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Rectangular metal PSU with 24-pin and 4-pin ATX plus SATA power connectors

myVolts

myVolts 250W power supply for Dell Optiplex 390 790 990 3010

SKU CH-XZB7-AJCXS

250 W AT power supply with 24-pin ATX, 4-pin ATX and SATA connectors for Dell Optiplex 390, 790, 990, 3010 and compatible Inspiron, Vostro and Studio slim desktops

  • TypeAT
  • 250 W maximum output powers compatible Dell desktops
  • 100-240 V AC input works worldwide without a voltage switch
  • 24-pin ATX plus 4-pin CPU connectors feed motherboard and processor
  • Two SATA power leads drive storage and optical devices
  • Replaces multiple OEM part numbers including D250AD-00 and 7GC81

250W PSU for Dell Optiplex and Slim Desktops

This replacement power supply delivers 250W maximum output for Dell Optiplex 390 790 990 3010, Inspiron 530s 540s 545s 546s 560s 570s 580s 620s, Vostro 200s 220s 230s 260s 400s and Studio 540s 537s 560s Slim Desktop DT Systems. It accepts 100-240V AC input at 4.4A across 50-60Hz. The unit matches model numbers including D250AD-00 H250AD-00 7GC81 and part numbers such as CYY97 7GC81 HY6D2 WX9P8.

Sustained 250W delivery in slim chassis

The supply maintains its 250W DC rating under continuous load rather than only in short bursts. A 100-240V AC range at 4.4A feeds the single 24-pin ATX and 4-pin ATX rails steadily. Three SATA power connectors share the 12V and 5V lines without extra PCIe or EPS cables that would draw current away from the main outputs. Thermal limits stay within the original Dell slim-form-factor envelope.

Direct swap using original Dell mounting

Installation uses the existing four screws and the same 24-pin ATX, 4-pin ATX and SATA plugs; no adapter cables are required. The only common issue is forgetting to seat the 4-pin ATX connector fully, which leaves the CPU rail unpowered and causes a no-post condition. Builders who need more than three SATA devices or a dedicated GPU power connector cannot use this unit.

Points forts

  • 250 W maximum output powers compatible Dell desktops
  • 100-240 V AC input works worldwide without a voltage switch
  • 24-pin ATX plus 4-pin CPU connectors feed motherboard and processor
  • Two SATA power leads drive storage and optical devices
  • Replaces multiple OEM part numbers including D250AD-00 and 7GC81

Caractéristiques

TypeAT

Questions sur cet article

How much power does the 250W unit draw from a 100-240V 4.4A mains supply when running continuously?

The PSU accepts 100-240V AC at 4.4A and delivers up to 250W DC output for all-day operation.

Which motherboard and drive connectors must my Dell slim desktop already have for this PSU to fit?

It requires a 24-pin ATX main connector, a 4-pin ATX auxiliary connector and two SATA power plugs for drives.

Will the 24-pin ATX and 4-pin ATX plugs on this unit work with the original motherboard in an OptiPlex 390 or 790?

Yes, the 24-pin ATX and 4-pin ATX connectors match the power headers used on those OptiPlex models.

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