Corsair CMK4GX4M1A2400C16 Vengeance LPX 4GB (1 x 4GB) DDR4 DRAM 2400MHz (PC4-19200) C16 Memory Kit Black CMK4GX4M1A2400C16 | Fast Server Corp. www.srvfast.com
CORSAIR Vengeance LPX 8GB (2 x 4GB) 288-Pin PC RAM DDR4 2400 (PC4 19200) Memory Kit Model CMK8GX4M2A2400C14 - Newegg.com
Corsair CMSA4GX3M1A1066C7 Apple Certified 4GB (1x4GB) DDR3 1066 MHz (PC3 8500) Laptop Memory 1.5V at Amazon.com