For starters you should never carry profiles onto different BIOS versions, settings are added/removed/changed all the time. It's only a good idea to use export BIOS settings as backup for a single BIOS version. There's a reason why most vendors auto-wipe your saved profiles upon BIOS update.
For this 5800X>5800X3D upgrade, it's a particularly terrible idea:
- 5800X3D literally only works properly with AGESA 1206/1207/1208 BIOSes. Plenty of changes if you're coming from 1200/1201/1202/1203 BIOSes.
- 5800X3D also has zero PBO or CO controls on a stock BIOS (firmware will auto hide those settings).
- You cannot simply copy CO offsets from even a 5800X to another 5800X, let alone to a 5800X3D that has no Curve Optimizer without a modded BIOS. That's not how CO works. Every CPU sold is unique.
- MSI's latest AGESA1207 BIOSes have their own version of Curve Optimizer called Kombo Strike. It does not work the same way, there are only 3 settings, and you cannot copy settings over.
- Even on non-5800X3D, PBO usually exists in two or three separate locations that move around/disappear with AGESA updates.
Asus has just now reintroduced PBO and CO in their latest 4303/4408 BIOSes, but I don't think the rest have followed suit yet. For everyone else, you either use a modded BIOS, or use PBO2 Tuner in Windows to adjust PBO and CO.
Bottom line, redo your settings. No one's stopping you from exporting and using the text file as a reference to punch in settings, however.