired to second half of the 8 lanes that are not independent.
]]> Mon, 03 Apr 2023 18:13:12 +0000 https://forum.asrock.com/forum_posts.asp?TID=25693&PID=104293&title=x670e-taichi-bifurcation-question#104293 https://forum.asrock.com/forum_posts.asp?TID=25693&PID=104288&title=x670e-taichi-bifurcation-question#104288 Author: meekrophone
Subject: 25693
Posted: 03 Apr 2023 at 5:17am

Greetings,

planning on getting a Taichi. Need to know some detail about the bifurcation settings in the BIOS related to the PCIe slots. One of the settings is [8x4x4x].
- Does this setting mean that the whole first slot gets split up into 8x4x4x? (leading to a deactivated 2nd slot)
- Or does it mean the first slot becomes an 8x slot and the 2nd slot becomes as 4x4x slot?

Any info on this would be appreciated]]> Mon, 03 Apr 2023 05:17:02 +0000 https://forum.asrock.com/forum_posts.asp?TID=25693&PID=104288&title=x670e-taichi-bifurcation-question#104288