Check out Keysight's RF Back to Basics Bootcamp: https://keysig.ht/XRnZU2 Free Altium Designer Trial: https://altium.com/yt/greatscott! Previous video (100W Power Bank video): https://www.youtube.com/watch?v=_WI9Nwqvplo You can get the shown parts here: (affiliate links) Power Supply: https://amzn.to/3WGNE18 USB Tester: https://s.click.aliexpress.com/e/_DmgsbSP USB PD Trigger board: https://s.click.aliexpress.com/e/_DDbqr3p Constant Load: https://s.click.aliexpress.com/e/_Ddo3Rqn Cable A: https://amzn.to/3UgVAVi Cable B: https://amzn.to/3DNu0YH Cable C: https://amzn.to/3NQ3tik Cable D: https://amzn.to/3GayXxV Cable E: https://amzn.to/3zTBwAp Cable F: https://amzn.to/3hlpwRv Cable G: https://amzn.to/3WFtvIX Cable H: https://amzn.to/3zSs40d Cable I: https://s.click.aliexpress.com/e/_DdpVABH Cable J: https://www.aliexpress.com/item/1005004089914259.html?spm=a2g0o.order_list.0.0.2e511802HMp73j Cable K: https://s.click.aliexpress.com/e/_DdrDicP Cable L: https://s.click.aliexpress.com/e/_DdpVABH Cable M: https://s.click.aliexpress.com/e/_DBN77d9 Facebook: https://www.facebook.com/greatscottlab Twitter: https://twitter.com/GreatScottLab Instagram: https://www.instagram.com/great.scott.lab/ Support me for more videos: https://www.patreon.com/GreatScott?ty=h In this video we will be having a closer look at USB-C cables and find out why most of them are actually not that great. We will be focusing on 100W power transfer so very fast charging. I will show you how much power loss 13 different USB-C cables produce and why most of them do not meet the standard specs. Let's get started! Websites which were shown/used during the video: https://www.usb.org/usb-charger-pd https://www.mi.com/global/product/xiaomi-11t-pro-120w-xiaomi-hypercharge/ https://www.usb.org/document-library/usb-type-cr-cable-and-connector-specification-release-22 https://satechi.net/blogs/news/pd-3-1-protocol-everything-you-need-to-know Thanks to Keysight for sponsoring this video. 0:00 The Problem with USB-C Cables 1:49 Intro 2:26 60W/100W cables? 3:14 E-Marker Chip? 5:04 Test Setup 6:42 The Worst Performing Cable 7:43 Test Results 9:50 Verdict