Also, can I ask you why you have the CPU fan pulling air off the GPU and creating turbulence in this otherwise beautiful NAS? I know the cooling is probably perfectly adequate even with that, but ahhhhhh lol.
I've had something similar due to the limitations of a narrow ILM vs square ILM board, but I think my solution was to rig/butcher it until it pointed the cooler correctly, that or I bought a mounting adapter or something. Either way, I remember that I viscerally hated it and wouldn't let it sit like that despite being 45w CPUs, and this post reminded me of it haha.
The CPU cooler is in that orientation because it's the only way it'd mount on the board. The good news is that the GPU is a blower style GPU so the CPU isn't really affected.
Mine didn't start like this, mine initially had only 3 drives and was run in RAIDZ1.
It was a couple years before I got to 8.
NGL though I kinda wish I lived with 3 for longer and went with bigger drives when I upgraded, but I'm happy with my ~42TB of space and 2 redundant disks.
I still have quite a few (all but 1) open SATA ports due to the card between the GPU and SSD. All those neatly bundled SATA cables plug into that card.
The card in question is HBA card, specifically a LSI 9207-8i card. They regularly go for about $40 on eBay. If you buy one make sure that it's in IT mode already, they usually are but if the seller doesn't mention it try a different seller.
Using just that card and a couple cables (literally 2) you add the ability to add 8 drives to your system.
Edit: I should specify that the 2 cables are SAS to SATA cables. You basically have to find the correct one for your card as there's a couple kinds of SAS to SATA cables.
That sounds so much more efficient than hunting for a motherboard with 8 SATA ports and dealing with all those cables.
Do the drives still show up as separate devices? Its not doing any hardware-raid? I'm just wondering if I can swap to one of these when I need to upgrade my system.