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Rectangular black KVM switch with front buttons and rear ports

SMA

SMA 403HDD 4-Port Triple Monitor KVM Switch 2 DP + 1 HDMI 8K@60Hz

SKU CH-FBJH-JE1C1

Connect four computers to three monitors with 8K@60Hz HDMI and 4K@144Hz DisplayPort, plus three USB 3.0 ports and audio

  • PC connections2 DP + 1 HDMI
  • Computer ports4 Ports
  • Monitor ports3 Ports
  • Supported video resolution3 Monitors KVM Switch DisplayPort: support resolution up to
  • Switching methodPush Buttons and Wired Remote
  • Monitor supportDisplayport, Displayport, HDMI
  • Share one keyboard, mouse and three monitors across four computers
  • DisplayPort up to 8K@30Hz or 4K@144Hz for high-resolution workflows
  • HDMI up to 8K@60Hz for ultra-clear video on the third display
  • Three USB 3.0 ports at 5Gbps plus dedicated audio and microphone outputs
  • Switch instantly via front buttons or the included wired remote

Four-Port Triple-Monitor KVM Switch

The SMA 403HDD lets four computers share one keyboard, one mouse and three displays. Each system connects through two DisplayPort and one HDMI cable plus a USB 3.0 link. The switch supports extended, mirrored or spliced layouts across all three screens.

Verify Triple-Display Capability

Every computer must drive three independent outputs — two DisplayPort and one HDMI — before it will work with this unit. If a laptop only offers one DisplayPort and one HDMI, an active adapter or USB-C dock is required. Confirm the graphics hardware can run all three monitors at the desired resolution and refresh rate.

Metal Enclosure With Rear-Facing Ports

The 21 cm wide chassis keeps all video, USB and power connectors at the back for a tidy desk. Front-panel push buttons and the included wired remote both switch the active system, while LEDs show the current selection. A 12 V DC adapter powers the switch and the three downstream USB 3.0 ports, which also carry audio and microphone signals.

How it compares

Measured against everything we stock in KVM Switches & Rack Consoles, at today’s prices. Recalculated every night.

Price $185.99
Pricier than about 77% of the 4,010 comparable items (median $105.49).

Specifications

Product
Model name403HDD KVM Switch
Product type2 DisplayPort +1 HDMI
Graphics
Monitor supportDisplayport, Displayport, HDMI
Ports & slots
PC connections2 DP + 1 HDMI
Computer ports4 Ports
Monitor ports3 Ports
USB supportWith USB support
Power
Power requirementsCome with DC 12 V Power Adapter
Size & build
Product dimensions21 cm × 10 cm × 6 cm
Product weight700g
In the box
In the box1x 4 Port USB 3.0 Triple Monitor KVM Switch, 4x USB 3.0 Cables, 1x Power Adapter, 1x Wired Button Switch, 1x User's manual.
More details
Switching methodPush Buttons and Wired Remote
Status lightsYes

Questions about this item

Which cables are included so I can connect four computers to three monitors?

The box contains four USB 3.0 cables, a wired remote button and a 12 V power adapter; you must supply two DisplayPort and one HDMI cable per computer yourself.

How do I know if my graphics cards can drive the advertised 8K@60Hz or 4K@144Hz modes?

HDMI output reaches 8K@60Hz or 4K@60Hz; each DisplayPort output reaches 8K@30Hz or 4K@144Hz, provided your GPU, monitors and cables also support those rates.

Will the three USB 3.0 ports run at full 5 Gbps when I switch between machines?

Yes, the integrated hub delivers USB 3.0 speeds up to 5 Gbps on all three ports and stays active whichever of the four computers is selected.

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