So the parts arrived today, and I’m installing the motherboard. The problem is, in addition to the 24-pin power connector, there are slots for an 8-pin and a 4-pin, right next to each other. But the PSU has no 4-pin connector; it only has an 8-pin, and four 6+2s. What am I supposed to do? I see that on my own X570 board from MSI (similar to the new one, but a different model), I didn’t use it, and it seems to be running OK. So just ignore?
[Update a while later]
Well, it seems to be running fine without it.
The good news: It works. The bad news: The new processor isn’t compatible with Windows 8.1; it says it needs to upgrade to 10. And I can’t get good screen resolution, which will probably get fixed after an upgrade.
OK, $200 later, we upgraded to 10, but still crap resolution. Had to install Nvidia drivers to clean things up. But now all seems well. So far.