LPDDR4X is a type of low-power double data rate (LPDDR) memory designed for mobile devices like smartphones and tablets. It offers improved energy efficiency compared to its predecessor, LPDDR4, allowing devices to run longer on a single charge while maintaining high performance. This memory technology supports faster data transfer rates, reaching up to 4266 MT/s (megatransfers per second). LPDDR4X also features a lower voltage requirement, which helps reduce power consumption, making it ideal for battery-operated devices that need to balance performance and energy efficiency.