Z370 Taichi PCIe
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=7565
Printed Date: 16 Jul 2025 at 12:08am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Z370 Taichi PCIe
Posted By: Animalm4st3r
Subject: Z370 Taichi PCIe
Date Posted: 04 Feb 2018 at 8:43am
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" rel="nofollow - Hello folks a new problem occured: CPU: i5-8600k GPU: RX 480 8GB M.2 Drive in the M.2_3 problem is my Graphics card only uses 8x instead of 16x lanes. is my M.2 using up lanes of the Graphics Card? |
Replies:
Posted By: wardog
Date Posted: 04 Feb 2018 at 2:38pm
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M.2_3 is only shared with SATA3_3 https://www.asrock.com/MB/Intel/Z370%20Taichi/index.asp#Specification" rel="nofollow - https://www.asrock.com/MB/Intel/Z370%20Taichi/index.asp#Specification If M2_3 is occupied by a SATA-type M.2 device, SATA3_3 will be disabled. This doesn't bode well for you! https://ark.intel.com/products/126685/Intel-Core-i5-8600K-Processor-9M-Cache-up-to-4_30-GHz" rel="nofollow - https://ark.intel.com/products/126685/Intel-Core-i5-8600K-Processor-9M-Cache-up-to-4_30-GHz Max # of PCI Express Lanes - 16 |
Posted By: Animalm4st3r
Date Posted: 04 Feb 2018 at 6:48pm
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well then i will just live with that because its just a loss of 1% power overall. It maybe some sort of compatibility issue becaue when i first installed windows i almost had to force feed the driver into windows over some shady tricks because the PC always crashed during a normal driver install.. |
Posted By: wardog
Date Posted: 04 Feb 2018 at 11:57pm
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But it's not a compatibility issue. It's a math issue. Your 8600K has 16 lanes. 4 are used with the M2 drive and 8 are used/left for the RX480. |
Posted By: wardog
Date Posted: 05 Feb 2018 at 12:00am
If you want to tinker, pull the M2 drive and in its place do a cheap install of Windows. My guess is by freeing up those 4 M2 lanes your RX480 will be running x16. |
wardog wrote:Posted By: Animalm4st3r
Date Posted: 05 Feb 2018 at 3:08am
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well i just tried pulling the m.2 it stays at 8x I think i will just live with it as it is not a big deal and everything is running smooth and stable Was just curious because it was nowhere mentioned in the manual that this m.2 is using up lanes from the GPU |
Posted By: wardog
Date Posted: 05 Feb 2018 at 3:31am
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Just pulled it? Or did you remember to reset the BIOS after also? I'm not pushing you, k? Just trying to help. |
Posted By: wardog
Date Posted: 05 Feb 2018 at 3:34am
The M2 doesn't "use' lanes from the GPU, that I can tell. Your CPU provides 16 lanes. What with 4 being used up via the M2 installed, that leave 12 free. Unfortunately there is no Spec for PCIe x12, so 8 it is . |
Posted By: Animalm4st3r
Date Posted: 05 Feb 2018 at 4:03am
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Well Pulled the GPU and M.2 Cleared CMOS. Installed GPU. Still only 8x. Right now i have no second system around for further crosstesting |
Posted By: Animalm4st3r
Date Posted: 08 Sep 2018 at 2:34am
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Just dug out this old thread if someone else comes along with the same issue. Wardog was right. |
Posted By: puma99dk|
Date Posted: 08 Sep 2018 at 9:10pm
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The CPU it self has 16 PCI-E lanes wired to the graphics that why if you use the 2x16 slots they will run at 2x8 PCI-E. The Z370 chipset have 24 PCI-E lanes, I have the same board and I use a i7-8086K it does have 16 PCI-E Lanes to directly for Grapchis and I use a Samsung 960 EVO 250GB M.2. and my GTX 1080 Ti on this board with bios P3.10 runs x16 3.0 without any issues and under no load it runs x16 1.1.  ------------- CPU: Intel Core i7-8086K MOBO: AsRock Z370 Taichi GFX: Nvidia GeForce GTX 1080 Ti Hybrid OS/Win10 Pro: Samsung SSD 960 EVO 250GB Storage: WDC Gold 1TB, RED 2x4TB, Purple 1x4GB PSU: Corsair SF600 |