![Tests show Thunderbolt ports on M1 Macs don't fully support USB 3.1 Gen 2 speeds: Digital Photography Review Tests show Thunderbolt ports on M1 Macs don't fully support USB 3.1 Gen 2 speeds: Digital Photography Review](https://www.dpreview.com/files/p/articles/8848595577/CleanShot_2021-10-18_at_14.38.50_2x.jpeg)
Tests show Thunderbolt ports on M1 Macs don't fully support USB 3.1 Gen 2 speeds: Digital Photography Review
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8K USB C to DisplayPort Cable Thunderbolt 4 to DP1.4 Cable thunderbolt 3 displayport cable DP1.4 165Hz 240Hz Cable
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USB C to DisplayPort 1.4 8K Cable,AUBEAMTO 2M/6.6Ft Thunderbolt 4/3 to DisplayPort 4K@144Hz/120Hz 5K@60Hz 2K@240Hz HBR3 DP1.4 Adapter for 2021 MacBook Pro, M1 Mac Mini, Dell XPS - Newegg.com
![Apple's new 2021 MacBook Pro only comes with an HDMI 2.0 port which cannot output 4K at 120Hz on an external display - NotebookCheck.net News Apple's new 2021 MacBook Pro only comes with an HDMI 2.0 port which cannot output 4K at 120Hz on an external display - NotebookCheck.net News](https://www.notebookcheck.net/fileadmin/Notebooks/News/_nc3/Apple_MacBook_Pro_Display_HDMI_2.0_120Hz_4K.jpg)
Apple's new 2021 MacBook Pro only comes with an HDMI 2.0 port which cannot output 4K at 120Hz on an external display - NotebookCheck.net News
![4k 144hz is working! This is huge! It means that DisplayPort 1.4 dsc is finally online. This did not work with the regular m1, someone reported they couldn't drive their 5k display 4k 144hz is working! This is huge! It means that DisplayPort 1.4 dsc is finally online. This did not work with the regular m1, someone reported they couldn't drive their 5k display](https://preview.redd.it/td2b2ya8qrv71.jpg?width=640&crop=smart&auto=webp&s=8a649acd3f4c91b26de0f725cb6d36f35f024db6)
4k 144hz is working! This is huge! It means that DisplayPort 1.4 dsc is finally online. This did not work with the regular m1, someone reported they couldn't drive their 5k display
![USB C to DisplayPort 1.4, 8K Cable 1.8M/6Ft Thunderbolt 4/3 to DisplayPort 4K@60Hz 8K@60Hz HBR3 DP1.4 Adapter for MacBook Pro, M1 Mac Mini, Dell XPS - Walmart.com USB C to DisplayPort 1.4, 8K Cable 1.8M/6Ft Thunderbolt 4/3 to DisplayPort 4K@60Hz 8K@60Hz HBR3 DP1.4 Adapter for MacBook Pro, M1 Mac Mini, Dell XPS - Walmart.com](https://i5.walmartimages.com/asr/b1dd5546-432a-423b-be39-d7f0e512056c.402b0c5c10f198c405b44ad6a03c26fc.jpeg?odnHeight=2000&odnWidth=2000&odnBg=FFFFFF)
USB C to DisplayPort 1.4, 8K Cable 1.8M/6Ft Thunderbolt 4/3 to DisplayPort 4K@60Hz 8K@60Hz HBR3 DP1.4 Adapter for MacBook Pro, M1 Mac Mini, Dell XPS - Walmart.com
![Amazon.com: Dbilida VESA Certified 8K USB C to DisplayPort 1.4 Cable 3.3ft, Support 8K@60Hz, 4K@144Hz 165Hz, 2K@240Hz, [Thunderbolt 4/3 Compatible] 32.4Gbps for MacBook Pro M1 M2, Mac Studio, iMac, XPS : Electronics Amazon.com: Dbilida VESA Certified 8K USB C to DisplayPort 1.4 Cable 3.3ft, Support 8K@60Hz, 4K@144Hz 165Hz, 2K@240Hz, [Thunderbolt 4/3 Compatible] 32.4Gbps for MacBook Pro M1 M2, Mac Studio, iMac, XPS : Electronics](https://m.media-amazon.com/images/I/61qGZLSzWRL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Dbilida VESA Certified 8K USB C to DisplayPort 1.4 Cable 3.3ft, Support 8K@60Hz, 4K@144Hz 165Hz, 2K@240Hz, [Thunderbolt 4/3 Compatible] 32.4Gbps for MacBook Pro M1 M2, Mac Studio, iMac, XPS : Electronics
![USB C to DisplayPort 1.4 8K Cable Stouchi 4.58M/15Ft Thunderbolt 4/3 to DisplayPort 4K@144Hz/120Hz 5K@60Hz 2K@240Hz HBR3 DP1.4 Adapter for 2021 MacBook Pro, M1 Mac Mini, Dell XPS - Newegg.com USB C to DisplayPort 1.4 8K Cable Stouchi 4.58M/15Ft Thunderbolt 4/3 to DisplayPort 4K@144Hz/120Hz 5K@60Hz 2K@240Hz HBR3 DP1.4 Adapter for 2021 MacBook Pro, M1 Mac Mini, Dell XPS - Newegg.com](https://c1.neweggimages.com/productimage/nb640/AD8FS22072706WKIPED.jpg)
USB C to DisplayPort 1.4 8K Cable Stouchi 4.58M/15Ft Thunderbolt 4/3 to DisplayPort 4K@144Hz/120Hz 5K@60Hz 2K@240Hz HBR3 DP1.4 Adapter for 2021 MacBook Pro, M1 Mac Mini, Dell XPS - Newegg.com
![Amazon.com: PeoTRIOL USB C to DisplayPort 1.4 Cable, 8K 60Hz Type C to DP Cable, 4K@144Hz 120Hz, 2K@240Hz, 32.4Gbps 1.4 HBR3 Adapter Thunderbolt 4/3 MacBook Pro 2021, M1 Mac Mini, iPad Pro, Amazon.com: PeoTRIOL USB C to DisplayPort 1.4 Cable, 8K 60Hz Type C to DP Cable, 4K@144Hz 120Hz, 2K@240Hz, 32.4Gbps 1.4 HBR3 Adapter Thunderbolt 4/3 MacBook Pro 2021, M1 Mac Mini, iPad Pro,](https://m.media-amazon.com/images/I/61z4HhqzNcL.jpg)
Amazon.com: PeoTRIOL USB C to DisplayPort 1.4 Cable, 8K 60Hz Type C to DP Cable, 4K@144Hz 120Hz, 2K@240Hz, 32.4Gbps 1.4 HBR3 Adapter Thunderbolt 4/3 MacBook Pro 2021, M1 Mac Mini, iPad Pro,
![Amazon.com: Silkland USB C to DisplayPort 1.4 Cable [8K@60Hz, 4K@144Hz 120Hz, 2K@240Hz], 5K Type C to DP 1.4 Cable, [32.4 Gbps, Thunderbolt 4/3 Compatible] for MacBook Pro M1 M2, Mac Studio, Mac Amazon.com: Silkland USB C to DisplayPort 1.4 Cable [8K@60Hz, 4K@144Hz 120Hz, 2K@240Hz], 5K Type C to DP 1.4 Cable, [32.4 Gbps, Thunderbolt 4/3 Compatible] for MacBook Pro M1 M2, Mac Studio, Mac](https://m.media-amazon.com/images/I/71KBJXLZVsL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Silkland USB C to DisplayPort 1.4 Cable [8K@60Hz, 4K@144Hz 120Hz, 2K@240Hz], 5K Type C to DP 1.4 Cable, [32.4 Gbps, Thunderbolt 4/3 Compatible] for MacBook Pro M1 M2, Mac Studio, Mac
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