Can the 1080ti go on beast mode with Monero and deliver better profits than ZEC?
1080ti isn't a particularly good Monero mining card. It's EFFICIENT, but the hashrate doesn't justify the price (a BIOS-modded RX 470 can almost match the hashrate at similar power usage).
Sweet spot there seems to be a modded good-overclocking RX 470/570 or some of the lower-end Pascal NVidia cards (or the GTX 750ti for low-cost rigs still does well at 250 hash/s or so on 50 watts or so power draw in my fairly limited testing that probably was NOT optimised).
Hell, no fancy bios mod required. An XFX RX 470 with the 1625 strap copied upwards will get you 860+ hashes on Monero and draw not much power.