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Compact TFX power supply unit with metal casing and rear fan grille

myVolts

myVolts 320W TFX Power Supply for Dell Liteon PS-5251-5

SKU CH-WHKS-6FN64

TFX form-factor PSU delivering 320 W through 20+4 pin, 4-pin CPU, 2x Molex, floppy and 2x SATA connectors, cooled by an 80 mm double-ball-bearing fan.

  • TypeAT
  • 320 W steady output powers a wide range of Dell desktops
  • TFX form factor fits slimline and small-form-factor cases
  • 20+4 pin, 4-pin CPU, 2× Molex, floppy and 2× SATA connectors cover legacy and modern drives
  • 80 mm double ball-bearing fan provides reliable cooling
  • 100/240 V input works worldwide without a voltage switch

Direct Replacement for Dell Liteon PS-5251-5

This TFX power supply replaces the Dell Liteon PS-5251-5 unit in compatible small-form-factor desktops. It delivers 320W of continuous power for systems that previously used 200W, 250W, 300W or 350W units. The 20+4 pin motherboard connector, 4-pin CPU connector, two Molex, floppy and two SATA connectors cover typical internal devices. Builders upgrading a slimline or SFF chassis can install it without adapter cables.

Thermals, Noise and Power Draw

An 80mm double-ball-bearing fan provides active cooling across the 100-240V input range. The bearing type reduces wear compared with sleeve designs, helping the unit run quietly during normal desktop loads. At 320W output the supply meets the needs of office workstations and light multimedia builds without exceeding its rated capacity. No additional case airflow is required beyond the standard SFF ventilation.

Build Quality and Day-to-Day Connectors

The TFX form factor fits the mounting holes and rear cutout of the original Dell chassis, so installation uses the existing screws and bracket. All cables are fixed, keeping the interior tidy in tight compartments. SATA connectors support current SSDs and hard drives, while Molex and floppy headers remain available for legacy peripherals. The unit ships new and ready for immediate swap-in.

Highlights

  • 320 W steady output powers a wide range of Dell desktops
  • TFX form factor fits slimline and small-form-factor cases
  • 20+4 pin, 4-pin CPU, 2× Molex, floppy and 2× SATA connectors cover legacy and modern drives
  • 80 mm double ball-bearing fan provides reliable cooling
  • 100/240 V input works worldwide without a voltage switch

Specifications

TypeAT

Questions about this item

How is the 20+4 pin motherboard connector seated without bending pins?

Align the keyed 20+4 pin plug with the motherboard socket and press straight down until the latch clicks; forcing it at an angle bends pins.

Which component will need replacement first after long-term operation?

The 80mm double ball bearing fan is the primary wear item; its bearings degrade before the 320W supply’s capacitors under normal use.

What limit appears first when the unit runs continuously at full load?

Thermal headroom of the 80mm fan cooling the 320W output is the first constraint; sustained max draw raises internal temps faster than the fan can exhaust.

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