This one is kinda odd. I have an Acer E5-574-58JM laptop that uses DDR3L memory. A while back, I replaced one module with an 8GB module CT102464BF160B. (Crucial website tool says it's compatible.) With the new module it worked fine as far as I could tell when I was plugged into the wall, but as soon as it unplugged it usually did an immediate (or almost immediate) hard shutdown. When I removed the new module and put the original module back in, it worked fine, even after I unplugged the main power. I'm pretty sure I also tried each variation swapping in and out of both of the memory slots, but this was a while back. What might be causing this? I have this theory, probably crazy, that perhaps this module isn't actually working properly at the rated 1.35v low voltage that the DDR3L designates, and instead might only be a regular DDR3 1.5v part. And when it's plugged in it doesn't matter, because the laptop can deliver that when it's plugged in. But when it's unplugged the laptop invokes power savings, and boom, down it goes.
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