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Black adapter with short cable and three video ports: HDMI, DVI, VGA

Monoprice Inc.

Monoprice Inc. 12799 Mini DisplayPort 1.2a Thunderbolt to HDMI DVI VGA Adapter

SKU CH-X0SX-18XJK MPN 12799

Connects a Mini DisplayPort or Thunderbolt source to one 4K HDMI, DVI or VGA display at up to 3840x2160p 30 Hz or 1920x1080p 60 Hz

  • FeaturesConforms to DisplayPort 1.2a standard. Connects to both Mini
  • Connect to HDMI, DVI or VGA displays with one adapter
  • Supports 4K 3840x2160 resolution at 30 Hz via HDMI
  • Drives 1920x1080 monitors at 60 Hz over DVI or VGA
  • Works with Mini DisplayPort 1.2a and Thunderbolt video outputs
  • 6 inch cable with secure screw holes on DVI and VGA connectors

Mini DisplayPort 1.2a Thunderbolt Adapter

This passive adapter connects a Mini DisplayPort or Thunderbolt output to an HDMI, single-link DVI, or VGA display. It conforms to the DisplayPort 1.2a standard and supports HDMI resolutions up to 3840x2160 at 30 Hz, plus DVI and VGA up to 1920x1080 at 60 Hz. Only one video output can be active at a time.

Suits single-monitor setups needing flexible

Ideal for users who need to connect a modern Mini DisplayPort or Thunderbolt source to an older HDMI, DVI, or VGA monitor one at a time. Not suitable for buyers who want simultaneous multi-monitor output or support for AMD Eyefinity or NVIDIA Surround configurations. The passive design prevents those modes from functioning.

Check port type and monitor input before ordering

Ensure your source device has a Mini DisplayPort or Thunderbolt video output, not a standard DisplayPort or USB-C without video. Verify the target display accepts HDMI, single-link DVI, or VGA signals. Confirm you only need one active connection, as the adapter does not drive multiple outputs concurrently.

Highlights

  • Connect to HDMI, DVI or VGA displays with one adapter
  • Supports 4K 3840x2160 resolution at 30 Hz via HDMI
  • Drives 1920x1080 monitors at 60 Hz over DVI or VGA
  • Works with Mini DisplayPort 1.2a and Thunderbolt video outputs
  • 6 inch cable with secure screw holes on DVI and VGA connectors

Specifications

BrandMonoprice
Model112799
Part Number112799
FeaturesConforms to DisplayPort 1.2a standard. Connects to both Mini displayport and thunderbolt video outputs.
Shipping weight0.91 kg
Package size178 × 102 × 51 mm

Questions about this item

Does my computer need a Mini DisplayPort or Thunderbolt output to use this 12799 adapter?

Yes, the adapter plugs into a Mini DisplayPort 1.2a or Thunderbolt video output on the host computer.

Can I keep using my older 1080p DVI or VGA monitor with this adapter?

The adapter supports single link DVI and VGA up to 1920x1080p at 60Hz, so existing 1080p displays work without changes.

How do I confirm the adapter is delivering 4K over HDMI after I connect it?

Set the display to 3840x2160p at 30Hz in your OS display settings and verify the resolution shown on the monitor matches.

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