 "Crucial - DDR3 8 GB DIMM 240-pin" " Crucial 240-pin CT102464BD186D System Memory (RAM) CDW.com
"Expand the memory of your laptop with the Crucial System Memory. Ensure lag-free functioning and efficient multitasking by upgrading you system with this 8 GB DDR3 SDRAM. With Non-ECC parity and a CAS latency of CL13, it reduces delay and enables quick loading of programs. It is compatible with motherboards having DIMM 240-pin slots and DDR3-enabled chipset. Working at a supply voltage of 1.35 volts, this unbuffered system memory delivers an energy-efficient performance.8 GB RAM for PC to improving your system functionalityHigh data transfer rate with a memory speed of 1866 MHz" 
 "4GB DDR3 1600 CL11 UDIMM 240 SINGLE" SINGLE | Tradineur.com"
"Capacidad total: 4 GB; Frecuencia (Bus clock rate): 1.600 MHz; Tecnología: DDR3 tft; Kit: No; Tipología: DIMM analogico; Generica: Sí" 