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+--- Thread: hit me like a bolt of lightning?!....most M1 Mac Thunderbolt ports don’t support USB 3.1 Gen 2.... (/showthread.php?tid=266158)
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Re: hit me like a bolt of lightning?!....most M1 Mac Thunderbolt ports don’t support USB 3.1 Gen 2.... - jdc - 04-18-2022
Tested my wifes base M1 mini 256 GB internal, almost 2800 MB/s RW. Just picked a random folder, since you cant choose the whole drive with Blackmagic.
connected my crucial X8, 1 TB prebuilt drive, RWs never got below 800 MBs, never above 850 MB/s.
Sabrent TBolt gets 2200 write/2600 read -- plus/minus 50 MBs
Re: hit me like a bolt of lightning?!....most M1 Mac Thunderbolt ports don’t support USB 3.1 Gen 2.... - anonymouse1 - 04-19-2022
Yeah, I think Eclectic Light messed up on this--he's confusing the SATA speed cap with an imagined Mac speed cap. Basically he's saying, "Why won't this SATA drive give me more than 650 MB/s, which is the fastest SATA can go?????"
Re: hit me like a bolt of lightning?!....most M1 Mac Thunderbolt ports don’t support USB 3.1 Gen 2.... - Tiangou - 04-19-2022
anonymouse1 wrote:
Yeah, I think Eclectic Light messed up on this--he's confusing the SATA speed cap with an imagined Mac speed cap. Basically he's saying, "Why won't this SATA drive give me more than 650 MB/s, which is the fastest SATA can go?????"
Comparable results from tests kindly performed by markelp showed that an Inateck SATA RAID SSD and SanDisk Extreme Portable also connected at 5 Gb/s and returned comparable read and write rates of less than 390 MB/s and write of less than 418 MB/s. However, a Sabrent+Samsung NVMe conforming to USB 3.2 was found to connect at 10 Gb/s, and returned a read rate of 911 MB/s and write of 973 MB/s....
USB 3.1 Gen 2 storage connected direct to a Thunderbolt port on an M1 Mac was limited to 5 Gb/s, giving read rates of about 400 MB/s and write rates of about 430 MB/s.
...USB 3.2 storage connected direct to a Thunderbolt port on an M1 Mac operated at 10 Gb/s, with read and write rates of about 910 and 970 MB/s.
That's not a SATA bridge problem.
Re: hit me like a bolt of lightning?!....most M1 Mac Thunderbolt ports don’t support USB 3.1 Gen 2.... - anonymouse1 - 04-20-2022
Update-IMHO, he wrote a truly confusing article. He seems to be complaining that (a) MAC USB speeds are a bit lower on M1 than on Intel (which I may agree with), and (b) that Mac USB speeds on M! are inconsistent, and so © Apple is doing something wrong.
He may be right, but it just doesn't strike me as big deal--if you need top speed, you use Thunderbolt.
Re: hit me like a bolt of lightning?!....most M1 Mac Thunderbolt ports don’t support USB 3.1 Gen 2.... - Tiangou - 04-20-2022
anonymouse1 wrote:
Update-IMHO, he wrote a truly confusing article. He seems to be complaining that (a) MAC USB speeds are a bit lower on M1 than on Intel (which I may agree with), and (b) that Mac USB speeds on M! are inconsistent, and so © Apple is doing something wrong.
He's saying that you only get half-speed from a certain class of USB devices when connected to M1 Macs vs Intel Macs, with the exception of two of the 8 USB ports on the Mac Studio.