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F2-5300CL5D-4GBSK 4GB G.Skill DDR2 SO-DIMM PC2-5300 667MHz Dual Channel kit CL5 SK Series w/alu heatsinks
G.Skill Ripjaws 4 Series 4GB DDR4 2666MHz PC4-21300 non-ECC Unbuffered 288p DIMM OEM Desktop Memory F4-2666C15Q-16GRR - Star Micro Inc
G.Skill Aegis 4GB 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-1600C11S-4GIS at Amazon.com