 "HyperX Impact Black Series - DDR3L 8 GB SO-DIMM 204-pin" " HyperX 204-pin HX316LS9IB/8 System Memory (RAM) CDW.com
"HyperX Impact memory boasts the world's fast SO-DIMM frequency - 2666 MHz - to keep you ahead of the curve and level up your game. It automatically recognizes the platform it's plugged into and auto overclocks to the high frequency published with no need to adjust system BIOS settings. So you get extreme performance that supports notebooks and other small form factor systems using either AMD or the Intel CPU technologies with no hassle at all - even if you're a newbie." 
 "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" 