ASRock AMD Radeon RX 7900 XTX Phantom Gaming Graphics Card User Manual

3.1. System Requirements

• PCI Express-compliant motherboard with one x16 graphics slot.
• Minimum 750W power supply with three available 8-pin PCIe power connectors.
• Minimum 16GB system memory (32GB recommended).
• Compatible operating system (Windows 10/11 64-bit recommended).
• Sufficient space within your PC case for the card dimensions (12.99 x 5.51 x 0.1 inches).

3.2. Installation Steps

1. Prepare Your System: Power off your computer and unplug all cables. Open your PC case.
2. Remove Old Graphics Card (if applicable): Unscrew any retaining screws, unclip the PCIe retention clip, and carefully remove the old graphics card.
3. Install New Graphics Card: Align the ASRock RX 7900 XTX with the PCIe x16 slot on your motherboard. Press down firmly until it clicks into place. Secure the card with retaining screws.
4. Connect Power Cables: Connect three 8-pin PCIe power cables from your power supply to the corresponding ports on the graphics card. Ensure a secure connection. The card features LED indicators next to the power connectors that will light up if cables are plugged in incorrectly.
5. Close Case and Connect Displays: Close your PC case. Connect your display(s) to the graphics card using DisplayPort 2.1 or HDMI 2.1 cables.

Figure 3: Exploded view illustrating the internal structure, cooling system, and the location of the 3x 8-pin power connectors on the ASRock RX 7900 XTX graphics card.

Figure 4: Rear view of the graphics card, detailing the three DisplayPort 2.1 and one HDMI 2.1 output ports for display connectivity.

4.1. Driver Installation

After physical installation, power on your computer. Windows should detect the new hardware. Download and install the latest AMD Radeon drivers from the official ASRock or AMD website. Follow the on-screen instructions for a complete installation. It is recommended to perform a clean installation of drivers, especially if upgrading from a different GPU brand.

4.2. Performance and Silent Modes

The ASRock RX 7900 XTX features a dual BIOS switch, allowing you to select between "Performance" and "Silent" modes. This switch is located on the side of the card, near the power connectors. The "Performance" mode prioritizes maximum clock speeds and cooling, potentially resulting in higher fan noise. The "Silent" mode optimizes for quieter operation by reducing fan speeds and slightly adjusting clock profiles, with minimal impact on overall performance.

Figure 5: The metal backplate of the graphics card, indicating the location of the dual BIOS switch for selecting between Performance and Silent modes.

4.3. Polychrome SYNC RGB Lighting

The graphics card supports Polychrome SYNC for customizable RGB lighting. Use the ASRock Polychrome SYNC software or compatible third-party RGB control software (e.g., Razer Chroma) to personalize the lighting effects and synchronize them with other compatible components in your system.

6.1. No Display Output

• Ensure all power cables (three 8-pin PCIe) are securely connected to the graphics card and power supply. Check the LED indicators on the card.
• Verify that your display cable is correctly connected to both the graphics card and the monitor.
• Confirm that your monitor is set to the correct input source.
• Try a different display cable or port on the graphics card.

6.2. Driver Issues (e.g., Code 43)

• Completely uninstall existing graphics drivers using a utility like Display Driver Uninstaller (DDU) in Windows Safe Mode.
• Reboot your system and install the latest drivers downloaded directly from the ASRock or AMD website.
• Ensure your motherboard BIOS is updated to the latest version.

6.3. Overheating or Excessive Fan Noise

• Check your PC case's airflow. Ensure intake and exhaust fans are properly configured and not obstructed.
• Clean any dust accumulation on the graphics card's heatsink and fans.
• Consider switching to "Silent" mode using the dual BIOS switch if fan noise is a concern during lighter workloads.
• Monitor GPU temperatures using software like AMD Radeon Software. If temperatures consistently exceed safe limits (e.g., GPU Hot Spot above 100°C), ensure proper installation and cooling.