Hard to know... Dell PCs can be fussy about RAM.

Your system takes 2 RAM modules. What's installed now, one or two modules, and what size(s)?

What are you plans?

1. Install this module to replace RAM module(s) already installed? Always better to install RAM in matched pairs so they can use dual-channel mode.
   
   
2. Add this 1x 16 GB module to a 1x 16 GB module that's already installed? Not a good idea to mix RAM modules from different manufacturers.

Here's RAM that's guaranteed to be compatible or they take it back, but still better not to mix it with RAM from a different manufacturer.

@wayne008 

That looks like HIGH Density X16 ram. It will slow down your system. You have 2 slots so you should use pairs. inspiron 27 7775 aio_service PDF

inspiron 27 7775 aio servicemanual

https://www.youtube.com/watch?v=R7CO9v9rpOk

Ct2k16g4sfd8266 ct10546425

Low Density Ram works best