It will need a BIOS upgrade for a Ryzen 5000 SERIES chip. The Ryzen 5 3600 is a 3000 series chip. It will work out of the box. I have a B550 board and my Ryzen 9 3900XT worked flawlessly.I did think about putting something in the computer but I only had bubble wrap or styrofoam and I was afraid they might damage the inside, good about the to know since in a year or two I'll need to ship it again.
The fan connector is the mounting connector to the board (the four little "feet" thing around the fan), the pin are all fine as far as I can tell. I'll pop into best buy and see if I can find a replacement for the fan, those should be pretty standard right? I need to go anyway since I found out the reason the other SSD isn't working is the cable so I need to buy a new one.
Good to know about adorama, guess I'll wait for something else to show up.
For the B550, pc part picker says it might need a Bios upgrade for ryzen 5, I'm really not sure how you'd do a Bios upgrade on a new computer without a chip in it. I don't need anything fancy for motherboard (don't need Wifi, bluetooth and won't play with overcloacking so I'm not really picking for motherboard).
Admittedly AMD is kind of coy with its conventions here. There are Ryzen 3, 5, 7, and 9 CPUs to represent the different performance levels, but the series of the chip is given by the XX00 name. So as before, a 3600 is 3000 series chip and will work first time no sweat. If however your chip is the 5600, you will need a bios update. And spoiler, that isn’t something you can do with the 5000 chip installed since it won’t even post with one without it.