JasperNuijten

They are amazing. Good software, the daisy chaining, good performance. Only downside is that they are fluid dynamic but that should be fine if you aren't a complete snob.

Sup man,
 
1. No heatsink on the ssd should be fine. There are heatsinks on your motherboard.
2. Honestly get whatever brand you can get, EVGA and Asus are both good.
3. Both insanely good psu's.
4. Noctua has more fans that are in stock. Other brands you can look at are Corsair, BeQuiet! and Lian Li.

Hey man,
The 3400G is fine for waiting for a GPU, don't expect a lot of performance tho.
 
The warning about the ram clearance is to be ignored if you are using a stock cooler.
 
The warning about the BIOS version is little more complicated; With the launch of ryzen 3rd gen b450 boards were also compatible with a BIOS update. Any boards that were made after the launch already have this new update. I would think that this board was produced after the launch since it has been a pretty long time. Should probably be fine. If you did the build and it is not posting that could be the issue you are having. Then you need a ryzen 2nd gen or lower cpu to update your bios.
 
For the ram: the trident Z is cool but not needed(looks cool tho). The other option i would not suggest, you probably should get at least 2x8 sticks. You can get a decent kit for about 80-90 bucks.
 
All of your ssd's are good choices; all have a DRAM cache.
 
Power supply looks good.
 
Cases are for the most part personal preference but these look fine.
 
That's a pretty good monitor deal if you need 4k.

How secure is this? I know someone who is looking for an affordable video baby monitor, but they want something that can't be (super easily) hacked into

Cool

It's possible that the initial download was corrupted.
 
I would delete steam and all the games, from your comp, then reinstall Steam and only this one game.
 
I hope you can fix it