ASRock Z590 Phantom 4 AC 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=19520
Printed Date: 24 Jul 2025 at 10:22am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: ASRock Z590 Phantom 4 AC PCIe£
Posted By: The_Nephilim
Subject: ASRock Z590 Phantom 4 AC PCIe£
Date Posted: 07 Sep 2021 at 1:19pm
Hello everybody,
I have a question and I was wondering am I oversaturating my PCIe Lanes? I have a ASROck Phantom 4 AC Motherboard with 2 M.2 Drives with a PCIe sound blaster and a PCIe USB Card..
I also have a 1080GTX in the Top slot PICex16.. I want to not I am using the 2nd and 3rd slot on the M.2 Device as I am using a 10xxx series CPU and I am unable to use the top slot which I read is connected to the CPU but that is another issue..
Am I OK on my GPU and not taking needed lanes for the GPU, I have read it should be good even at 8x but I was wondering if having 2 M.2 drives and 3 slots in the PCIe taken up if that is affecting performance in any way?
I also was wondering why the top M.2 Slot does not work without using a 11xxx series CPU? Kinda sucks I am limited to only the 2 lower slots as I wanted the M.2 Drive to be linked to the CPU or is the regualr M.2 Slot fine for a M.2 Drive speed wise or someting?
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Replies:
Posted By: ASRock_TSD
Date Posted: 07 Sep 2021 at 7:43pm
Hi The_Nephilim,
Thank you for your post.
M.2_2 and M.2_3 will not affect your GPU performance, because they are connected to the Z590 chipset and the GPU is connected directly to the CPU.
About the M.2_1, due to it connects directly to the CPU, its function depends on the CPU. On the Intel 11th CPU, it can provide PCIEx16 (for GPU) + PCIEx4 (for M.2). But on the Intel 10th CPU, it can only provide PCIEx16 (for GPU). This is the reason why the M.2_1 will not able to use when you install the Intel 10th CPU.
All the best
ASRock TSD
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Posted By: The_Nephilim
Date Posted: 08 Sep 2021 at 9:37am
OK then is the 1st M.2 Slot supposed to work with a 10xxx series CPU at all. I ask because I put my SSD the Samsung 980 Pro there and it was not recognised in bios, so I basically am unable to use the 1st M.2 slot.
but from everything I read it should work but at PCIex3 speeds but it dont work at all.
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