8 . 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.

•When using 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-x for details.

•Use of a 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 power supply unit (PSU) can provide at least the minimum power required by your system. See the table below for details.

Power supply requirements

 

 

 

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Components/Peripherals

H e a v y

Normal

L i g h t

 

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

 

IEEE 1394 devices

1

0

0

 

USB devices

6

4

3

 

Required +12V current

> 2 5 A

> 2 0 A

> 1 7 A

 

Required wattage

> = 500W

> = 400W

> = 350W

 

ATX12V

EATXPWR

 

+12V DC GND

 

 

 

 

+3 Volts

+3 Volts

 

 

-12 Volts

+3 Volts

 

+12V DC GND

Ground

Ground

 

PSON#

+5 Volts

 

 

A8N-SLI PREMIUM

EZ_PLUG

Ground

Ground

 

Ground

+5 Volts

 

 

 

+5V

Ground

Ground

 

EZ_DET

-5 Volts

Power OK

 

GND

+5 Volts

+5V Standby

 

+12V

+5 Volts

+12 Volts

A8N-SLI PREMIUM ATX power connectors

+5 Volts

+12 Volts

Ground

+3 Volts

 

 

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Chapter 2: Hardware information