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Info New M1 Macs dedicated Thunderbolt bus for each port

KeithP

Diamond Member
Jun 15, 2000
5,633
179
106
I just saw this story over on Tidbits, apparently each Thunderbolt port on the M1 Macs has their own controller.

System Report indicates that there are two Thunderbolt buses, one for each of the Thunderbolt ports!! This means that each port has its own dedicated bus and doesn’t have to share its bandwidth with any other port. Each one will have 2,800 MB/sec all to itself.
The author does a test to confirm this is the case. Good news for users with Thunderbolt devices.

-KeithP
 
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mnewsham

Lifer
Oct 2, 2010
14,476
397
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Lack of eGPU support certainly dampens things a bit, but good news for anyone wanting 10Gbps ethernet + high-speed DAS.
 

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