GAMEMAX GMX V1.4 PWM PASSIVE SPLITTER

1. Input Requirements

1-1. Input Voltage

The power supply interface is SATA. The SATA allows positive and negative connections.

2. Functional Description

2-1. Fan control

The fan is driven by a PWM signal from the motherboard. FAN1 includes a speed detection function, which must be connected if the fan speed is to be displayed in the computer's BIOS. The fan speed is controlled by the PWM signal from the main board. Fans with a sense function should be connected to FAN1 for speed display in the motherboard's BIOS. FAN 1-5 are compatible with 3PIN and 4PIN connectors and support speed change functions.

2-2. Automatic Fan Speed Adjustment

The controller can automatically adjust fan speed. To configure this, navigate to the Fan Function option in the BIOS:

• A. Select the appropriate fan interface (e.g., CPU, SYS-FAN1, SYS-FAN2), which may vary by manufacturer.
• B. Choose a speed mode (e.g., normal, silent, performance, full speed, custom), which may vary by manufacturer.
• C. Select DC mode. Both PWM and DC options may be available in the BIOS; DC mode should be selected for this controller's functionality.
• D. If the default or PWM mode is selected in the BIOS, the fan speed regulation function will not be active, and the fan will operate at its highest speed.
• E. Motherboards from different manufacturers have varying fan interface drive capabilities. It is recommended to connect a maximum of 5 fans to this controller.

2-3. FAN 1-5 Speed Change Functionality

The speed change function for FAN 1-5 can be achieved without connecting the SATA power supply.

2-4. FAN 6-8 Operation

FAN 6-8 require a SATA connection to operate and maintain maximum speed. Their speed cannot be adjusted.

2-5. Short Test Mode

When no PWM cable is connected, plugging in the SATA power supply and connecting the TEST connector with a shorting cap allows FAN1-5 to operate at full speed. This short test is for demonstration purposes only. The test cap must be removed before connecting the PWM to the motherboard to prevent potential damage.

Diagram: Connection Flowchart

A flowchart illustrates connection and operation paths: 'Setup BIOS' can lead to 'Connect PWM' for 'FAN1-5' enabling 'Auto Operation'. Alternatively, 'Connect SATA' for 'FAN6-8' provides 'High Speed'. A 'Short TEST' to 'FAN1-5' also achieves 'High Speed' for demonstration.

3. Connection Mode

The splitter features a SATA power input for power delivery. It connects to the motherboard via a PWM-IN header for fan speed control signals. Multiple fan headers (FAN1-FAN8) are available for connecting fans. A TEST header is also present for specific testing scenarios.

Diagram: Physical Layout

The physical layout of the splitter board shows a SATA power input, eight fan headers (FAN1-FAN8) for 3-pin/4-pin fans, a 'PWM-IN' header for motherboard control signals, and a 'TEST' header for specific testing configurations. The board is labeled 'GMX PWM V1.4' and connects to the motherboard (MB) via the 'PWM-IN' header.

4. Physical Dimension

The physical dimensions of the splitter board are 70mm in length and 35mm in width. The unit of measurement is millimeters (mm).

Diagram: Physical Dimensions

The splitter board measures 70mm in length and 35mm in width, as indicated by dimension lines and the unit 'mm'.