This post is a walk down memory lane of the past two months of mining.
Smashing 4 GPUs together doesn't work well at all without hardcore ducting. Turns out that this setup actually mines slower than 3 GPUs and a fan on top.
It turns out that the limiting factor is power density. I wasn't going to buy faster GPUs because of a poorer hashrate per dollar, so I needed to get more PCIe slots. I bought some dumb nodes to get my other pile of GPUs up, but after this fan cutting my hand (and losing a blade in the process), I resigned.
Pile of unused GPUs. These sat unused for the duration of mining.
My two former miners:
tl;dr Making money is hard.