Power Supply; Atx 24-Pin Power Connector: Atx1; Atx 4-Pin Power Connector: Pwr1 - MSI MS-7521 Getting Started

Power Supply

ATX 24-Pin Power Connector: ATX1

This connector allows you to connect an ATX 24-pin power supply. To connect the
ATX 24-pin power supply, make sure the plug of the power supply is inserted in the
proper orientation and the pins are aligned. Then push down the power supply firmly
into the connector.
12
24
ATX1
13
1

ATX 4-pin Power Connector: PWR1

This power connector is used to provide power to the CPU.
PWR2
4
3
Important
1. Make sure that all the connectors are connected to proper ATX power sup-
plies to ensure stable operation of the mainboard.
2. Power supply of 350 watts (and above) is highly recommended for system
stability.
Pin Definition
PIN SIGNAL PIN
1 +3.3V 13
2 +3.3V 14
3 GND 15
4 +5V 16
5 GND 17
6 +5V 18
7 GND 19
8 PWR OK 20
9 5VSB 21
10 +12V 22
11 +12V 23
24
12 +3.3V
Pin Definition
PIN SIGNAL
2
1 GND
2 GND
1
3 12V
4 12V
Hardware Setup
SIGNAL
+3.3V
-12V
GND
PS-ON#
GND
GND
GND
Res
+5V
+5V
+5V
GND
2-9