Thanks to iFixit for sponsoring todays video! If you're working on literally any Mac repair you definitely need to check out their repair guides, tools, and parts! https://iFixit.com/lukemiani In today’s video I’ll be trying to fix a beleaguered 2009 4,1 Mac Pro that I got for free – with some issues. We’ll go through troubleshooting, quite a few parts, and definitely some repairs! Check out iFixit guides for Mac Pro: https://www.ifixit.com/Device/Mac_Pro_2009-2012 Pro Tech Toolkit: https://amzn.to/3bYIzdM Mac Pro RAM upgrade: https://amzn.to/3BYzluS Long screwdriver for taking off heatsinks: https://amzn.to/3iaZzSQ Metal GPU support and Mojave installation: https://support.apple.com/en-us/HT208898 CPU compatibility: https://forums.macrumors.com/threads/mac-pro-cpu-compatibility-list.1954766/ 4,1 to 5,1 Firmware patch: https://www.ifixit.com/Guide/How+to+Upgrade+the+Firmware+of+a+2009+Mac+Pro+41/98985 *Graphics clarification: if it was confusing in the video, by default you can use a card with up to 225W TDP; the slot and each of the 2 mini 6-pins can supply 75W each. If I had used a mini 6 to 8 pin adapter, it would try to draw 150W from one connector- you can easily fry the board with that. If your card is an 8 pin you need to draw power from both 6-pins. if your card has 2 6-pins you need to use 2 mini 6 to 6 adapters, not a mini-6 to dual 6-pin. If you want to use a card that's over 225W (Vega 64, Radeon VII) you'll need to mod the PSU. A Radeon 5700 xt draws 225 so that's the most powerful card you can run without modding. See this resource for installing the Pixlas PSU mod:https://thehouseofmoth.com/mac-pro-pixlas-mod/ Follow me on Twitter: https://twitter.com/LukeMiani Follow me on Twitch: https://www.twitch.tv/lukemiani Join my Subreddit! https://www.reddit.com/r/lukemianiyoutube Gear: iFixit Pro Toolkit: https://amzn.to/3bYIzdM Panasonic Lumix GH5: https://amzn.to/3b3oMtj Leica 12-60MM Lens: https://amzn.to/3hQ5URf Sennheiser MKH 416: https://amzn.to/31zGwt2 Zoom H6: https://amzn.to/2ECYSk6 Sennheiser MKE 440: https://amzn.to/2JRwIRU Edelkrone SliderOne V2: https://amzn.to/33mTZmt Amazon Links are affiliate codes and generate small commission to support the channel