DELL Inspiron 14 5485 15 5585 Motherboard AMD Ryzen 5 3500 2.1GHz FNM6F

Direct replacement for Inspiron 14 5485 and 15 5585

This genuine Dell OEM motherboard carries the FNM6F part number and fits both the 14-inch 5485 and 15-inch 5585 chassis. It ships new with an integrated AMD Ryzen 5 3500 quad-core processor clocked at 2.1 GHz. The board is intended for owners restoring a failed unit or technicians performing board-level service on these specific models.

Sustained workload behaviour

The soldered Ryzen 5 3500 and built-in Radeon Vega graphics share the same thermal envelope, so clock speeds settle to a steady state under prolonged compute or media tasks. DDR4 memory support keeps data throughput consistent during extended multitasking sessions. The fixed CPU configuration means performance ceiling is defined by the 3500 silicon rather than a replaceable module.

Thermals, noise and power draw in normal use

Cooling performance depends entirely on the original laptop fan and heatsink assembly attached to this board. Power consumption follows the 3500 TDP profile, so battery runtime and acoustic output remain comparable to the factory configuration. No additional power circuitry is present beyond the standard Dell implementation for these Inspiron platforms.