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Difficulty: MediumDisplay Cables and Connectors

An IT technician upgrades a user's workstation monitor to a new display with a native resolution of 2560×14402560 \times 1440. The computer's graphics adapter is connected to the monitor using a single-link DVI-D cable. After powering on the display, the technician observes that the maximum selectable resolution in the operating system is capped at 1920×12001920 \times 1200 at 60 Hz60\text{ Hz}. Which of the following actions will allow the monitor to display at its full native resolution while maintaining a DVI connection?

  1. Replace the existing cable with a dual-link DVI-D cable.Answer
  2. B
    Replace the existing cable with a DVI-A cable to enable analog signal transmission.
  3. C
    Connect a standard USB-C charging cable between the host USB port and monitor service port to add data channels.
  4. D
    Attach a passive DVI-D to VGA adapter to transmit higher frame rates over the analog pins.

Answer

Replacing the existing cable with a dual-link DVI-D cable provides the required bandwidth to support the 2560×14402560 \times 1440 native resolution.
Single-link DVI-D cables are physically constrained to a maximum resolution of 1920×12001920 \times 1200 at 60 Hz60\text{ Hz} due to carrying only one TMDS video link. Dual-link DVI cables utilize a second TMDS link across additional connector pins, doubling the available video data rate and enabling resolutions up to 2560×16002560 \times 1600 at 60 Hz60\text{ Hz}, which fully supports the monitor's native 2560×14402560 \times 1440 resolution.

Step-by-Step Solution

1
Identify the bandwidth limitation of single-link DVI-D interface.
Single-link DVI-D uses a single transmitter operating at a maximum clock rate that limits resolution to 1920×12001920 \times 1200 at 60 Hz60\text{ Hz}.
The observed symptom (1920×12001920 \times 1200 resolution cap on a 2560×14402560 \times 1440 native monitor) matches the physical bandwidth ceiling of a single-link DVI configuration.
2
Determine the cable specification required for resolutions above 1920×12001920 \times 1200 over DVI.
Dual-link DVI utilizes 24 digital pins (providing two TMDS links) to double the data throughput.
Dual-link DVI-D supports resolutions up to 2560×16002560 \times 1600 at 60 Hz60\text{ Hz}, meeting the display's 2560×14402560 \times 1440 requirement.

Key Concept

Single-Link vs. Dual-Link DVI Bandwidth Capabilities
Estimated Time:1m 0s
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Topics

Display Cables and Connectors

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