Kingstons KHX6400D2K2/1G is a kit of two 64M x 64-bit (512MB) DDR2-800 CL5 SDRAM (Synchronous DRAM) memory modules, based on eight 64M x 8-bit DDR2 FBGA components per module. Total kit capacity is 1GB (1024MB). Each module pair has been tested to run at DDR2 800MHz at low latency timing of 5-5-5-15