U.2 to m.2 adapter

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bootit

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Oct 18, 2018
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I was wondering why a u.2 adapter only feeds into 1 m.2 device. They support 8 lanes from a pcie 3.0 adapter to u.2? Is this more efficient or it runs as a 4 lane adapter? https://www.addonics.com/products/ad25m2u.2.php
Why I say this as this I am a storage newcomer and saw this pcie 3.0 16 to 4 x m.2
https://www.asus.com/au/Motherboard-Accessories/HYPER-M-2-X16-CARD/
I also believe this runs in raid 0 without any vroc keys or on 8 lane cpu
 
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I'm not sure I understand. Both U.2 and M.2 support up to x4 PCIe lanes, so it makes sense any adapter between them would be one to one.

You second link is for a x16 PCIe add in card. Those lanes are divided up into 4 M.2 connections, each of which is a PCIe x4 connection.

Edit: If you're referring to the add in card shown in the bottom picture of the 1st link, that's a x4 card.
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TJ Hooker

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I'm not sure I understand. Both U.2 and M.2 support up to x4 PCIe lanes, so it makes sense any adapter between them would be one to one.

You second link is for a x16 PCIe add in card. Those lanes are divided up into 4 M.2 connections, each of which is a PCIe x4 connection.

Edit: If you're referring to the add in card shown in the bottom picture of the 1st link, that's a x4 card.
 
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bootit

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Oct 18, 2018
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I found my error, PCI-Express and U.2 SSDs often offer server/professional performance while PCI-Express SSDs may even utilize eight lanes (U.2 uses up to four)! Thanks for pointing out U.2 has 4 lanes.
https://rog.asus.com/articles/hands-on/easy-guide-to-ssds-sata-msata-m-2-and-u-2/
 
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