Why am I not getting the full 40 Gbp/s speed from my Thunderbolt 4 connection? High data transmission rates like these enable new applications, such as solid state drive (SSD) storage arrays and external graphics cards (eGPUs).

Further accounting for PCIe 8b/10b encoding and TB4's own overhead, you arrive at a peak data throughput of approximately 22 Gb/s. Approximately 8 Gbp/s can only be used for video, leaving 32 Gb/s for non-video data (PCIe 3.0: 4 lanes x 8 Gb/s). However, this is a bit misleading because not all of that bandwidth can be used for data transfer. Thunderbolt 4 has a maximum bandwidth of 40 Gb/s. A monitor with a Thunderbolt port can also charge a higher wattage device like a laptop. Thunderbolt lets you daisy-chain two 4K monitors, so at least one monitor will need two Thunderbolt ports, one for the signal from the host computer and the second to relay the video to the second monitor. Yes, a Thunderbolt monitor has a USB-C Thunderbolt port.

Is a Thunderbolt monitor different from a USB-C monitor? This fallback mode also allows a Thunderbolt device to be connected to a non-Thunderbolt USB-C port and still function, albeit at a USB3 level. Yes, a Thunderbolt port will negotiate data rate, power and video capabilities with the connected device and 'fallback' to the USB protocol if the device is not Thunderbolt-enabled. However, to get the benefit of Thunderbolt performance, you need to connect one Thunderbolt device to another, such as a Lenovo Yoga 9i laptop to a Thunderbolt-enabled monitor or dock.Ĭan I plug a USB-C device into a Thunderbolt 4 port? Yes, Thunderbolt 4 ports will accept any cable with a USB-C connector. supported data transfer speed over passive cableĬan I plug a USB-C cable into a Thunderbolt 4 port?

Thunderbolt 4 surface