Hynix HYMP512A72CP8D3-S5-AB-C 1GB DDR2-800MHz ECC Fully Buffered DIMM designed for enterprise server deployments requiring registered memory. 240-pin form factor with CAS latency 5, 1.8V operation, and dual-rank configuration provides compatibility with high-end x86 server platforms from the mid-2000s era, including Dell PowerEdge, HP ProLiant, and IBM System x lines. ECC (error-correcting code) ensures data integrity in mission-critical environments; fully buffered design isolates memory controller from DIMM electrical loads, allowing for higher-density configurations. 800MHz speed and 64-bit data width deliver 6.4GB/s peak throughput per module. Typical applications include virtualization hosts, database servers, and 2-socket/4-socket server builds requiring reliable memory with BIOS validation support. Tested and guaranteed; available via quote.