The IBM 5564 is a high-performance, capacity-upgrade-on-demand (CUoD) memory module designed for IBM's POWER7 servers. This memory kit includes four 64GB DDR3 DIMMs, operating at a speed of 1066MHz. The CUoD feature allows businesses to initially install the memory without activating its full capacity, enabling them to purchase additional memory capacity only when needed. This can significantly reduce initial costs while providing a straightforward path for future upgrades. The DDR3 technology offers high-speed data transfer rates and improved power efficiency over previous DDR versions, making these DIMMs well-suited for demanding applications and environments where power consumption and heat output are concerns. As enterprises grow and their data processing needs evolve, the IBM 5564 memory kits offer an efficient and cost-effective way to scale system performance.