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The DisplayPort standard does not specify any maximum length for cables, though the DisplayPort 1.2 standard does set a minimum requirement that all cables up to 2 meters in length must support HBR2 speeds (21.6 Gbit/s), and all cables of any length must support RBR speeds (6.48 Gbit/s).
On displays which do not support DSC, the maximum limits are unchanged from DisplayPort 1.3 (4K 120 Hz, 5K 60 Hz, 8K 30 Hz). [12] DisplayPort version 1.4a was published in April 2018. [13] VESA made no official press release for this version. It updated DisplayPort's DSC implementation from DSC 1.2 to 1.2a. [14]
Often now replaced by Mini DisplayPort. Female Micro-DVI port (rightmost) on MacBook Air: Micro-DVI: DVI-D dual link Replaced with Mini DisplayPort. DMS-59: twin DVI (for two monitors via an adapter cable) Apple Display Connector: Combines DVI, USB, and power. HDMI connector plugs (male): Type D (Micro), Type C (Mini), and Type A.
Copper Thunderbolt 4 cables up to 1.0 m (3.3 ft) are passive cables, while longer cables must integrate active signal conditioning circuitry. 2 m (6.6 ft) maximum is the length of active cables available from most brands, including CalDigit, [41] Cable Matters, [42] et al., while Apple are currently the only company that offers a 3 m (9.8 ft ...
The maximum length recommended for DVI cables is not included in the specification, since it is dependent on the TMDS clock frequency. In general, cable lengths up to 4.5 metres (15 ft) will work for display resolutions up to 1920 × 1200.
HDMI: The HDMI article states that "no maximum length for an HDMI cable is specified" (which would already make the 30m incorrect), however it also states that "certification is difficult to achieve for lengths beyond 13 m". Why a standards body doesn't actually define a standard for how their cables are supposed to work is beyond me but that's ...
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