Thunderbolt 4 distinguishes itself from Thunderbolt 3 by setting higher minimum performance standards, including support for two 4K displays or one 8K display, PCIe at 32 Gbps for storage speeds up to 3,000 MB/s, and universal cable connectivity for docks with up to four Thunderbolt 4 ports. While maintaining the same maximum data transfer rate of 40Gbps, Thunderbolt 4 ensures a more consistent and versatile user experience across all devices.

Thunderbolt 4 enhances device connectivity by offering a universal solution that combines data transfer, video output, and charging capabilities into a single compact port. It supports daisy-chaining up to six devices, provides docks with multiple Thunderbolt ports, and ensures compatibility with a wide range of protocols, including Thunderbolt 3, USB4, and earlier USB standards, facilitating a seamless connection ecosystem.

Thunderbolt 4 introduces enhanced security features, including mandatory Intel VT-d-based direct memory access (DMA) protection, which helps prevent physical DMA attacks on Thunderbolt devices. This security measure ensures that all Thunderbolt 4 certified devices provide higher protection for user data.

Yes, Thunderbolt 4 is fully compatible with USB4, offering a unified interface that supports the latest USB standard. This compatibility ensures that devices equipped with Thunderbolt 4 can connect to USB4 devices and vice versa, providing users with extensive flexibility and interoperability between devices and accessories.