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Compact silver TFX power supply unit with rear fan grille and cable bundle

myVolts

myVolts 420W TFX Power Supply for HP Pavilion Slimline s5414y s5500z s5508f

SKU CH-0490-5MV9H

TFX form-factor replacement PSU delivers 420 W for HP Pavilion Slimline s5414y, s5500z and s5508f models, upgrading 200 W, 250 W, 300 W or 350 W units with 20+4-pin, 4-pin CPU, Molex.

  • Product typeAT
  • Higher 420W output replaces 250W 300W 320W 350W units
  • TFX form factor fits HP Pavilion Slimline s5414y s5500z s5508f
  • 20+4 pin motherboard 4-pin CPU 2x Molex floppy 2x SATA connectors
  • 80mm double ball bearing fan provides cooling
  • 100-240V input works worldwide

Replacement PSU for HP Slimline

This new 420 W TFX power supply replaces the original 250 W, 300 W or 320 W units in HP Pavilion Slimline s5414y, s5500z and s5508f desktops. It delivers an AT-type output through a 20+4 pin motherboard connector, a 4-pin CPU connector, two Molex, a floppy and two SATA plugs. The compact form factor fits the slim chassis without modification.

420 W continuous output

The single figure that determines suitability is the 420 W steady rating, which exceeds the factory 200 W to 350 W range. Builders needing more headroom for discrete graphics cards or additional drives should verify their total system draw against this ceiling before purchasing.

80 mm double ball-bearing fan

An 80 mm fan with double ball bearings provides active airflow across the unit at 100–240 V input. The design targets quiet, reliable cooling in the constrained Slimline enclosure without requiring external ventilation changes.

How it compares

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

Price $95.99
Cheaper than about 69% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeAT

Questions about this item

How much continuous power will the 420 W rating actually deliver inside my Slimline?

The unit is rated for 420 W output and replaces the original 200 W, 250 W, 300 W or 350 W PSU, giving extra headroom for added drives or a discrete graphics card.

The 20+4 pin motherboard connector looks like ATX — will it work with my board?

Yes, the 20+4 pin plug fits standard ATX motherboards and the TFX form factor matches the Slimline chassis mounting holes.

What clearance does the 80 mm double-ball-bearing fan need in the Slimline case?

The fan sits in the standard TFX housing, so it aligns with the existing vent cut-out and requires no extra space beyond the stock PSU cavity.

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