Use the Radeon Pro W6800X Duo MPX Module with your Mac Pro

The Radeon Pro W6800X Duo MPX Module contains two AMD Radeon Pro W6800X graphics processing units (GPUs) with 32GB of GDDR6 memory each, four Thunderbolt 3 ports and one HDMI 2.0 port. You can use the Thunderbolt 3 ports to connect displays and external devices to your Mac Pro, and also use the Thunderbolt 3 ports on the top* and rear of your Mac Pro to connect additional displays. 

If you use Boot Camp and install a third-party graphics card from AMD, you may need to use different AMD drivers in Windows.

The MPX module has two buses for its Thunderbolt 3 ports. If you connect two 5K or 6K displays to the Thunderbolt 3 ports on your MPX module, connect one display per bus.

If you connect a display to the HDMI port on your MPX module, the Thunderbolt 3 ports on Bus 0 can support one additional display with a resolution of 4K or lower. If you need audio output from a display connected to the HDMI port and have other displays connected over Thunderbolt 3, don't connect a display to the Thunderbolt 3 port next to the HDMI port.

If you install a single Radeon Pro W6800X Duo MPX Module, you can connect up to eight displays using Thunderbolt 3 in these configurations.

Six Pro Display XDRs with resolutions of 6016 x 3384 at 60 Hz connected as follows:

• Two displays on Bus 0
• Two displays on Bus 1
• One display on a Thunderbolt 3 port at the top* of your Mac
• One display on a Thunderbolt 3 port at the rear (Apple I/O card) of your Mac

Four 5K displays with resolutions of 5120 x 2880 at 60 Hz connected as follows:

• One display on Bus 0
• One display on Bus 1
• One display on a Thunderbolt 3 port at the top* of your Mac
• One display on a Thunderbolt 3 port at the rear (Apple I/O card) of your Mac

Eight 4K displays with resolutions of 3840 x 2160 at 60 Hz connected as follows:

• One display on each Thunderbolt 3 port

If you install two Radeon Pro W6800X Duo MPX Modules, you can connect up to 12 displays using Thunderbolt 3 in these configurations.

Ten Pro Display XDRs with resolutions of 6016 x 3384 at 60 Hz connected as follows:

• Two displays: one on Bus 0 of each card
• Two displays: one on Bus 1 of each card
• One display on a Thunderbolt 3 port at the top* of your Mac
• One display on a Thunderbolt 3 port at the rear (Apple I/O card) of your Mac

Six 5K displays with resolutions of 5120 x 2880 at 60 Hz connected as follows:

• Two displays: one on Bus 0 of each card
• Two displays: one on Bus 1 of each card
• One display on a Thunderbolt 3 port at the top* of your Mac
• One display on a Thunderbolt 3 port at the rear (Apple I/O card) of your Mac

Twelve 4K displays with resolutions of 3840 x 2160 at 60 Hz connected as follows:

• One display on each Thunderbolt 3 port

Infinity Fabric Link is pre-installed on your MPX module and enables data transfer between the GPUs that is up to five times faster.

• When using a single Radeon Pro W6800X Duo MPX Module, the Infinity Fabric Link jumper should be installed, enabling apps that support Infinity Fabric Link to use it.
• When using two Radeon Pro W6800X Duo MPX Modules, the Infinity Fabric Link bridge should be installed, enabling all four GPUs to work together in supported apps:

Infinity Fabric Link bridge for Radeon Pro W6800X Duo MPX Module (Model A2667) isn't compatible with previous-generation Radeon Pro MPX Modules.

If you use Boot Camp and have the Infinity Fabric Link bridge installed, the Thunderbolt 3 ports on Bus 1 and the top* of your Mac Pro can't be used to connect displays.

• Find out about the PCIe cards that you can install in your Mac Pro (2019).
• Install PCIe cards in your Mac Pro (2019).
• Set up and use Apple Pro Display XDR.

* On rack-mounted models, there are two Thunderbolt 3 ports on the front of Mac Pro.