The jm1600ksn 4g is a 512m x 64bits ddr3 1600 so dimm the jm1600ksn 4g consists of 16pcs 256mx8bits ddr3 sdrams fbga packages and a 2048 bits serial eeprom on a 204 pin printed circuit board the jm1600ksn 4g is a dual in line memory module and is intended for mounting into 204 pin edge connector sockets synchronous design allows precise cycle control with the use of system clock data io transactions are possible on both edges of dqs range of operation frequencies programmable latencies al