4gb 2rx8 Memory Card For Macbook Pro For Hynix Ddr3 Pc3 - 12800s - 11 -11 - F3 1600 M471b5273dh0 - Ck0 - Rams - AliExpress
4GB Memory Upgrade for MacBook Pro, iMac, and Mac mini
CORSAIR 8GB (2 x 4GB) 204-Pin DDR3 SO-DIMM DDR3 1066 (PC3 8500) Memory for Apple Model CMSA8GX3M2A1066C7 - Newegg.com
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Mac Pro Memory for Model 5.1 | DDR3 1333MHz | 4GB | MacMemory.com