ASUS ThunderboltEX 4 interface cards/adapter Internal Mini DisplayPort, PCIe, Thunderbolt, USB 2.0, USB 3.2 Gen 2 (3.1 Gen 2)

The ASUS ThunderboltEX 4 is a PCIe add-on interface card that brings Thunderbolt 4 connectivity to compatible Windows 10 x64 PCs. Equipped with the Intel Thunderbolt 4 JHL8540 chipset, the card offers up to 40 Gbps bi-directional bandwidth, support for USB4™ devices, and DisplayPort™ 1.4 passthrough. It installs into a standard PCIe slot and provides a USB-C port capable of up to 100 W laptop charging, plus compatibility with Mini DisplayPort and legacy USB interfaces.

Advantages

The card provides high-bandwidth 40 Gbit/s data transfer, multi-monitor DisplayPort 1.4 support via Thunderbolt, and compatibility with USB4 and USB 3.2 Gen 2 devices. It supports daisy-chaining up to five Thunderbolt devices and integrates into existing PC builds through a PCIe host interface. Its compact form factor and black finish make it a versatile expansion option for systems that need additional I/O.

Suitable for

• Connecting high-speed external storage and Thunderbolt peripherals
• Driving external displays using DisplayPort 1.4 over Thunderbolt
• Adding USB4/USB-C charging and data to a desktop PC
• Users who require daisy-chaining multiple Thunderbolt devices

Key specifications

• Host interface: PCIe
• Chipset: Intel Thunderbolt 4 JHL8540
• Maximum bandwidth: 40 Gbit/s (bi-directional)
• Output interfaces: USB 3.2 Gen 2, USB 2.0, Thunderbolt, mini DisplayPort
• Display support: DisplayPort 1.4
• Charging: Up to 100 W via USB-C
• Compatibility: Windows 10 x64
• Dimensions: 117.7 mm (W) x 180.5 mm (D)
• Product colour: Black

How to use

Power down the PC and install the ASUS ThunderboltEX 4 into an available PCIe slot following the motherboard and card installation guidelines. Connect the card’s internal header to the compatible motherboard header if required by your board. After booting into Windows 10 x64, install any necessary drivers provided by ASUS or through Windows Update, then connect Thunderbolt, USB-C, or Mini DisplayPort devices to the card's external port for data, display, or power delivery.

Recommendations

For reliable performance, use certified Thunderbolt cables and ensure your motherboard supports Thunderbolt headers and the required firmware. When connecting high-power devices, verify that your system power supply and the card’s 100 W charging capability meet device requirements.