The_Stig

Pretty balanced as is, and I wouldn't change anything for a while. With that being said, my suggestion for a future upgrade would be either CPU or GPU.

Try to boot with only one RAM stick. If that doesn't work, change the channel that the RAM stick is in and try again. Repeat if you have multiple RAM sticks. If it never works with a new stick, but works with different RAM, the new stick of RAM is faulty. Make sure the basic things are also secure, like the display cable and all power cables.

It'll help, but it shouldnt make any dramatic increases in performance. If it's running in single channel it's either because they're installed in adjacent slots or somethings weird in the BIOS.

I'd at least wait for the AMD 3000 (Zen 3?) series before upgrading, but at 1080p you should be good for a few years.

Yeah, as @NunoLava1998 said, you'll probably want either the 32 or 64, but they can get pretty expensive.

If you can get to the battery itself you'll be able to tell if its the problem. Dead LiPos usually 'puff' out and expand slightly. I've got a few drones myself and it always sucks when I loose a battery. You can sometimes revive low voltage batteries by slowly charging them on a balance charger, but it wont always work.

I'd go for the 16gb personally, but you may benefit more from the 32 because of the massive HDD you're using.

I don't see why you couldn't get optane to speed up the HDD. As long as your mb/cpu have enough slots/lanes it should work. I recently did a similar build with 16gb optane and it worked fine, but to be honest I didn't feel there was a huge improvement between optane HDD and HDD only.

9700k/RX480 here

Anything under 70c is pretty good IMO. Anything under 90c is "safe," and anything below 60c is crazy good.

What?

no problem, hope it all works well for you

It should be a good one to start with. Some cheap mobos can be unreliable but ASUS has a good reputation. I use ASRock on most of my build and I'm yet to have a problem. You'll be able to upgrade the CPU in the future and something like a i5 may be useful if you need more CPU cores.