We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Compact TFX power supply unit with metal casing and rear 80mm fan grille

myVolts

myVolts 420W TFX Power Supply for HP Pavilion Slimline s5540in s5550z s5560in

SKU CH-K3S6-P7A01

TFX power supply delivering 420 watts for HP Pavilion Slimline s5540in, s5550z and s5560in desktops

  • Product typeAT
  • Delivers 420 W to power demanding upgrades
  • TFX form factor fits Slimline and SFF chassis
  • 20+4 pin, 4-pin CPU, 2× Molex, floppy, 2× SATA connectors
  • 80 mm fan cools the unit quietly
  • 100–240 V input works worldwide

Replacement TFX Power Supply

This 420 W TFX unit replaces the original supply in HP Pavilion Slimline s5540in s5550z s5560in desktops. It is intended for owners of those specific Slimline and SFF models who need a direct replacement or a higher-wattage upgrade. The supply delivers 420 W maximum output, stepping up from the factory 350 W rating.

Build and Connectors

The TFX form factor fits the narrow Slimline chassis without modification. An 80 mm cooling fan handles airflow in the compact enclosure. Cabling provides a 20+4 pin motherboard connector, a 4-pin CPU connector, two Molex, a floppy connector and two SATA connectors for drives and peripherals. Input voltage ranges from 100 to 240 V for worldwide use.

Deciding Specification

The 420 W maximum output is the single figure that determines whether this unit can support your installed components. If your graphics card, drives and other peripherals draw more than 420 W combined, this supply will not be sufficient. Buyers who need more power for additional drives or a higher-end graphics card should look elsewhere.

How it compares

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

Price $105.99
Cheaper than about 65% of the 10,869 comparable items (median $142.99).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Product typeAT

Questions about this item

Does the TFX form factor fit the HP Pavilion Slimline s5540in, s5550z and s5560in chassis?

Yes, the TFX design is built for Slimline and SFF cases, matching the mounting points and depth of the original supply in those three models.

What connectors come on the unit for drives and the motherboard?

It provides a 20+4 pin motherboard connector, a 4-pin CPU connector, two Molex, a floppy connector and two SATA plugs for drives.

How is the PSU swapped in, and what step is often missed?

Remove the side panel, unplug all cables from the old unit, unscrew the TFX supply from the rear, fit the new one, then reconnect every connector — including the 4-pin CPU lead, which is frequently overlooked.

More in ATX Desktop Power Supplies

Similar items