How to Upgrade Soldered RAM 8GB to 16GB on MacBook Pro (Touch Bar) - YouTube
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How to Replace Soldered RAM on MacBook Air (13-inch, Mid 2012) - YouTube
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X1 Extreme Expansion Opportunities - No Soldered RAM in this X1 - Every single X1 Extreme will accept 4TB NVMe + 64GB DDR4 RAM whenever you are ready regardless of what it