Chapter 2: Installation
2-7
2-6 Connecting CablesPower Supply Connectors
The primary power supply
connector (J20) on the P4SCT/
P4SCT+/P4SCT+II meets the SSI
(Superset ATX) 24-pin specifica-
tion. Refer to the table on the
right for the pin definitions of the
ATX 20-pin power connector.
You must also connect the 4-pin
(J21) processor power connector
to your power supply. Refer to
the table below right for the J21
(12V) connector. (*You must use
J21 for CPU Power.)
Pins #1 & 23 & 4DefinitionGround+12 V+12V 4-pinConnector(J21)RequiredConnectionPW_ON Connector
The PW_ON connector is located
on pins 1 and 2 of JF1.
PinNumber12DefinitionPW_ON+3VPW_ONPin Definitions(JF1)ATX Power Supply 24-pin Connector
Pin Definitions (J20)
Pin Number Definition
13 +3.3V
14 -12V
15 COM
16 PS_ON#
17 COM
18 COM
19 COM
20 Res( NC)
21 +5V
22 +5V
23 +5V
24 COM
Pin Number Definition
1 +3.3V
2 +3.3V
3 COM
4 +5V
5 COM
6 +5V
7 COM
8 PWR_OK
9 5VSB
10 +12V
11 +12V
12 +3.3V
CPU478 PGAMCHPWR LED
COM2
USB 1/2
Parallel Port
JPWAKE
WOR
OH FAN/CH Fan5
COM 1
VGA
GLAN 1
PCI 1-XPCI-X 2PCI -X 3PCI 2FLOPPYBATTERY
BIOS DIMM 0A (Blue)Watch Dog
FRONT PANEL CTR
BANK0BANK1®
JF1
WOL
IR
Super I/O
Speaker
I-SATA LED
Keylock
USB 3/4
24-pin ATX PWRConn
SUPER P4SCT/P4SCT+/P4SCT+IIGLAN 2
PCI 1 CHS FAN3
Intel's SATA2
KB/Mouse
JPUSB
LAN2 Enable
RAGE-XL
+12V 4-pin PWR Conn.
PWR Froce On
(North Bridge) CHS FAN4
CPU Speed
CPU/CHFan1
Intel's SATA1
SATA1/5 SATA3/7SATA4/8
VGA Enable
AGP ProSMBus
SATA CTLR
GLAN CTLR
82541
CLR CMOS
HanceRapidsM-SATA1-2 Enable
MarvellSATA2/6
IDE1IDE2Ch. Intru.
CHS FAN2
(Marvall's SATA)
Standby LED
LAN CTLR
82547
DIMM 1A (Blue) DIMM 0B (Black) DIMM 1B (Black)Speaker
M- SATA LED
PWR Force On
LAN1 LEDPower ButtonOverheat LED1Reset Button2IDE LEDPower On LEDResetPwrVcc
Vcc
Vcc
Vcc
Ground
Ground
1920Vcc
X
Ground NMIX
X
X
LAN2 LEDA. 24-pin PWR Connector
B. 4-pin PWR Connector
C. PWR On Connector
A
B
C