Intel unveils the Thunderbolt 4 spec, debuting in PCs in the fall

Intel unveiled Thunderbolt 4 on Wednesday, the next iteration of the I/O specification that provides a high-speed peripheral bus to docks, displays, external storage and eGPUs for PCs. Rather than increase the available bandwidth, however, Thunderbolt 4 provides more clarity and helps create new categories of products.

Thunderbolt 4 will debut later this year as part of Intel’s “Tiger Lake� CPU platform, as Intel originally announced during CES in January. We now know it will support 40Gbps throughput, but with tighter minimum specs. Thunderbolt 4 will guarantee that a pair of 4K displays will work with a Thunderbolt dock, and require Thunderbolt 4-equipped PCs to charge on at least one Thunderbolt port. Thunderbolt PCs will be able to connect to either “compact� or “full� docks with up to four Thunderbolt ports. Longer Thunderbolt cables will be possible, too.

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