Apple's new Mac Pro tower has something PC users are all too familiar with: PCIe slots. What devices work inside of Mac Pro and macOS? Let's find out! 5-port USB PCIe Card - https://amzn.to/36XFMxS Samsung 970 EVO Plus 500GB - https://amzn.to/34Mlequ M.2 to PCIe Adapter - https://amzn.to/34M7hsy eBay U.2 drives - https://ebay.to/2tHfj9z U.2 to PCIe Adapter - https://amzn.to/2PIU6o9 Mac Pro RAM upgrade kit - https://amzn.to/38Zk0eW Blackmagic Design DeckLink Mini - https://amzn.to/370Ap0X Follow me on Twitter - http://twitter.com/snazzyq Follow me on Instagram - http://instagram.com/snazzyq The new Mac Pro has been released to the fanfare of its pro users who have been starved of a decent workstation option for years. While many argue about the value proposition and the preposterously high $5,999 starting price point, nobody is arguing about the added value of good 'ol—tried and true—PCIe slots. Will an PCIe NVMe SSD work inside of Mac Pro? What about a 4K Capture Card to use in Blackmagic's Davinci Resolve or OBS for streaming? Or, how about a USB expansion card to add to the relatively scant I/O? Perhaps a replacement GPU from NVIDIA would work for gaming on a Mac? Or, maybe, a sound card with a reasonably high end DAC and headphone amplifier? As a follow-up to our Mac Pro teardown and our Mac Pro review which will be forthcoming, we answer the question: what stuff can you put in a Mac?