https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 08 Apr 2026 21:09:35 +0000 Tue, 15 Oct 2019 02:22:42 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=12640 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=12640&PID=68957&title=x99-taichi-pcie-bifurcation#68957 Author: shadowmustic
Subject: 12640
Posted: 15 Oct 2019 at 2:22am

That is unfortunate but understandable if it is a limitation of the platform.

The problem would still be that the BIOS on my board doesn't even have the option for x8/x8 which should at least allow 2/3 drives to be visible.]]> Tue, 15 Oct 2019 02:22:42 +0000 https://forum.asrock.com/forum_posts.asp?TID=12640&PID=68957&title=x99-taichi-pcie-bifurcation#68957 https://forum.asrock.com/forum_posts.asp?TID=12640&PID=68927&title=x99-taichi-pcie-bifurcation#68927 Author: badbri
Subject: 12640
Posted: 14 Oct 2019 at 3:23am

from Asrock_TSD "About PCI-E bifurcation, Intel 300 series only supports x16 to x8x8. Four x4 only support at HEDT like x299 chipset."

So NO you cannot do 4x/4x/4x/4x with x99 chipset and is why only one drive is seen. If the adapter did 8x/8x then it might work.]]> Mon, 14 Oct 2019 03:23:54 +0000 https://forum.asrock.com/forum_posts.asp?TID=12640&PID=68927&title=x99-taichi-pcie-bifurcation#68927 https://forum.asrock.com/forum_posts.asp?TID=12640&PID=68836&title=x99-taichi-pcie-bifurcation#68836 Author: shadowmustic
Subject: 12640
Posted: 11 Oct 2019 at 8:12am

Hello,

I recently upgraded to 2 new NVMe drives that are working well. The previous drives still work fine for other use cases, so I got a PCI-E NVMe expansion card, but it can only access 1 of the drives.

Forum research suggests that this is because the card would need 4X/4X/4X/4X PCI-E bifurcation to see the drives individually. Is it possible to enable this? If so, is there a BIOS version available for the X99 Taichi that supports PCI-E bifurcation?]]> Fri, 11 Oct 2019 08:12:45 +0000 https://forum.asrock.com/forum_posts.asp?TID=12640&PID=68836&title=x99-taichi-pcie-bifurcation#68836