![]() ![]() Placement of the Thunderbolt 3 controllers on the notebook’s logic board As it turns out, support for DisplayPort 1.4 is reliant on built-in graphics, which vary by MacBook Pro model. Older MacBook Pro models released in 20 used Intel’s previous JHL6540 Thunderbolt 3 controller with support for DisplayPort up to version 1.2. Intel’s specs sheet clearly states that the new JHL7540 controller provides the same Thunderbolt 3 40 Gb/s performance and feature set as the Alpine Ridge chips while adding DisplayPort 1.4 capability for “increased video performance”. Even though Apple’s refreshed MacBook Pro models for 2018 feature an iFixit-identified JHL7540 Thunderbolt 3 controller from Intel, unveiled in January as part of the Titan Ridge platform, the notebooks don’t truly support the DisplayPort 1.4 specification. ![]()
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