32GB SODIMM (2x16GB) 1.35V PC3L-12800 DDR3L 1600MHz for Lenovo Z51 5th GEN i7 (3rd Party) - Walmart.com
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Can I replace my Lenovo Z51-70 CPU? It's an i7-5500U which is very bad at multitasking. Can I replace the processor or the motherboard with a higher processor? - Quora
CMS 16GB (2X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Z Series Z51-70 - A7 at Amazon.com
Lenovo YOGA 500-15ISK - i7-6500U · NVIDIA GeForce 940M (2GB DDR3) · 14.0”, HD (1366 x 768), TN · 512GB SSD · 8GB DDR3, 1600Mhz · Windows 10 Home | LaptopMedia.com