Brochage

Brochage Connecteur carte mère 24 broches d'alimentation ATX (ATX12V 2.x)

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Broches

• 1: +3.3V (orange)
• 2: +3.3V (orange)
• 3: GND (black)
• 4: +5V (red) — many older units will not regulate the other rails properly without a few hundred mA of load on +5V
• 5: GND (black)
• 6: +5V (red)
• 7: GND (black)
• 8: PWR_OK / Power Good (grey) — an output flag that goes high 100–500ms after every rail is in spec. Read it, never draw current from it
• 9: +5VSB standby (purple) — live whenever the PSU is plugged in and the rear switch is on, even with the machine off; usually only 2–3A
• 10: +12V (yellow)
• 11: +12V (yellow) — this pin plus 12, 23 and 24 are the detachable four-way block on a "20+4" cable
• 12: +3.3V (orange)
• 13: +3.3V (orange, often with a thin brown +3.3V remote-sense wire crimped into the same terminal — leave the sense wire connected or the 3.3V rail drifts out of tolerance)
• 14: −12V (blue) — low current only, typically 0.3–0.8A
• 15: GND (black)
• 16: PS_ON# (green) — short it to any GND pin to switch the supply on; open = off. This is the only pin you need to bench-start a PSU
• 17: GND (black)
• 18: GND (black)
• 19: GND (black)
• 20: −5V (white) — removed from the spec in ATX12V 2.01, so this position is empty on any modern supply
• 21: +5V (red)
• 22: +5V (red)
• 23: +5V (red)
• 24: GND (black) — the eight black pins share the whole return current, so if you are pulling real amps out of this connector spread the load over several grounds rather than one

Caractéristiques

Notes

• Ces couleurs de fils sont une convention de fait du secteur, pas une spécification imposée — certaines alimentations OEM (propriétaires Dell/HP) s'en écartent. Vérifiez par la position des broches et le détrompage du connecteur, pas par la seule couleur, sur tout ce qui n'est pas standard.