DisplayPort 1.3 and 1.4 can daisy chain DisplayPort monitors up to 4K resolution, though only two of them at the highest resolution and only at 60Hz (even though DisplayPort does support higher refresh rates). They could do up to six 1080p daisy chain monitors, however.
Can you daisy chain two monitors with DisplayPort?
Can you run 2 monitors off 1 DisplayPort?
2 daisy chainable displays have both a DisplayPort input and a DisplayPort output. The DisplayPort output connects to the next downstream display. This cabling arrangement, with one DisplayPort cable between each set of monitors, provides a less cluttered system configuration.