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

myVolts

myVolts 400W TFX Power Supply for Dell Studio Slim 540s 537s 560s SFF

SKU CH-DWN7-MHHC9

TFX 400W replacement PSU fits Dell Studio Slim 540s, 537s and 560s SFF, upgrading from 200, 250, 300 or 350W with 20+4 pin, 4-pin CPU, 2× Molex, floppy and 2× SATA connectors

  • TypeAT
  • Direct replacement for Dell Studio Slim 540s, 537s and 560s SFF
  • 400 W output powers older PCs and new custom builds with peripherals
  • Upgrades from 200, 250, 300 or 350 W units to 420 W peak
  • 80 mm double ball-bearing fan keeps temperatures low
  • 20+4 pin, 4-pin CPU, 2× Molex, floppy and 2× SATA connectors included

Dell Studio Slim TFX PSU

This 400W TFX power supply replaces the original unit in Dell Studio Slim 540s, 537s and 560s small-form-factor desktops. It delivers 400 watts of steady output and upgrades systems that shipped with 200, 250, 300 or 350 watt units. The AT-type design fits the proprietary TFX chassis used by these models. Builders restoring or upgrading a compatible Dell SFF will find a direct mechanical and electrical match.

80mm double ball-bearing cooling

An 80mm fan with double ball bearings handles airflow through the compact housing. The bearing choice reduces wear compared with sleeve types, helping the fan run consistently over long periods. Input voltage spans 100 to 240 volts, so the unit accepts worldwide mains without a switch. Normal operation stays within the 400 watt rating while the fan manages thermals in the tight SFF enclosure.

Upgrade from 200–350 watt originals

The supply replaces factory units rated at 200, 250, 300 or 350 watts, adding headroom for extra drives or a modest graphics card. Connectors include a 20+4 pin motherboard plug, a 4-pin CPU plug, two Molex, a floppy connector and two SATA plugs. Systems needing more than 420 watts peak or additional PCIe power cables are not served by this model.

Points forts

  • Direct replacement for Dell Studio Slim 540s, 537s and 560s SFF
  • 400 W output powers older PCs and new custom builds with peripherals
  • Upgrades from 200, 250, 300 or 350 W units to 420 W peak
  • 80 mm double ball-bearing fan keeps temperatures low
  • 20+4 pin, 4-pin CPU, 2× Molex, floppy and 2× SATA connectors included

Caractéristiques

TypeAT

Questions sur cet article

How do I install this 400W TFX power supply into a Dell Studio Slim 540s and which connector step is often missed?

Fit the TFX unit into the Slim chassis, secure it with the rear screws, then attach the 20+4 pin motherboard plug, the 4-pin CPU plug, two Molex, the floppy lead and both SATA connectors — the 4-pin CPU plug is the one most often forgotten.

What maintenance will this 400W TFX supply need later?

The 80mm double-ball-bearing fan is the only moving part; clean dust from its intake every few months and replace the fan if bearing noise appears.

What limit appears first when this 400W TFX supply runs under sustained load?

The 400W continuous output ceiling is reached before any other limit; the 80mm fan must move enough air to keep internal temperatures stable at that wattage.

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