Thunderbolt 4 does this by creating virtual memory for every connected device by blocking access to system-wide memory. It also has Direct Memory Access (DMA) protection, which can physically prevent DMA attacks. Thunderbolt 4 allows you to wake your laptop from sleep mode by using an external keyboard or mouse that’s connected via the Thunderbolt 4 port. Because of its versatility, you can argue that Thunderbolt 4 is the only connection type one needs. You can charge many different devices with Thunderbolt 4, including smartphones, tablets and even some laptops. Thanks to its high bandwidth capacity, Thunderbolt 4 allows you to connect two 4K 60Hz monitors or a single 8K 60Hz monitor. With a minimum PCIe data requirement of 32Gbps, Thunderbolt 4 delivers better performance and high transfer rates. Thunderbolt 4 is compatible with PCIe, DisplayPort and USB4 and is backward compatible with older iterations of Thunderbolt via USB-C connection. You can also connect up to five Thunderbolt devices to a single PC. Thunderbolt 4 has a maximum bidirectional bandwidth of 40Gbps and is four times faster than USB 3.2 Gen 1. A single Thunderbolt 4 cable connection is capable of high-speed data transfers powering and charging devices and displaying video to external monitors. Intel announced Thunderbolt 4 during CES 2020 and released the final specification in July of that year.
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