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Nozgog

macrumors regular
Original poster
Oct 26, 2019
119
97
Has anyone had a chance to test the new M3 MacBook Pro/Max with a SSD that supports USB 3.2 Gen 2x2 (20Gbps)? What speeds are you getting?

Is the M3 generation MacBooks supporting 20Gbps via USB?

If so, can you recommend any enclosures?
 
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Nozgog

macrumors regular
Original poster
Oct 26, 2019
119
97
From all the information I gathered: M1 and even M2 Pro/Max MacBooks are limited to 10Gbps via USB
 
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singularity0993

macrumors regular
Oct 15, 2020
161
794
USB standards are a total mess. USB 3.2, USB 3.2 Gen2, USB 3.2 Gen2x2, USB 4 and now USB 4 v2. If you are looking for fast SSD enclosures, I suggest you look for ones with JHL7440 (Intel Thunderbolt 3) or ASM2464 (USB4) chips. Both support 40Gb/s on Mac.
 

akdj

macrumors 65816
Mar 10, 2008
1,190
89
62.88°N/-151.28°W
To answer your second question: yes. The Thunderbolt 4 ports support USB-4 speeds at up to 40Gb/s. Source: https://www.apple.com/macbook-pro/specs/

That’s been the case since M1. Thunderbolt 40Gb/s, USB-4 limited to 10Gb/s without a dongle or workaround


My issue with using the Thunderbolt NVMe enclosures are the sparsely populated options, off brands, and lack of the ‘big guys’; SanDisk, Lexus, Samsung etc making their own. Samsung has 980/90 Pros readily available. Why aren’t they making a 2,000-3,000 Mb/s external SSD for the folls who don’t want to goof around with the enclosure, which size NAND/NVMe stick etc?
I just bought the T-9 4TB akdj@mac.com $239. Seems a bargain but still handicapped speeds - I’d that the case still on the M3 Mac MacBook Pros?
 

gilby101

macrumors 68030
Mar 17, 2010
2,955
1,635
Tasmania

Nozgog

macrumors regular
Original poster
Oct 26, 2019
119
97
USB standards are a total mess. USB 3.2, USB 3.2 Gen2, USB 3.2 Gen2x2, USB 4 and now USB 4 v2. If you are looking for fast SSD enclosures, I suggest you look for ones with JHL7440 (Intel Thunderbolt 3) or ASM2464 (USB4) chips. Both support 40Gb/s on Mac.
Yes it seems new enclosures with ASM2464 are now popping up on Amazon - various „manufacturers“ selling the same looking design

Has anyone tried those yet?
 

fraXis

macrumors member
Jun 25, 2007
42
42

Fishrrman

macrumors Penryn
Feb 20, 2009
29,243
13,318
I believe the new MacBook Pros have USB4.
That should be good for 40GBps*, IF you have an enclosure and cable that will support it.
And of course -- an nvme DRIVE that will support it, as well...

* I'm going to GUESS that in the real world, maximum speeds will be more like 3,500MBps...
(I welcome correction by others)
 

Nozgog

macrumors regular
Original poster
Oct 26, 2019
119
97
These work pretty well...

This looks Thunderbolt only?

I have the Envoy Express and that won’t work with USB ports and because of PCIe 3 x2 the speed is good with around 1500 but nothing groundbreaking
 
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