Mac Pro 4,1–>5,1 Firmware Upgrade — Anything I Should Be Wary Of?

I’m looking forward to upgrading my Mac Pro’s firmware to 5,1 but I’m concerned I may be overlooking some potential issues I may run into when updating.

Some system info: macOS 10.11.6 with a flashed GTX 980 Ti from MacVidCards. Four drives total, of of which are SSD, and one of which is PCI-e-based (not the main drive). Main drive has a boot camp partition running Windows 8.1.

Could anything listed here negatively affect the firmware update?

Don’t know, but I would check with since this is presumably something they’ve done. (Or at least they’d have heard from other customers if problems were encountered.)

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