I recently bought a new ultrabook that came with 4GB of ram. I have seen people talk about how it can be upgraded to 8GB with no trouble. However when I look up the CPU that is inside of the machine it says it can support 16GB of ram. The actual CPU is an Intel Core i5-4202Y.
So my question is this. If Intel says that the CPU can address that much memory and all CPUs now have integrated memory controllers then what would stop me from putting more RAM in the machine beyond what I have seen people add?
Could the manufacturer have tweaked the firmware in some way?
