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Rectangular black metal ATX power supply unit with 20+4 pin connector visible

HEC

HEC 550TB 550 W 20+4 Pin ATX power supply

SKU CH-R04X-RFP0S

ATX desktop power supply delivering 550 W through a 20+4-pin connector

  • Max wattage550 W
  • Product weight4
  • 550 W continuous power for stable desktop operation
  • 20+4 pin ATX connector fits standard motherboards
  • Tested and visually inspected for reliable performance
  • HEC Group engineering for dependable power delivery
  • Includes only the cables shown in the product images

What this power supply delivers

The HEC HEC-550TB is a 550 W ATX desktop power supply built for standard PC builds. It provides a 20+4 pin motherboard connector to fit modern boards. The unit is supplied new and includes only the cables shown in the product images. It suits users assembling or repairing a conventional desktop system.

Who this fits and who it does not

This PSU works for builders who need a straightforward 550 W ATX unit with a 20+4 pin connector for a typical desktop. It is not for systems that require additional PCIe power cables for dedicated graphics cards. Buyers needing modular cabling or higher wattage for multi-GPU configurations should look at other models.

The spec that decides compatibility

The single specification that decides fit is the 550 W maximum power rating combined with the 20+4 pin ATX connector. Verify that your build draws less than this output and that your motherboard uses the standard 20+4 pin socket. If your hardware demands more power or different connectors, this unit will not support it.

How it compares

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

Price $30.99
Cheaper than about 94% of the 10,869 comparable items (median $142.99).
Max wattage 550 W
Lower than about 82% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameHEC Group
Power
Max wattage550 W

Questions about this item

Does the HEC-550TB include all cables needed for a typical desktop build or must any be purchased separately?

The unit only comes with the cables shown in the product photographs; any connectors not pictured are not included and must be sourced separately.

Is the 550 W rating on this HEC-550TB a continuous or peak figure for a standard ATX system?

The specification lists a maximum power of 550 W for this ATX desktop power supply.

What does the 20+4 pin ATX connector on the HEC-550TB provide when installed in a modern motherboard?

The 20+4 pin design fits both 20-pin and 24-pin motherboard sockets, delivering the main board power required by ATX systems.

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