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PNY 8GB 2.666GHz PC4-21300 DDR4 SO-DIMM Unbuffered Non-ECC Laptop Memory Black MN8GSD42666 - Best Buy
8GB RAM Memory for Blue Chip BUSINESSLine Workstation WS3100 240pin PC3-10600 DDR3 DIMM 1333MHz Black Diamond Memory Module Upgrade System Specific Memory - Newegg.com