Z390 Taichi PCI-E Lanes
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=19591
Printed Date: 19 Jul 2025 at 8:04pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Z390 Taichi PCI-E Lanes
Posted By: Animalm4st3r
Subject: Z390 Taichi PCI-E Lanes
Date Posted: 20 Sep 2021 at 4:24am
Okay AsRock help me out here.
You dont have a chipset for NVME and use the CPU PCI-E Lanes for the NVME drives.
Right now im using 2 NVME Drives and 5 SATA Storage drives.
So why is my GPU only running on 4 Lanes and not 8 when Intels specsheet states it should split the lanes as follows
1x16 or 2x8 or 1x8+2x4
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Replies:
Posted By: ASRock_TSD
Date Posted: 28 Sep 2021 at 6:19pm
Hi Animalm4st3r,
Thank you for your post.
In general, the M.2/SATA storage you connected to Z390 Taichi will not affect the PCIe Lanes of your GPU.
We recommend following the below setup to install your device.
PCIE2: GPU
M.2_1: nvme drive
M.2_2: nvme drive
SATA3_2, SATA3_4~5: SATA devices
SATA3_A1~A2: SATA devices
All the best
ASRock TSD
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Posted By: keithkb
Date Posted: 13 Mar 2024 at 7:00pm
I'm having a similar issue. My configuration is as follows:
PCIE1: Network card
PCIE2: GPU
PCIE4: HBA
M.2_1: nvme drive
M.2_2: nvme drive
M.2_3: nvme drive
Everything work flawlessly until I install the GPU. Once the GPU is installed, the HBA gets disabled. The manual says that the configuration above should run at x8/x8 but it doesn't seem to. It also says that the M.2 slots do not share lanes with the PCIE slots.
Is there a way to manually set the PCIE slots to 8 lanes?
Any other ideas why this configuration would not be working?
P.S. I have tried all the usuals, multiple HBA cards, multiple GPUs, swapping slots, swaping PSUs, etc.
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