Plain-jane EVGA GTX 1080SC. So chosen because it was the only 1080 I could find at the time that only needed a single additional power header, I was building a mini-ITX based workstation, and space for wires was at a premium. No complaints, though, it's held up like a champ.

(This is the card: https://www.amazon.com/EVGA-GeForce-Support-Graphics-08G-P4-... )