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ATX 20-pin to P8 P9 and two 250 terminal power adapter cable

Wilfly

Wilfly ATX120262 ATX 20-pin to P8/P9 + 2×250 terminal internal power cable

SKU CH-K4WF-F2W1Y

Converts an ATX 20-pin supply to dual P8/P9 motherboard headers with two 250 terminals for the power switch

  • Cable length150 mm/500 mm (6 in/19.7 in)
  • First connector1 X ATX 20pin female
  • Second connector1 X P8 6Pin female + 1 X P9 6Pin female + 2 × 250 terminal
  • Connector count5
  • Converts ATX PSU to AT motherboard using 20-pin and dual 6-pin connectors
  • Powers legacy AT boards via P8 and P9 plus two 250 terminals
  • 100% copper conductors with UL-certified wire for reliable power delivery
  • RoHS-compliant construction meets environmental safety standards
  • Choice of 150 mm or 500 mm cable length for flexible routing

ATX-to-AT Power Adapter

This cable converts a standard ATX 20-pin supply into the P8 and P9 connectors required by AT motherboards. Two 250 terminals provide a connection point for a physical power switch. It is built with 100% copper wire and meets UL and RoHS requirements.

Retrofit Builders and Legacy Maintenance

The adapter suits technicians restoring vintage AT systems or industrial boards that still use the 6-pin P8/P9 pair. Builders working with modern ATX motherboards or any board that relies on additional ATX-derived rails should not use this cable.

Cable Length Choice

Two fixed lengths are offered: 150 mm (6 inch) and 500 mm (19.7 inch). Select the length that matches the distance between the power supply and the motherboard in your chassis.

How it compares

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

Price $5.99
Cheaper than about 94% of the 7,839 comparable items (median $14.99).

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Specifications

Ports & slots
First connector1 X ATX 20pin female
Second connector1 X P8 6Pin female + 1 X P9 6Pin female + 2 × 250 terminal
Connector count5
Size & build
Cable length150 mm/500 mm (6 in/19.7 in)

Questions about this item

How does the 20-pin ATX connector translate power to the older motherboard headers?

The cable splits a single ATX 20-pin female into one P8 6-pin and one P9 6-pin female, delivering the required voltages to an AT-style motherboard.

What does the 250-terminal pair add to the conversion?

Two 250 terminals connect the case power switch so the AT motherboard can be turned on from the front panel.

What clearance is needed for the 150 mm or 500 mm cable run?

Choose the 150 mm version for tight spaces or the 500 mm version for full-tower routing; both use 100 % copper conductors.

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