Just picked up a Mac Pro 4,1. I see that it is in the supported list for this, however, do I need to upgrade to the 5,1 firmware? I was planning on doing this so I could run an nVME PCI-E drive as a boot drive, upgrade to a 6 core, and be able to natively run High Sierra. If I upgrade to 5,1 does that negate needing to do the ROM Patcher? Is that for if I keep it on 4,1? Also is the Geforce GT 120 supported? Thanks!