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I currently have 6GB DDR3 666MHz, worth upgrading? - CPUs, Motherboards, and Memory - Linus Tech Tips
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ASUS CDM CS-B/CDM/SI Socket 1150 Motherboard DDR3 16gb SDRAM 666MHz For Intel Core i5-4590 cpus Intel Q87 C2 Windows 10 Gadgets - Newegg.com
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CT25664AA667.M16FH | Crucial 2GB PC2-5300 DDR2-666MHz non-ECC Unbuffered CL-5 256M x 64 240-Pin DIMM Memory Module
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