The ASUS PN41 has one RAM slot — 16 GB is your ceiling

The ASUS PN41 has one RAM slot — 16 GB is your ceiling

Single slot, single channel, 16 GB max. There’s no dual-channel here, no expansion later. The PN41 uses DDR4 SO-DIMM, and with only one slot you’re stuck at whatever you install at build time. Fine for a lightweight kiosk or thin client, but don’t expect to run anything memory-hungry.