DisplayPort Evolution, Gaming Applications, and Challenges

Since the release of DisplayPort 1.2 by VESA in December 2009, manufacturers have been integrating DisplayPort into devices such as monitors. In pursuit of higher-end gaming settings and improved gaming experiences, gamers have increasingly adopted DisplayPort with higher bandwidth and performance.

DisplayPort standard has progressed to DP40/DP80. DP40 supports UHBR10 (4-channel maximum 40Gbps throughput), and DP80 supports UHBR20 (4-channel maximum 80Gbps throughput). However, despite the advancements in specifications, gamers worldwide may encounter an issue known as the “DisplayPort Pin20 continuity problem“. This problem may arise from DisplayPort cables with special specifications, potentially causing boot and display issues when users attempt to connect these cables to monitors and graphics cards.

DisplayPort Evolution, Gaming Applications, and Challenges

Potential Risks of DisplayPort Cables with Special Specifications: Short circuits, graphics card failures, monitor damage

DisplayPort cable DP_PWR (Pin 20) is part of the VESA standard. This means that most DisplayPort cables from third-party brands have the DP_PWR pin. However, according to VESA specifications, DP_PWR (Pin 20) is not wired. Yet, when connected between a source and sink, it may provide a voltage of 3.3V (+/- 10%) and a current of 500mA, potentially leading to the following issues:

  1. Short circuits may occur when the voltage at DP_PWR differs between the source and sink.
  2. If the monitor is turned on while the graphics card is off, this connection may lead to graphics card failures or monitor damage.

If a brand requires special applications (such as power supply) using DP_PWR, cable suppliers may be asked to manufacture cables with special specifications. In such cases, these cables may have DP_PWR continuity issues. The risks above may arise if these cables are used for general purposes.

Allion Test Solutions

DP_PWR (Pin 20) in DisplayPort cables is not wired according to the VESA standard. However, inadvertently using cables with special specifications may cause damage to other products. Therefore, using cables that meet standard specifications is the best option. Allion’s testing team offers two solutions:

  1. Use certified cables.
  2. Conduct actual line tests on DP_PWR (Pin 20).

Allion specializes in testing and certifications, including DP_PWR (Pin 20) among its many testing items for DisplayPort cable certification. The team also conducts tests on a range of other specifications for these cables.

Allion specializes in testing and certifications, including DP_PWR (Pin 20) among its many testing items for DisplayPort cable certification.

Faster, Easier, Better! DisplayPort Cable Testing Services

Allion is a VESA-accredited test lab with deep expertise in DisplayPort testing and technical support. We offer the following advantages:


Allion has extensive experience in cable and connector testing, providing quick test results after receiving customer products, making customers pioneers in the market.


Allion conducts feasibility assessments and promptly provides appropriate test item recommendations and corresponding solutions upon receiving testing requirements, effectively solving product problems.


Allion integrates and analyzes various test data to help optimize product quality and reliability. The company also offers customized testing plans, providing suggestions for improvement and testing recommendations, thus reducing the time-consuming issues in product development.

Allion_Faster, Easier, Better

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