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Compact TFX power supply unit with 80mm cooling fan and multiple cable connectors

myVolts

myVolts 320 W TFX power supply for Dell Liteon PS-5251-5

SKU CH-3XD7-P6HWB

A 320 W TFX power supply with 20+4 pin, 4-pin CPU, Molex, floppy and SATA connectors for Dell Liteon PS-5251-5 systems

  • Product typeAT
  • Delivers 320 W steady power for demanding components
  • TFX form factor fits Slimline and SFF Dell desktops
  • 20+4 pin, 4-pin CPU, 2× Molex, Floppy, 2× SATA connectors cover legacy and modern drives
  • 80 mm fan provides active cooling under load
  • 100/240 V input works worldwide without a voltage switch

TFX 320 W replacement PSU

This TFX form-factor power supply delivers 320 W of continuous power for Dell desktops that use the Liteon PS-5251-5 unit. It fits slimline and small-form-factor chassis where a standard ATX PSU will not install. The 80 mm cooling fan draws air through the compact housing to keep components stable under load. Input voltage ranges from 100 to 240 V for worldwide compatibility.

Suitable for SFF Dell upgrades

The unit suits owners of compatible Dell OptiPlex, Vostro or Inspiron small-form-factor systems needing a direct swap for a failed or undersized PSU. It provides the 20+4 pin motherboard, 4-pin CPU, two Molex, floppy and two SATA connectors required by those platforms. Builders working in standard ATX cases or needing higher wattage for discrete graphics cards should look elsewhere. The 320 W ceiling limits headroom for power-hungry add-in cards.

320 W output rating

The single specification that decides fit is the 320 W maximum output, which replaces Dell units originally rated at 200, 250, 275, 300 or 350 W. If the target system demands more than 320 W under full load, this PSU cannot sustain it and a higher-capacity TFX unit must be sourced. Verify the Dell service tag against the PS-5251-5 part number before purchase.

How it compares

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

Price $71.99
Cheaper than about 78% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeAT

Questions about this item

Is the 320 W output enough to upgrade from a 275 W Dell Liteon PS-5251-5?

Yes, the 320 W rating exceeds the 275 W original and also replaces 200, 250, 300 or 350 W units in compatible slimline and SFF models.

What does the 320 W rating actually deliver inside a Dell SFF chassis?

It provides steady 320 W through a 20+4 pin motherboard connector, a 4-pin CPU connector, two Molex, a floppy connector and two SATA connectors, cooled by an 80 mm fan.

Does the TFX form factor and 100/240 V input work with standard AT wiring in a Dell SFF?

Yes, the unit is a TFX-type AT supply with 100/240 V input and the listed connectors, designed to fit Dell slimline and SFF cases that used the Liteon PS-5251-5.

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