![]() Inquiring minds might ask, “why aren’t the read speeds affected?” It can then deliver the full PCIe data bandwidth potential to an attached external drive. When a Thunderbolt display is connected to an M1 Mac’s TB4 port, the other Thunderbolt 4 port on the Mac does not need to support video output. Our theory to what causes this dramatic speed increase is that the M1 CPU only supports one video output signal to its TB4 ports. Subsequent testing on an M1 MacBook Pro and MacBook Air revealed the same speed increase. To double-confirm having a Thunderbolt display attached to an M1 Mac mini creates this speed boost, Brady performed the same test with another Thunderbolt 3-equipped display and found the same increase. When Brady switched the displays, the faster speeds followed the Thunderbolt display. Through the process of elimination, the only variable was that one of the minis was connected to a Thunderbolt 3-equipped display while the other mini was connected to a non-Thunderbolt display via HDMI. As both minis should write to the same external drive at the same speed, Brady began investigating what could cause this anomaly. When connected to a 2TB OWC Envoy Pro EX, Brady found one of the minis wrote to the Envoy Pro EX at much higher speeds. One of our product dev team members, Brady Campbell, came across this while running some tests between two M1 Mac minis. You can get up to 67% FASTER write speed from a Thunderbolt-equipped external drive connected to a Thunderbolt port on an M1 Mac when you ALSO have a Thunderbolt display connected directly to the second Thunderbolt port on your M1 Mac. Well, we have some breaking news on this subject and you’re reading it here first on the Rocketyard Blog: It’s been widely covered in posts and videos how external drive performance is unacceptably slow with the M1 Macs. ![]() From performance benchmarking to inform you of your “best-bang-for-the-buck” OWC upgrade to determining which Macs can have double the amount of RAM than what the factory supports, you can count on OWC to be your trusted source for key insights. Our product development team is constantly taking a deeper look at Apple products-and our own-to see if we can uncover some hidden potential to help you get more from your technology investment. Testing products is a way of life here at OWC and has been nearly from day one. Read on, because we found something interesting… And as you might suspect, OWC has a Thunderbolt Hub shipping soon for $149.Not getting the write speeds you were expecting with an external drive on your M1 Mac? You’re not alone. 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. Standing also notes that the M1-based Macs have Thunderbolt 4, which differs from Apple’s implementation of Thunderbolt 3 in only one fundamental way: Thunderbolt 4 adds support for Thunderbolt hubs that let you add more ports. If you plug two fast drives into ports that share a bus, performance suffers. By comparison, each pair of Thunderbolt ports on the Intel-based Macs share a bus, meaning that they also share bandwidth. 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. ![]() Over at the OWC Rocket Yard blog, SoftRAID developer Tim Standing shares a welcome discovery about Apple’s new M1-based Macs. Thunderbolt Improvements in the M1-Based Macs ![]() #1612: OS suggestions, new accessibility features, higher cellular prices, Chrome OS Flex for old Macs, Memorial Day hiatus.#1613: M2 MacBook Air and 13-inch MacBook Pro, long-awaited features coming to OS, watchOS 9, TidBITS website changes, tvOS and HomePod update.#1614: 2022 OS system requirements, WWDC 2022 head-scratcher features, travel tech notes from Canada.#1615: Why Stage Manager needs an M1 iPad, Limit IP Address Tracking problems, Citibank cryptocurrency confusion.#1616: Explaining passkeys, Apple challenges for senior citizens, macOS 11.6.7 Big Sur fixes email attachment bug.
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