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

myVolts

myVolts 275W TFX Power Supply for HP Compaq Presario CQ4000KL

SKU CH-PP2G-433GW

TFX form-factor 275 W unit with 20+4 pin, 4-pin CPU, 3× Molex, floppy and 3× SATA connectors, 80 mm double-ball-bearing fan, 100/240 V input

  • TypeAT
  • Powers HP Compaq Presario CQ4000KL with 275W steady output
  • TFX form factor fits slimline and SFF chassis
  • 20+4 pin, 4-pin CPU, 3 SATA and 3 Molex connectors supplied
  • 80mm double ball bearing fan keeps temperatures low
  • Auto-switching 100/240V input works worldwide

TFX 275W PSU for HP Compaq CQ4000KL

This TFX form-factor power supply delivers 275 watts and is built as a direct replacement for the HP Compaq Presario CQ4000KL. It suits owners of that slimline desktop who need to restore reliable power after a failure or who want a fresh unit for continued use. The 20+4 pin motherboard connector, 4-pin CPU connector, three Molex, one floppy and three SATA connectors cover the internal devices found in the original chassis.

Standard TFX mounting and wiring

The unit fits the existing TFX cavity and uses the same screw pattern, so installation follows the normal slimline procedure: remove the side panel, unplug the old cables, swap the unit and reconnect. The 80 mm double ball-bearing fan provides active airflow; the most common issue is forgetting to seat the 4-pin CPU plug or leaving a SATA connector loose, which will prevent boot or drive detection.

Check your current PSU label and cable needs

Before ordering, confirm the original power supply is rated 200, 250, 300 or 350 watts and that the case accepts a TFX enclosure. Verify the motherboard uses a 20+4 pin main connector and a 4-pin CPU power header, and count the SATA, Molex and floppy devices you plan to power. The input range is 100 to 240 volts, so mains compatibility is broad.

Helstu kostir

  • Powers HP Compaq Presario CQ4000KL with 275W steady output
  • TFX form factor fits slimline and SFF chassis
  • 20+4 pin, 4-pin CPU, 3 SATA and 3 Molex connectors supplied
  • 80mm double ball bearing fan keeps temperatures low
  • Auto-switching 100/240V input works worldwide

Tæknilýsing

TypeAT

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How do I verify the 275W TFX power supply is running correctly after installation?

The 80mm double ball-bearing fan should spin steadily and the system should boot without shutdowns under load, confirming the 275W output is stable.

What connectors come with the unit and which cables must I source separately?

Included are a 20+4 pin motherboard connector, a 4-pin CPU connector, three Molex, one floppy and three SATA leads; no extra cables are required for a standard build.

Should I choose the 275W model or the 420W upgrade version for my CQ4000KL?

The 275W unit directly replaces the original 200, 250, 300 or 350W supply; select the 420W version only if you plan to add power-hungry components later.

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