Argent Caches are containers holding Argent Cells which can be found by the player. Each yields one Argent Cell which can upgrade the Praetor Suit's three subsystems, increasing Health, Armor, and Ammo capacity respectively. Once all of the argent caches have been acquired, the player can have a maximum of 150 armor, 200 health, and varying amounts of ammo depending on the weapon.

Doom 2016 Argent Cache

An argent cache in-game.