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Rectangular ATX power supply unit in matte black finish with rear fan grille and side label

KHACHIMO

KHACHIMO OptiPlex XE 486 745 755 280W Power Supply

SKU CH-B0PF-4XNDS

An ATX power supply delivering 280 watts with 80 PLUS Gold efficiency, zero RPM fan mode and Modern Standby support for Dell OptiPlex XE, 486, 745 and 755 systems

  • Product typeATX
  • Fast wake-from-sleep with Modern Standby support
  • High efficiency from 80 PLUS Gold certification
  • Near-silent operation via Zero RPM fan mode
  • Clean, stable power from Resonant LLC with DC-to-DC conversion
  • Compatible with OptiPlex XE 486 745 755 systems

Dell OptiPlex Compatibility

This 280W ATX power supply is designed as a direct replacement for Dell OptiPlex XE, 486, 745 and 755 systems. It matches the original L280E-01, KD98N, Y738P, D499R, D280ES-00 and DPS-280MB A part numbers for a straightforward swap.

80 PLUS Gold Efficiency

The unit carries 80 PLUS Gold certification, delivering high efficiency that reduces power consumption, heat output and acoustic noise. Resonant LLC topology with DC-to-DC conversion provides clean, stable power and helps minimise coil whine.

Office and Home Upgrades

Ideal for IT teams refreshing legacy OptiPlex fleets or home users restoring a vintage desktop. Modern Standby support enables rapid wake-from-sleep. Builders needing higher wattage for discrete graphics or non-Dell chassis should look elsewhere.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $243.99
Pricier than about 71% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

What does the 280 W rating mean for a Dell OptiPlex XE, 486, 745 or 755 system?

It is the maximum continuous DC output the unit can deliver to the motherboard, drives and expansion cards in those OptiPlex models.

Which ATX power standard does this supply implement and what sleep states does it enable?

It follows the ATX specification with Modern Standby support, allowing the PC to enter very low-power sleep and wake almost instantly.

Will this PSU fit the standard chassis used by the OptiPlex XE, 486, 745 and 755?

Yes, it uses the regular ATX form factor and the original Dell part numbers L280E-01, KD98N, Y738P, D499R, D280ES-00 and DPS-280MB A, so it mounts directly in those cases.

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