DDR3 1600mhz 1.5v not detected on asusX550LD

[abhinav8045]

I bought 4gb ddr3 1.5v ram corsair valueselect 1600mhz for my laptop which is having a 4gb soldered ram to my motherboard. I just have one slot to add ram. clock also matched as 11 11 11 28 but it is not adding up.Cpu-z shows ram in slot1 but total memory it is showing is 4gb. Do help please.

 

[Lutfij]

Is it possible to share your SKU number for your Asus mobile computing device alongside the OS you're on at the moment? Based off of information, on the product's specifications page, the unit supports a maximum of 4GB but Crucial states that the maximum ram is 12GB's.

It'd be a good idea if you could share the stickered information for the ram you've purchased as well as the information shown in CPU-Z. These two site:
https://www.ramcity.com.au/upgrade/asus/x-series-notebook/x550ld/134022
https://www.mrmemory.co.uk/memory-ram-upgrades/asus/laptop/x550ld
state the same story of your unit supporting a maximum of 12GB's of ram when paired with the onboard memory module.