Model

Brand

ASUS

Model

Prime B350M-A/CSM

Supported CPU

CPU Socket Type

AM4

CPU Type

Ryzen / Athlon / A-Series

Chipsets

Chipset

AMD B350

Memory

Number of Memory Slots

4×288pin

Memory Standard

Ryzen Processors, DDR4 2666/ 2400/ 2133
7th Generation A-series/Athlon Processors, DDR4 2400/ 2133

Maximum Memory Supported

64GB

Channel Supported

Dual Channel

Expansion Slots

PCI Express 3.0 x16

Ryzen Processors
1 x PCI Express 3.0/2.0 x16 slot (max.@x16 mode)

7th Generation A-series/Athlon Processors
1 x PCI Express 3.0/2.0 x16 slot (max.@x8 mode)

PCI Express x1

2 x PCI Express 2.0 x1 slots

Storage Devices

SATA 6Gb/s

6 x SATA 6Gb/s

M.2

Ryzen Processors
- 1 x M.2 socket 3 with M Key, Type 2242/2260/2280/22110 (PCIE 3.0 x4 and SATA modes) storage devices support*
* When a SATA / PCIE mode M.2 device is installed, the M.2 Socket shares bandwidth with the SATA6G_5/6 ports

7th Generation A-series/Athlon Processors
- 1 x M.2 socket 3 with M Key, Type 2242/2260/2280/22110 (PCIE 3.0 x2 and SATA modes) storage devices support*
* When a SATA mode M.2 device is installed, the M.2 Socket shares bandwidth with the SATA6G_5/6 ports

SATA RAID

0/1/10

Onboard Video

Onboard Video Chipset

Integrated AMD Radeon R Series Graphics in the 7th Generation A-Series APU
Multi-VGA output support: HDMI, DVI-D, D-Sub port
- Supports HDMI 1.4b with max. resolution 4096 x 2160@24Hz / 2560 x 1600@60Hz
- Supports DVI-D with max. resolution up to 1920 x 1200 @60Hz
- Supports D-Sub with max. resolution up to 1920 x 1200 @60Hz
- Maximum shared memory of 2048MB

Onboard Audio

Audio Chipset

Realtek ALC887-VD2

Audio Channels

8 Channels

Onboard LAN

LAN Chipset

Realtek 8111H

Rear Panel Ports

PS/2

1 x PS/2 keyboard (purple)
1 x PS/2 mouse port (green)

Video Ports

1 x DVI-D port 
1 x D-Sub port

HDMI

1 x HDMI

RJ45

1 x RJ45

USB 3.1

2 x USB 3.1

USB 3.0

4 x USB 3.0

Audio Ports

3 x Audio jacks support 8-channel audio output

Internal I/O Connectors

Onboard USB

1 x USB 3.0 connector supports additional 2 USB 3.0 ports
2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1 ports

Other Connectors

1 x COM connector
1 x CPU Fan connector
1 x Fan RGB header
1 x Chassis Fan connector (Support DC & PWM mode)
1 x Front panel audio connector
1 x 24-pin EATX Power connector
1 x 8-pin ATX 12V Power connector
1 x 2-pin Clear CMOS 
1 x System Panel connector
1 x Speaker connector
1 x S/PDIF out header

Physical Spec

Form Factor

uATX

Dimensions (W x L)

9.6" x 9.45"

Power Pin

24 Pin

Features

Features

ASUS Unique Features:
Dependable Stability
ASUS 5X PROTECTION III
- ASUS SafeSlot Core: Fortified PCIe Slot prevents damage
- ASUS LANGuard: Protects against LAN surges, lightning strikes and static-electricity discharges!
- ASUS Overvoltage Protection: World-class circuit-protecting power design
- ASUS Stainless-Steel Back I/O: 3X corrosion-resistance for greater durability!
- ASUS DIGI+ VRM: 6 Phase digital power design
Superb performance
UEFI BIOS
- Most advanced options with fast response time
Easy PC DIY
Safe motherboard mounting
- Component-free areas to minimize damage risk
Q-Design
- ASUS Q-DIMM
- ASUS Q-Slot
UEFI BIOS EZ Mode
- featuring friendly graphics user interface
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3

ASUS Quiet Thermal Solution:
Quiet Thermal Design:
- Stylish Fanless Design: Chipset Heat-sink 
- ASUS Fan Xpert 

BIOS:
128MB Flash ROM, UEFI AMI BIOS, PnP, DMI3.0, WfM2.0, SM BIOS 3.0, ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, ASUS CrashFree BIOS 3, My Favorites, Last Modified log, F12 PrintScreen, ASUS DRAM SPD (Serial Presence Detect) memory information, F6 Qfan Control

Manageability:
WfM 2.0, DMI 3.0, WOL by PME, PXE

Support DVD:
Drivers
ASUS Utilities
ASUS Update 
Anti-virus software (OEM version)

Operating System Support:
Windows 10 (64-bit)

Packaging

Package Contents

Accessories:
2 x Serial ATA 6.0Gb/s cables
1 x I/O shield
1 x M.2 screw package
1 x User's manual