512 MB PC400 C2.5 DDR RAMMODEL: KVR400X64C25/512 VENDOR: KINGSTON VALUE RAM FEATURES: PC400 DDR DRAM- 512MB 184-pin (DDR) Double Data Rate DIMM module Clock Level 2.5 PC3200 400 MHz. Providing 3x the throughput of SDRAM DDR memory s high performance comes from its ability to perform two data operations in one clock cycle. MANUFACTURER WARRANTY:nbsp;nbsp;LIFETIME