Dell has made the Latitude line relatively serviceable. Follow these steps carefully to upgrade your memory.
For the best performance, it is highly recommended to install memory in matched pairs (e.g., two identical 16 GB sticks) to enable dual-channel mode , which increases the data transfer rate between the RAM and processor. Step-by-Step Upgrade Guide dell latitude 5430 memory upgrade
To quantify the upgrade, let's look at a benchmark comparison on a Latitude 5430 (i5-1235U processor). Dell has made the Latitude line relatively serviceable