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Rectangular black metal ATX power supply unit with cooling fan and cable bundle

KHACHIMO

KHACHIMO OptiPlex 760 780 MT 305W Power Supply

SKU CH-ESFE-2T456

A 305 W ATX unit built for OptiPlex 760 and 780 MT chassis, delivering 80 PLUS Gold efficiency, zero-RPM fan silence and Modern Standby wake speeds

  • TypeATX
  • Faster wake-from-sleep with Modern Standby support
  • Lower power draw thanks to 80 PLUS Gold efficiency
  • Near-silent operation at low loads via Zero RPM fan mode
  • Clean, stable power delivery through resonant LLC topology with DC-to-DC conversion
  • Reduced coil whine for quieter overall system acoustics

Compatible Dell OptiPlex Replacement

This 305W ATX power supply is built for Dell OptiPlex 760 and 780 mini-tower systems. It matches the original AC305AM-S0, L305E-S0, AC305E-S0 and FSA029 part numbers. The unit delivers 80 PLUS Gold certified efficiency for lower running costs and cooler operation.

Upgrade From Standard OEM Units

It replaces the factory 305W PSU when the original unit fails or becomes noisy. The jump is worth it if you need Modern Standby support for faster wake-from-sleep times. Resonant LLC topology with DC-to-DC conversion provides cleaner power and reduces coil whine compared to older designs.

Suits OptiPlex 760 And 780 MT Owners

This unit suits owners of those specific mini-tower models who want a new, efficient replacement with a semi-passive fan mode. It is not for small-form-factor or ultra-small-form-factor OptiPlex chassis. Builders needing higher wattage for discrete graphics upgrades should look at something else.

Highlights

  • Faster wake-from-sleep with Modern Standby support
  • Lower power draw thanks to 80 PLUS Gold efficiency
  • Near-silent operation at low loads via Zero RPM fan mode
  • Clean, stable power delivery through resonant LLC topology with DC-to-DC conversion
  • Reduced coil whine for quieter overall system acoustics

Specifications

TypeATX

Questions about this item

Does the 305 W ATX unit fit the Dell OptiPlex 760 and 780 MT chassis?

Yes, it is built as a direct replacement for those tower models and uses the standard ATX form factor.

What is the main installation step people miss when swapping the PSU in an OptiPlex 760 or 780 MT?

Reconnect the 4-pin CPU power cable near the socket; the board will not post without it.

When should the cooling fan be cleaned on a unit with Zero RPM Fan Mode?

Clean the intake vents once a year, or more often in dusty rooms, to keep airflow clear when the fan does spin.

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