Intel unveils the Thunderbolt 4 spec, which AMD believes it can use

Intel unveiled Thunderbolt 4 on Wednesday, tightening the existing I/O specification for docks, some displays, external storage and GPUs. Bandwidth remains unchanged from Thunderbolt 3, though executives said to expect new types of docks and longer cables. AMD, which has traditionally never associated Thunderbolt with its Ryzen platforms, pooh-poohed Thunderbolt demand but said it meets the spec’s security restrictions.

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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