Question about StarTech USB Typ C — DisplayPort

For me from MacBook Pro 2017 with Touchbar to HP ZR30w the quality is great with 2560x1600 px resolution.

The question about quality seems strange to me because it is a digital signal. Either the cable works or it doesn't. In any case, it works perfectly for me from an iMac to an NEC PA272W (resolution 2560x1440). The cable itself looks well made and of good quality.