Asus A8N-SLI SE manual Power supply requirements

7. ATX power connectors (24-pin EATXPWR1,4-pin ATX12V1, 4-pin EZ _PLUG)

These connectors are for an ATX power supply plugs. The power supply plugs are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit.

•Do not forget to connect the 4-pin ATX +12 V power plug;

otherwise, the system will not boot.

•If your power connector is 20-pin when you use two graphics cards, do not forget to connect the 4-pin ATX +12 V power plug to the EZ Plug™; otherwise, the system will be unstable. See page 6-5 for details.

•Use of a Power Supply Unit (PSU) with a higher power output is recommended when configuring a system with more power- consuming devices. The system may become unstable or may not boot up if the power is inadequate.

•Make sure that your PSU can provide at least the minimum power required by your system. See the table below for details.

Power supply requirements

		Loading
Components/Peripherals	Heavy	Normal	Light
AMD® K8 939-pin CPU type	Athlon 64 FX-55	Athlon 64 3800+	Athlon 64 3400+
PCIe™ x16 graphics cards	6800 Ultra x2	6800GT x2	6600GT x2
DDR DIMMs	4	2	2
HDD	4	2	2
Optical drive (DVD/CD-RW)	2	2	1
PCIe™ x 1 card	1	0	0
PCI cards	3	2	1
USB devices	6	4	3
Required +12V current	> 25A	> 20A	> 17A
Required wattage	>= 500W	>= 400W	>= 350W

	ATX12V		EATXPWR
	+12V DC	+12V DC
	GND	GND	+3 Volts	+3 Volts
			-12 Volts	+3 Volts
			Ground	Ground
			PSON#	+5 Volts
	EZ_PLUG		Ground	Ground
A8N-SLI SE			Ground	+5 Volts
		+5V	Ground	Ground
		EZ_DET	-5 Volts	Power OK
		GND	+5 Volts	+5V Standby
		+12V	+5 Volts	+12 Volts
A8N-SLI SE ATX Power Connectors			+5 Volts	+12 Volts
			Ground	+3 Volts

ASUS A8N-SLI SE 2-25