This is a 256GB server/workstation memory kit from Kingston's FURY Renegade Pro line — four 64GB DDR5 ECC Registered (RDIMM) modules running at DDR5-6400 with CL32 timings. ECC Registered memory is designed for workstation and server motherboards rather than consumer desktops: the buffered/registered design lets high-density modules run reliably at high speed, and ECC (error-correcting code) protects against memory-bit errors during long-running, data-critical workloads. EXPO support means the kit carries AMD's memory overclocking profile (Expo, AMD's equivalent to Intel XMP) for one-click tuning on compatible AMD Threadripper/EPYC workstation platforms, alongside standard JEDEC compatibility elsewhere. A 256GB kit at DDR5-6400 is aimed squarely at high-end content creation, virtualisation, simulation, and other memory-bandwidth-hungry workstation or small-server use, not mainstream desktops.