Gen 6 240hz Guide

🧩 Introduction

The HDMI DMA Fusion 240Hz Video Overlay Box allows dual-PC video overlay by fusing a secondary PC's display on top of your main gaming display — ideal for streamers, DMA capture users, and developers.

🔌 Device Overview

🔦 Indicator Lights

Light
Description

D1

Power indicator (ON = device is powered)

D2

Fusion mode active indicator

H1

Signal detected from HDMI1 (host PC)

H2

Signal detected from HDMI2 (secondary PC)

🧷 Buttons & Functions

Button
Function

Power

Device on/off switch

K1

Show only the secondary PC display

K2

Show only the host PC display

K3

Enable fusion overlay mode (press repeatedly to increase transparency strength)

K4

Switch encoding format (RGB / YCbCr420 / YCbCr444 / YCbCr422) for display compatibility

🖼️ Connection Diagram

cssCopyEdit[Host GPU HDMI] —> [HDMI1 Input]
[Secondary GPU HDMI] —> [HDMI2 Input]
[Fusion Box HDMI Out] —> [Monitor HDMI In]
[Fusion Box DC12V] —> [Power Supply (12V 1A)]

💡 Tip: Use high-quality HDMI 2.0+ cables to ensure full resolution and refresh rate support.

🛠️ Troubleshooting & Tips

🔴 No signal / H1 or H2 light OFF

  • Check cable order and make sure each is fully plugged in

  • Confirm GPU is outputting signal (test directly with monitor)

  • Try swapping HDMI cables

  • Use shorter, high-quality cables

🟡 H1 and H2 ON, but monitor still black

  • Replug HDMI output from Fusion to monitor several times

  • Set correct input source on the monitor (HDMI1/2/DP)

  • Set refresh rate to 60Hz first, then reconnect to Fusion

  • Press K4 to cycle output encoding formats for compatibility

🟢 All lights ON, but no overlay appears

  • Confirm correct HDMI inputs — host and secondary must not be swapped

  • Set secondary PC background to pure black

  • Press K3 repeatedly to increase overlay intensity

🔁 Stuck at 60Hz

  • Set resolution/refresh rate manually in Display Settings (e.g., 1080p@240Hz, 1440p@144Hz)

  • Device will remember settings after reboot

🧪 144Hz issues with 2K monitors

  • Try 2560x1440 at 140Hz instead of 144Hz

  • In GPU control panel, select YCbCr444 format

  • Avoid RGB output if you experience blur or artifacts

🧯 AMD GPU Issues (flicker, color tint)

  • Set color depth to 8 bpc in AMD control panel

  • Use custom resolution of 140Hz if 144Hz causes issues

💻 Laptop/Multiple Monitors as Secondary

  • Works fine with laptops or desktops with multiple displays

  • Use Extended Display Mode

  • Match the resolution of host PC

  • Press K4 if fusion doesn’t appear properly

⚠️ Important Behavior

  • H1 must be ON for the overlay to function. If H2 is ON but H1 is OFF, there will be no display output.

  • Always unplug any DP or HDMI cable directly going from host GPU to monitor while using the Fusion box.

📏 Specifications

Spec
Details

Input/Output

HDMI 2.0 (2 inputs, 1 output)

Supported Resolutions

800×600 up to 3840×2160

Max Refresh Rates

1080p@240Hz, 1440p@144Hz, 2560×1080@165Hz, 3440×1440@100Hz

EDID Support

Yes, automatic passthrough

Device Size

130 × 90 × 35 mm

Packaging Size

220 × 180 × 80 mm

Weight

1kg

Included Accessories

Fusion Box, 12V adapter, 3 HDMI cables (1.5m), warranty card, e-manual

PreviousEDID SpoofingNextKM BOX

Last updated