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Black 24-pin ATX power supply jumper with push-button switch

ModMyMods

ModMyMods Jump Start EPS/ATX 24 Pin Power Supply Jumper On/Off Switch - No Light (MOD-0271)

SKU CH-VRPC-HC0TS

A 24-pin jumper with an on/off button powers an ATX supply without a motherboard

  • Product colorBlack
  • Key featuresDo you need to turn on an ATX power supply without a motherb
  • Turn on an ATX PSU without a motherboard using the built-in 24-pin female Molex connector
  • Replace paperclip jumpers with a dedicated on/off button for safer bench testing
  • Simple press operation activates the power supply instantly
  • Black 24-pin design fits standard EPS/ATX connectors
  • Model MOD-0271 provides a compact switching solution for PSU testing

ATX 24-Pin Jumper Switch

This compact adapter plugs into a standard 24-pin ATX connector on a power supply and provides a physical on/off button. It lets technicians or hobbyists power the unit without a motherboard installed. The black housing contains no indicator light. Model reference is MOD-0271.

Bench testing and PSU diagnostics

Ideal for verifying a power supply before installation, running pumps during liquid-cooling loop filling, or powering peripherals on a test bench. Builders who need the PSU to stay permanently on without a momentary switch, or who require a lighted status indicator, should choose a different tool.

24-pin female Molex interface

The only connection is a 24-pin female Molex socket that mimics the motherboard power-on signal. Pressing the button bridges the PS-ON and ground pins to start the supply. No other cables, headers or voltage selections are present.

How it compares

Measured against everything we stock in Internal PSU & Riser Cables, at today’s prices. Recalculated every night.

Price $2.99
Cheaper than about 97% of the 7,839 comparable items (median $14.99).

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Specifications

Product
Brand nameGENERIC
Model nameMOD-0271
Product colorBlack

Questions about this item

Does the jumper draw any power or generate heat when the PSU runs continuously?

The device is a passive mechanical switch with no active electronics, so it adds no measurable power draw or heat during extended operation.

What connectors must my power supply already provide for this jumper to work?

Your PSU needs a standard 24-pin ATX/EPS output; the jumper plugs directly into that female Molex socket to bridge the power-on pins.

Will this switch work with an older ATX supply that uses the 20-pin main connector?

No — the jumper only fits a 24-pin ATX/EPS header, so it cannot connect to legacy 20-pin power supplies.

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