Kingston’s KHX6400D2K2/2G is a kit of two 128M x 64- bit 1GB (1024MB) DDR2-800 CL5 SDRAM (Synchronous DRAM) memory modules, based on sixteen 64M x 8-bit DDR2 FBGA components per module. 

Total kit capacity is 2GB (2048MB). 

Each module pair has been tested to run at DDR2 800MHz at low latency timing of 5-5-5-15 at 2.0V. 

The SPD is programmed to JEDEC standard latency 667Mhz timing of 5-5-5-15 at 1.8V. 
Each 240-pin DIMM uses gold contact fingers and requires +1.8V. T