Dichen 4k Fuser

The Dichen DC1A686-D3ZC operates as a DisplayPort 1.4 signal processing and fusion device within compatible PCIe DMA hardware environments. Two host signals enter on separate full-bandwidth DP 1.4 inputs and the unit outputs one signal to the display, so a second machine's output shares the primary screen and can be switched with one touch. The two hosts run independently without interference and the unit stays stable under extended high-load operation.

Technical Specifications

• Interfaces: 3 × full-bandwidth DisplayPort 1.4
• Protocols: DSC, DDC, HPD, EDID, HDCP, MST, FEC and the full suite of low-level AUX protocols
• EDID: native automatic passthrough
• Colour: RGB and YCbCr, 8-bit / 10-bit / 12-bit
• 1280 × 720: 1–1000 Hz+ (theoretical peak 1350 Hz+)
• 1920 × 1080: 1–639 Hz
• 2560 × 1440: 1–364 Hz
• 3440 × 1440: 1–264 Hz
• 3840 × 2160: 1–164 Hz
• 5120 × 1440: planned via firmware update
• Architecture: hardware-level signal interconnection, full bandwidth across the whole system
• Version: Flagship (Deluxe and Standard not yet available)

Compatibility

Tested with 62 display models from different brands at every refresh rate within the supported bandwidth, with an overall compatibility rate of 99%. Low-level protocol tuning lowers the compatibility requirements, so both high- and low-spec hosts run stably at full refresh rate. This positions the unit within the display layer of a DMA system, working alongside compatible DMA cards and related components; it also works as a two-host DisplayPort switch for office, esports, camera, projector, microscopy and medical display equipment.

Maximum refresh rate depends on the GPU, driver, cable and display in use. Some GPU drivers enforce DSC compression at high refresh rates, which is a GPU-side limit rather than a fuser limit. Always confirm compatibility with your configuration before purchase.

Native EDID automatic passthrough
Fast, stable protocol handshaking that prevents abnormal communication errors.

One-click display information customisation
Set the display serial number and hardware ID with one click. Stored permanently, so new display device information is generated quickly.

Mixed-resolution dual-device output
Primary and secondary hosts output simultaneously at different resolutions, including stable 2K 360 Hz with 1K 360 Hz.

Intelligent resolution scaling
A 2K high-refresh display can run 1K ultra-high-refresh output specifications.

One-touch dual-host switching
Instantly switches the display between the two hosts for seamless transitions between office and entertainment use.

Capture card live streaming
Flagship exclusive: the fused output can be sent to a capture card for live streaming.

Firmware upgrades
Built-in official serial-port upgrade interface with long-term firmware updates. Upgrades unlock 5120 × 1440 support, continue to optimise performance and add new functions, maintaining the device's long-term value.

Complete setups and related components are available in our DMA Cards, DMA Bundles, Input Devices and Firmware collections. Need an HDMI input as well? See the Dichen DC500 and Dichen DC505.

Shipping
In-stock orders are dispatched within 1–2 business days; pre-orders are dispatched as soon as stock arrives. Hardware is securely packaged in FTW DMA protective packaging with tracking included on every order. Worldwide delivery available.

Returns
We accept returns within 14 days of delivery for unused hardware in original condition. To start a return, open a support ticket via our Discord or email us directly. Items must be returned in original packaging.

Warranty
All FTW DMA hardware is covered by a 12-month limited warranty against manufacturing defects. Warranty claims are handled promptly through our support team.