DELL G3 specs…..You need a pair of sticks, 3200 will probably work but may cost more, 2 x 16 looks like the max
Slots: Two SODIMM
Type: Dual-channel DDR4
Speed: 2666MHz
Configurations supported:
Per memory module slot: 4 GB, 8 GB, and 16 GB
Total memory: 4 GB, 8 GB, 12 GB, 16 GB, and 32 GB