The ASUS PN51's Ryzen 5000 processor is soldered to the board

The ASUS PN51 runs AMD Ryzen 5000 series mobile processors — Ryzen 3 5300U, Ryzen 5 5500U, or Ryzen 7 5700U — but they’re soldered BGA chips. What you order is what you’re stuck with, so choose your CPU tier carefully upfront.