Power pass-through: All the hubs we considered also have a USB-C port that allows you to plug in your charger without taking up a second port on the computer itself (if it even has a second port).Operating temperatures between 86-122 degrees Fahrenheit … are normal.” We didn’t measure anything at or even close to 122 degrees, but we would have disqualified any model going over that temperature as a safety hazard. As a representative from Satechi (a prolific hub and accessory maker responsible for one of our former picks) explained to us: “All the bandwidth that goes to Ethernet, HDMI, USB and SD card ports requires energy consumption and that’s transferred to heat. Heat: Because hubs and adapters can get hot during use-especially, judging from our experience, when Ethernet is in use-we also measured the temperatures of our picks with an infrared thermometer after 15 minutes of continuous data and Ethernet use to make sure they weren’t dangerously hot.(Note that unless you have reliable Gigabit Ethernet service, you won’t be able to measure if the port is actually performing at full speed.) ![]() For each model in the test group, we verified the connection speed in Network Utility on a Mac, which displays the maximum link speed. Most hubs with Ethernet ports support gigabit speeds, meaning data can transfer at up to 1,000 megabits a second.
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