4-10
Chapter 4: Motherboard info
8. ATX power connectors
(24-pin EATXPWR and 4-pin ATX12V)
These connectors are for 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.
• 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.
• If you intent to use a PSU with 20-pin and 4-pin power plugs, make
sure that the 20-pin power plug can provide at least 15A on +12V
and that the PSU has a minimum power rating of 350 W. The
system may become unstable or may not boot up if the power is
inadequate.
• The ATX 12 V Specification 2.0-compliant PSU passed the
motherboard power requirement test with the following
configuration:
CPU
: Intel
®
Pentium
®
4 3.6 GHz
Memory
: 512 MB DDR (x 4)
Graphics card
: PCI Express x16 Nvidia EN5900
Parallel ATA devices : IDE hard disk drive (x 2)
Serial ATA device : SATA hard disk drive
Optical drive
: CD-ROM (x2)
SCSI devices
: SCSI card and SCSI hard disk drive
• You must install a PSU with a higher power rating if you intend to
install additional devices.
P5L-VM 1394
R
P5L-VM 1394 ATX Power Connector
EATXPWR
+3 Volts
+3 Volts
Ground
+5 Volts
+5 Volts
Ground
Ground
Power OK
+5V Standby
+12 Volts
-5 Volts
+5 Volts
+3 Volts
-12 Volts
Ground
Ground
Ground
PSON#
Ground
+5 Volts
+12 Volts
+3 Volts
+5 Volts
Ground
EATX12V
GN
D
+12V DC
GN
D
+12V DC
