Intel Motherboards - X299 Taichi XE PCIe Lane distribution

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X299 Taichi XE PCIe Lane distribution

Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=8927
Printed Date: 08 Aug 2025 at 4:00am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: X299 Taichi XE PCIe Lane distribution

Posted By: simplyfabio
Subject: X299 Taichi XE PCIe Lane distribution
Date Posted: 13 Jun 2018 at 8:35pm

" rel="nofollow - Good morning guys,

It's a pleasure to be part of this forum!

I would like to move on a X299 platform using the X299 Taichi XE, but because I have special setup requirements, I've few questions:

Could you explain the PCIe lane distribution with a 44 Lane CPU? I would like to have this configuration:

2x TITAN V in full 16x mode, with NO SLI

1 Samsung 970 Pro M.2 using x4 CPU lane for the O.S.

1 Intel 900p PCIe x4 using x4 CPU lane for caching video, etc.

The Thunderbolt AIC Card using whatever, PCH or CPU lane.

Is it possible with this motherboards?

Thanks a lot for any reply!

Replies:

Posted By: ASRock_TSD
Date Posted: 15 Jun 2018 at 10:40am

Dear Simplyfabio,

Thank you for contacting us.

X299 Taichi XE has 4 PCI-E 3.0 x16 slots, when 44 lanes CPU installed, PCI-E x16 slots will run at ?�two x16, one x8??or ?�one x16, three x8??

https://www.asrock.com/mb/Intel/X299%20Taichi%20XE/index.asp#Specification" rel="nofollow - https://www.asrock.com/mb/Intel/X299%20Taichi%20XE/index.asp#Specification

If you want to use two PCI-E slots at x16 mode, there will be only one more x8 slot can be used.

ASRock X299 OC Formula has 5 PCI-E 3.0 x16 slots and one PCI-E 3.0 x4 slot.

When 44 lanes CPU installed, PCI-E slots can support at two x16, one x8, and one x4 mode.

https://www.asrock.com/mb/Intel/X299%20OC%20Formula/index.asp#Specification" rel="nofollow - https://www.asrock.com/mb/Intel/X299%20OC%20Formula/index.asp#Specification

Thank you!

Yours truly,

ASRock TSD