Transcend JetRam 2 GB 204-Pin DDR3 SO-DIMM 1600 MHz (PC3-12800) Laptop Memory Module JM1600KSN-2G 204PIN DDR3 1600 MHz SO-DIMM 2048MB with 256Mx8; CL11 JEDEC standard 1.5V  0.075V Power supply Clock Freq: 800MHZ for 1600Mb/s/Pin. Programmable /CAS Write Latency (CWL) =8 Serial presence detect with EEPROM 204PIN DDR3 1600 MHz SO-DIMM 2048MB with 256Mx8; CL11 JEDEC standard 1.5V  0.075V Power supply Clock Freq: 800MHZ for 1600Mb/s/Pin. Programmable /CAS Write Latency (CWL) =8 Serial presence detect with EEPROM RoHS compliant products. Bi-directional Differential Data-Strobe; Internal calibration through ZQ pin Limited Lifetime Warranty