Paul,
Interesting. Thank you. Have you yet come to any conclusions regarding the 
improvement of the M1 MBA over your previous one? Chalk & cheese? Similar to 
what you were hoping/expecting?
I have a 2017 MBA and have been wondering, being tempted,  what the new M1 MBAs 
are really like,
Cheers, Nick

> On 3 Dec 2020, at 10:41, 'Paul R Owen' via Sussex Mac User Group 
> <[email protected]> wrote:
> 
> This may be useful to someone.
> 
> The difference between Thunderbolt 3 ports on M1 macs and earlier models.
> 
> Story (with image of device) available here: 
> https://tidbits.com/2020/12/02/thunderbolt-improvements-in-the-m1-based-macs/ 
> <https://tidbits.com/2020/12/02/thunderbolt-improvements-in-the-m1-based-macs/>
>  
> 
> Thunderbolt Improvements in the M1-Based Macs 
> <https://mailer.tidbits.com/l/hXWTpT6FK9WfKlm763R28R763w/yZ892ZsGUBUWzKULfHpf25Xg/VRPGF6w8MQteyAJn8O3hqg>
> Over at the OWC Rocket Yard blog, SoftRAID developer Tim Standing shares a 
> welcome discovery about Apple’s new M1-based Macs 
> <https://mailer.tidbits.com/l/hXWTpT6FK9WfKlm763R28R763w/fm5MrsjoTTQDVmHDOphKKQ/VRPGF6w8MQteyAJn8O3hqg>.
>  Although the new Macs have only two Thunderbolt ports, compared to four on 
> the Intel-based 13-inch MacBook Pro and Mac mini, Standing discovered that 
> each port has its own Thunderbolt bus. By comparison, each pair of 
> Thunderbolt ports on the Intel-based Macs share a bus, meaning that they also 
> share bandwidth. If you plug two fast drives into ports that share a bus, 
> performance suffers. Standing also notes that the M1-based Macs support 
> Thunderbolt 4, which differs from Apple’s implementation of Thunderbolt 3 in 
> only one fundamental way: it offers support for Thunderbolt hubs that let you 
> add more ports.
> 
> So yes, the M1-based Macs may have only two Thunderbolt ports, but they’ll 
> both provide full bandwidth and allow users to add more ports through a hub. 
> And as you might suspect, OWC has a Thunderbolt Hub 
> <https://mailer.tidbits.com/l/hXWTpT6FK9WfKlm763R28R763w/uts7637R2aiofzZ3G9ZlL5Lg/VRPGF6w8MQteyAJn8O3hqg>
>  shipping soon for $149. 
> <https://mailer.tidbits.com/l/hXWTpT6FK9WfKlm763R28R763w/6WSqemSv4ErndIHRK30r4Q/VRPGF6w8MQteyAJn8O3hqg>
> 
> Paul Owen
> 
> 
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