GDDR6X (Graphics Double Data Rate 6X) is an advanced type of video RAM (VRAM) used in high-end graphics cards for gaming and professional applications. It offers significant improvements over GDDR6, utilizing PAM4 signaling to achieve higher data transfer rates, up to 19 to 21 Gbps per pin. This results in increased memory bandwidth and enhanced performance, enabling faster rendering, smoother gameplay, and more efficient handling of complex graphics and computational tasks. GDDR6X provides superior performance and efficiency, making it ideal for cutting-edge GPUs in the latest gaming systems and professional workstations.