What RAM does the Dell OptiPlex 5060 SFF support?

The Dell OptiPlex 5060 SFF runs DDR4-2666 with a 32 GB limit via two SO-DIMM slots. It uses DDR4 non-ECC at 2666 MHz, with a 32 GB ceiling through 2×16 GB sticks. This is the same RAM config as the 3060 SFF — adequate for business desktop use, but nothing special.