 "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" 
 "Ballistix Sport - DDR4 8 GB DIMM 288-pin" " Ballistix 288-pin BLS8G4D240FSA System Memory (RAM) CDW.com
"Speed. Style. Sport. Get more out of your memory. Designed for performance enthusiasts and anyone who simply wants to get more out of their system, Ballistix Sport memory helps you do just that. Compared to standard PC memory, Ballistix Sport delivers faster speeds, lower latencies, and increased bandwidth for affordable and seamless performance. With easy plug-and-play installation, certified Intel XMP profiles for easy configuration, and an integrated heat spreader to control memory temperatures, Ballistix Sport delivers more. Give your processor the resources it needs to win, and make your computer faster and more responsive.BLS8G4D240FSA is a 8GB DDR4 desktop module that operates at speeds up to 2400 MT/s and has a CL16 latency. It is an Unbuffered DIMM. It conforms to the industry standard DDR4 UDIMM layout of 288 pins and is compatible with systems that take DDR4 2400MT/s UDIMM memory." 