Question Upgrading RAM from 8GB to 16GB

i would highly advise just going with a 2x8GB dual-channel kit instead. Unless you can ensure the RAM features the same exact same ICs, there's no 100% guarantee it'll work. However, if you are running a JEDEC kit of RAM, there's a much higher chance of another stick working either way because you aren't overclocking with an XMP profile. (so the risk is up to you)

Then all you need is a 3200MHz CL22 kit of RAM. Don't bother spending more money on lower CL memory with a XMP kit, unless your laptop can actually support XMP profiles.