I really wanted to challenge myself to fit as many components into an SFF case. The Meshlicious was perfect for this.

Gigabyte and ASRock motherboards will often support PCIe bifurcation, which in tandem with a special PCIe bifurcation board, allows me to plug in two PCIe cards. However, to be able to route the PCIe riser and bifurcation board, I needed to grind down the "lip" on the back of the Meshlicious's motherboard tray. Otherwise, the riser would have to be uncomfortably crushed against said "lip".

For the first PCIe card, I went with a 3070 FE, since it's the most powerful GPU that will fit horizontally in the Meshlicious when watercooled. AIB 3070s and all other more powerful 30-series cards have PCBs that are too long to fit horizontally. All of the AMD cards I could find with a short enough PCB were stuff like the 6600, which aren't exactly worth watercooling, and aren't as powerful as the 3070. It's also nice to have an NVIDIA card, since I occasionally do a bit of CUDA development. NVIDIA Linux drivers are working just fine for me (granted, I'm not really gaming here, so YMMV).

For the second PCIe card, I went with an AVerMedia Live Gamer 4K. Main reason being is that this thing has Linux drivers. The drivers don't allow you to control the obnoxious RGB LEDs, however, so I took a soldering iron and removed all of them. I also removed the shroud so that it would have marginally better airflow over it, as it's right up against the backplate of the GPU.

The main reason I was so adamant on putting the GPU and capture card horizontally was to accommodate a pump-res combo near the bottom of the case. The EKWB FLT 80 fits perfectly. I also wired the pump up to the Noctua NA-FC1 fan controller (I guess in this case, it's a pump controller) so that I can manually turn a knob to control pump speed. I also ditched the SATA connector, and wired it straight to the PSU for better cable management. (I don't really recommend this because you can blow up your pump if you wire it wrong, not to mention if you switch PSUs the wiring will be incorrect.)

I'm using an ATX PSU because I was too lazy to buy another SFX PSU, especially when this one fits and works perfectly.