The Mac Pro introduced in 2019 has eight PCIe slots:
- Four double-wide slots
- Three single-wide slots
- One half-length slot preconfigured with the Apple I/O card
The Expansion Slot Utility app is designed for managing and configuring PCI cards, and its return is clearly meant for the Mac Pro, which has a total of eight PCIe expansion slots that Mac users can work with. The Expansion Slot Utility app was discontinued years ago following the launch of the 2008 Mac Pro but the new 2.0 version is back for. The Mac Pro includes a total of eight PCI Express expansion slots, which can be used in a variety of different ways. Air supply from the case's front fans and pipe the air through to the. Apple currently has three different Mac Pro Expansion (MPX) Modules that contain AMD Radeon Pro graphics processing units (GPUs). Radeon Pro MPX Modules can use slots 1-2 and slots 3-4, and you can install one or two of each module.
Mac Pro includes one or two Radeon Pro MPX Modules that occupy slots 1-2 and slots 3-4. You can choose your MPX Modules when you order your Mac Pro or order them separately from Apple. Learn how to install PCI cards in your Mac Pro (2019).
Apple AMD Radeon MPX Modules
Apple currently has three different Mac Pro Expansion (MPX) Modules that contain AMD Radeon Pro graphics processing units (GPUs). Radeon Pro MPX Modules can use slots 1-2 and slots 3-4, and you can install one or two of each module:
- Radeon Pro 580X MPX Module: one module only
- Radeon Pro Vega II MPX Module: one or two modules
- Radeon Pro Vega II Duo MPX Module: one or two modules
You can use Radeon MPX Modules along with other third-party PCIe graphics cards. If you use Boot Camp, using a Radeon MPX Module and a third-party AMD graphics card isn't supported when your Mac is using Windows. Learn about using AMD graphics cards with Microsoft Windows on Mac Pro (2019).
Apple I/O card
Mac Pro Expansion Module
Mac Pro comes with the Apple I/O card, which has two Thunderbolt 3 ports, two USB-A ports, and a 3.5mm headphone jack. The Apple I/O card comes preinstalled in slot 8 and can't be installed in another slot.
Third-party PCIe cards
You can install many different PCIe cards in your Mac Pro, such as fibre channel cards, fibre networking cards, and pro video and audio interface cards. The PCIe bus on your Mac Pro provides up to 300W auxillary power. If your PCIe card requires additional power, such as a GPU, use the Belkin Aux Power Cable.
Mac Pro supports the same GPUs that are supported by external graphics processors (eGPUs). If you use Boot Camp and want to install a NVIDIA card to use in Windows on your Mac, don't install the card in slot 2. Learn about using AMD graphics cards with Microsoft Windows on Mac Pro (2019).
Mac Pro Expansion Slot Fan Game
Some older PCI cards might use 32-bit Option ROMs that aren't compatible with your Mac Pro. If you install a PCI card that uses 32-bit option ROMs, your Mac Pro might not start up correctly.
Afterburner
Mac Pro Fans
Afterburner is a hardware accelerator card made by Apple. Learn more about Afterburner.
Expansion Slot Fan
RAID cards
If you want to add additional storage, you can install a third-party RAID card, such as a SAS RAID card, or you can install the Promise Pegasus R4i 32TB RAID MPX Module in one of the two MPX bays. If you use Boot Camp on your Mac, Windows doesn't support Apple software RAID volumes.