Hey all, after doing a bit of trial and error tonight, I found out that my only problem here was a dead SATA cable. I did some swapping around until I narrowed down which cable was causing the problem, put in a new one, and now all of my drives are showing up.
Man, do I feel dumb right now.
But anyway, thank you all for bearing with me/pitching fix suggestions (that could probably help other people in the future, maybe).
Looking at this menu, this is all that is showing up for me at the moment. The "C" and optical drives are showing up just fine, but still no sign of the other drive, even after trying a rescan of my system.
Sorry for the late reply, I had a busy day yesterday and was unable to try this until just now.
But, I just tried this out, and the second drive still fails to show up. I even took both drives and stuck them in the rear 2.5" bay together so I could directly connect both of them to the PSU and the motherboard like how they were in my last case, but the 2 TB drive is still not showing up for some reason.
The "C" drive is the 1 TB one, and the second drive that is not showing up (what should be the "E" drive) is the 2 TB one.
At the moment, the "C" drive is showing up as it should.
Both are equally terrible.
Alright, so the Noctua paste wins by a landslide. Guess that I will just keep everything else in storage for a later date if necessary.
Thank you all for your help on this matter.
I have been looking around for any compatible liquid CPU coolers that might work in this case, but I keep coming up dry. It seems that the low-profile cooler that I am using now is just about as good as I can get here.
Admittedly, if I could find a case that was at/shorter than 10 inches in height, I would look into water cooling for that, since it should be compatible in there.
Honestly, I originally wanted my computer to be on the floor. That way, I could have used a full-sized tower with better cable management, and be able to use whatever drives without being bothered by the sound.
But, I would not trust something this valuable being within the reach of my dog who, within the first week of us having her, completely ripped through my last phone charger when I left her alone for two minutes. I love her to death, but my level of trust with her after that talked me out of a full tower build.
To be honest, I initially considered a Western Digital Black drive, but I kept hearing reports of it being very noisy during reads/writes. Since this PC is more or less right next to me, I decided against having all that noise right in my ear, and opted for that drive instead.
That, and it is one less thing to worry about defragmenting or getting bumped and possibly scratched.
Oh right, I forgot about that topic, sorry.
But, it turns out that the motherboard was dead on arrival. I got it replaced, and everything worked as it should right after that.
I just attempted the "paper clip" test for my PSU, and while the fan did not spin up (presumably because of the "no fan activity under 40% load" thing), I could hear something inside of the unit click on, followed by a sustained low humming,so I believe that there is nothing wrong with it.
Just tried removing the two parts and connecting both HDMI and DP to the motherboard (separately), but still nothing, unfortunately.
And I have actually been thumbing though that guide for answers, but nothing suggested in there seems to be working here.