I’m looking to upgrade my ‘09 Mac Pro’s GPU and have been trying to compare different AMD GPUs. My Mac Pro has the following specs: Mac Pro (Early 2009), 3.33GHz 6-Core Intel Xeon, 32 GB 1333 MHz DDR3, AMD Radeon HD 7xxx (HD 7850) 2048 MB with a 120GB SSD for a startup disk. I’ve upgraded the Intel CPU, added two 16GB sticks of RAM although I’m considering adding a couple more, added the SSD in the empty lower SuperDrive bay for a startup disk and upgraded from a Nvidia GT-120 to the Radeon HD 7850. I also flashed the EFI so it reports back as a Mac Pro 5,1 instead of a 4,1. It runs High Sierra fairly well, although I am starting to think that a more powerful GPU might goose it a bit more. Knowing that many AMD GPUs are supported currently and using the list elsewhere from this site, I’ve been trying to figure out a good middle ground replacement for what I have now. Should I be using gaming metrics as done at gpu.userbenchmark.com? Or is there a better way to compare AMD models to help me come to a better decision? I also want to be able to run the shiny, pretty MacOS 10.14 without compromising on performance too. My plan is to keep running my old, trusty Mac Pro for at least a couple more years before retiring it.