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The M1 Macs cannot do dual 4K displays because the Thunderbolt controller has only one DisplayPort connection.

Posted by: M1 Macs come with Thunderbolt 4 ports.Īpple can’t call it Thunderbolt 4 because Thunderbolt 4 requires that a Thunderbolt 4 port can do dual 4K displays.

You should be able to get the full performance (≈ 980 MB/s) from a USB 3.1 gen 2 port (that is not powered by an ASMedia ASM1142) of a Thunderbolt 3 dock. People have found that the USB controllers have less than optimal performance (≈200 MB/s slower than expected) so 760 MB/s directly from the M1 USB-C port. Some M1 Mac performance info not discussed: You have to check ioreg for PCIe switches (or use pcitree.sh at but that can’t work without an update to pciutils for M1 Macs… maybe replace AppleACPIPlatformExpert with AppleARMPE or create a new DirectHW.kext…) Do these GPUs have a built-in PCIe switch? Or is Big Sur on M1 Macs defaulting to capability value instead of status value for picture doesn’t show Link Speed. Link width says x16, but link width in a Thunderbolt enclosure is always x4.

Due to no ARM drivers, Radeon graphics cards do not work and therefore eGPU is a in your picture at Apple uses the same internal 150W (12V~12.5A) PSU as found in the 2018 Intel Mac mini.Īt the moment Thunderbolt devices are working well with Apple M1 Macs. It’s a nice surprise to see two Intel JHL8040R controllers providing dedicated connection to two Thunderbolt 4 ports. I was most interested in identifying the Thunderbolt controller/s. On the backside of the logic board is a pair of Texas Instruments USB-C controllers. In my opinion, thermal dissipation with this new system is better. Unlike the cooling system in the Intel unit, the heatsink in this M1 Mac mini is a beefy block. The logic board is barely twice the size an iPhone 12 mini. Apple could have redesigned the M1 Mac mini to be much smaller. The antenna connector is secured in place with a T6 screw.Īnother set of four T6 screws mount the cooling fan on top logic board. The are three antennas with separate cables going to the logic board headers, one of the antennas is mounted on the bottom metal shield. Flip it upside down then pry the black plastic base cover would expose six TR6 screws. Taking this Late 2020 M1 Mac mini apart is very similar to the 2018 model. The Apple integrated graphics card cannot run more than two displays at once. This setup has been working great through RX Vega 56 Nano Gaming Box with my 2018 i5 Mac mini.

I prepared my Mac mini test station with three monitors: Samsung 34-in Thunderbolt 3 ultrawide QHD, LG 27-in DisplayPort UHD, and ASUS 15-in portable USB-C FHD. All M1 Macs come with Thunderbolt 4 ports. As soon as the M1 Mac mini arrived, I tore it down to confirm a few things Apple didn’t make clear.