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Silver rectangular metal internal ATX power supply unit

DELL

DELL 1N405Product 180 W ATX power supply

SKU CH-986S-Z5RCT MPN 1N405Product

Internal 180 W ATX power supply compatible with Dell Dimension 4300S and 4500S and OptiPlex GX60, GX240 and GX260 desktops

  • Plug typePower Supply
  • 180 W output powers compatible Dell desktops
  • Internal ATX form factor fits Dimension 4300S and 4500S
  • Direct replacement for Dell OptiPlex GX60, GX240, GX260
  • Genuine Dell part 1N405 ensures correct pinouts
  • New condition supplies reliable power from day one

Genuine Dell 180 W ATX power supply

The Dell 1N405 is a new, internal ATX power supply rated at 180 W output. It is built to the original equipment specification for Dell Dimension and Optiplex desktop PCs.

Direct replacement for legacy Dell desktops

This unit matches the factory form factor and connector layout for Dimension 4300S and 4500S models plus Optiplex GX60, GX240 and GX260 systems. Installing the authentic part restores the original power delivery without adapter cables or case modifications.

Suits owners of the listed Dell models only

Buyers repairing a Dimension 4300S, 4500S or Optiplex GX60, GX240, GX260 can use this supply as a like-for-like swap. Builders assembling a custom chassis, upgrading to modern components or needing higher wattage for discrete graphics should select a standard ATX unit with the required capacity and connectors.

How it compares

Measured against everything we stock in Switch Modules, Transceivers & Add-Ons, at today’s prices. Recalculated every night.

Price $89.99
Pricier than about 58% of the 1,517 comparable items (median $68.99).

Specifications

Product
Brand nameDell
Power
Plug typePower Supply

Questions about this item

Will the internal fan on this 180 W ATX unit need periodic cleaning or replacement?

The power supply uses an internal cooling fan; dust buildup can reduce airflow, so cleaning the intake vents every few months helps maintain reliable operation.

What is the first limit reached when the Dell 1N405 runs continuously at full load?

The 180 W output rating is the primary limit; sustained draw above that level will trigger the unit's protection circuitry.

How much heat and noise does this supply produce during all-day operation in a Dimension 4500S?

At typical loads the fan runs at low speed, keeping noise modest while exhausting warm air through the rear grille.

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