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Rectangular black metal ATX power supply unit with cooling fan visible on one side

KHACHIMO

KHACHIMO 300W ATX Power Supply L300NM-01

SKU CH-09TS-QXJ39

A 300 W ATX power supply compatible with Dell Vostro 200, 220, 390, 790, 990, 3010, 7010 and 9010 desktops, delivering 80 PLUS Gold efficiency.

  • TypeATX
  • Modern Standby support for near-instant wake from sleep
  • 80 PLUS Gold efficiency reduces power draw and heat output
  • Zero RPM fan mode keeps the unit silent under light loads
  • Resonant LLC topology with DC-to-DC conversion delivers stable, clean power
  • Compatible with Dell Vostro 200, 220, 390, 790, 990, 3010, 7010, 9010

Dell Compatibility

This 300 W ATX power supply is built for Dell Vostro and OptiPlex desktops including the 200, 220, 390, 790, 990, 3010, 7010 and 9010 models. It replaces part numbers L300NM-01, AC300PM-00, H300PM-00 and AC300NM-00. Builders needing higher wattage or a different form factor should look elsewhere.

Thermals and Noise

An 80 PLUS Gold rating keeps efficiency high during typical workloads, reducing waste heat and overall power draw. The Zero RPM fan mode stops the cooling fan completely at low and medium loads, delivering near-silent operation. Resonant LLC topology with DC-to-DC conversion further cuts coil whine for a quieter system.

Sustained Load Behaviour

Under continuous demand the unit maintains stable output thanks to its resonant LLC design and DC-to-DC conversion, which support modern standby states and clean power delivery. The fan engages automatically when thermal thresholds are exceeded, preventing overheating during extended sessions. Efficiency remains consistent across the load range for reliable long-term performance.

Points forts

  • Modern Standby support for near-instant wake from sleep
  • 80 PLUS Gold efficiency reduces power draw and heat output
  • Zero RPM fan mode keeps the unit silent under light loads
  • Resonant LLC topology with DC-to-DC conversion delivers stable, clean power
  • Compatible with Dell Vostro 200, 220, 390, 790, 990, 3010, 7010, 9010

Caractéristiques

TypeATX

Questions sur cet article

How do I install this 300W ATX unit into a Dell Vostro 200, 220, 390, 790, 990, 3010, 7010 or 9010 and what step is often missed?

Fit the supply into the chassis, secure the four mounting screws, then connect the 24-pin ATX and 4-pin CPU power cables; the step often missed is plugging the 4-pin CPU connector near the socket.

What maintenance or replacement will this PSU need over time?

The 80 PLUS Gold certified unit has no user-serviceable parts; only periodic dust removal from the intake grill is needed, and the entire supply is replaced if voltages drift out of spec.

What limit appears first when this 300W supply runs at sustained load?

The 300W continuous power rating is the first limit; exceeding it triggers over-power protection and shuts the unit down.

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