User's Manual

ASUS PRIME B250M-A
1-1
Product introduction
1
Motherboard overview
• Unplug the power cord from the wall socket before touching any component.
• Before handling components, use a grounded wrist strap or touch a safely grounded
object or a metal object, such as the power supply case, to avoid damaging them due
to static electricity.
• Before you install or remove any component, ensure that the ATX power supply is
switched off or the power cord is detached from the power supply. Failure to do so
may cause severe damage to the motherboard, peripherals, or components.
• Unplug the power cord before installing or removing the motherboard. Failure to do so
can cause you physical injury and damage to motherboard components.
Place this
side towards
the rear of the
chassis
Scan the QR code to get the detailed pin denitions.
PRIME B250M-A
PCIE SATA
M.2_2
IRST
X4 X V
PCIE SATA
M.2_1
IRST
X4 V X
PCIEX16
PCIEX1_1
PCIEX1_2
SPEAKER
CHASSIS
CLRTC
F_PANEL
TPM
SPDIF_OUT
USB1112USB910
LPT
USB3_12
AAFP
COM
ATX12V
EATXPWR
CHA_FAN2
CPU_FAN
CHA_FAN1
BATTERY
Super
I/O
ALC
887
Realtek
8111H
DIGI
+VRM
24.4cm(9.6in)
LGA1151
Intel
®
B250
DDR4 DIMM_A1 (64bit, 288-pin module)
2280 2260 2242
2280 2260 2242
M.2_2(SOCKET3) M.2_1(SOCKET3)
DDR4 DIMM_A2 (64bit,288-pin module) DDR4 DIMM_B1 (64bit, 288-pin module) DDR4 DIMM_B2 (64bit, 288-pin module)
AUDIO
KBMS
HDMI
LAN_USB78
USB3_C3
USB3_56
20.6cm(8.1in)
128Mb
BIOS
SATA6G_5SATA6G_6 SATA6G_4
SATA6G_3 SATA6G_2 SATA6G_1
DVI VGA
LANGuard
321 42
1
88 910
8
7
6
1
5
12131415
18
11
17
19
16
16