PRIME B450M-A

• Fan Xpert 2+: Flexible controls for ultimate cooling and silence, plus GPU-temperature sensing for cooler gaming
• Ultrafast connectivity: Supreme flexibility with USB 3.1 Gen 2 and native M.2
• ASUS Aura Sync header: Onboard connector for RGB LED strips, easily synced with an ever-growing portfolio of Aura Sync-capable hardware
• 5X Protection III: Multiple hardware safeguards for all-around system protection

Cooler by design

Prime B450 Series features the most comprehensive cooling controls ever, configurable via ASUS Fan Xpert software or the UEFI BIOS.

Each header can be set to monitor and react to up to three thermal sensors. Via Fan Xpert, you can also assign a sensor to monitor the temperature of supported ASUS graphics cards to ensure optimal cooling during GPU- or CPU-intensive workloads.

Make your memory faster

Featuring an array of trace layout tweaks that improve memory stability, PRIME B450 Series provides a potent foundation for your build. With comprehensive support for the full gamut of Ryzen memory configurations – from entry-level to performance-oriented — PRIME B450 Series is a versatile all-rounder that can work or play.

Media-acclaimed UEFI BIOS

The UEFI BIOS is an early waypoint on any PC-building journey, and Prime B450 Series has one of the best in the business.

Q-Fan ControlCan configure the fan’s operating speed manually, or use the easy pre-configured fan profiles to select Standard, Silent, Turbo or Full Speed modes, plus automatic switch to full speed if the temperature hits 75°C.

Search FunctionWhen you’re ready for a deeper dive, Advanced mode enables full control over every aspect of the motherboard — with a built-in Search function to find the setting you need in the blink of an eye.

USB 3.1 Gen 2 Type-A

Ultimate-speed 10Gbps with USB 3.1 Gen 2 onboard

With backward-compatible USB 3.1 Gen 2 Type-A™, you’ll experience ultimate connection flexibility and blazing data-transfer speeds of up to 10Gbps — twice as fast as standard USB 3.1 Gen 1.

USB 3.1 Gen 1 front-panel connector

Future-proof connectivity

USB 3.1 Gen 1 is right where you need it, with two super-speed headers for the front panel. Experience data-transfer speeds up to 10X faster than USB 2.0 with instant plug-and-play connectivity, and avoid back-breaking contortions in the hunt for hard-to-reach rear ports.

M.2

Speed up with onboard M.2

With x4 PCI Express^® 3.0/2.0 bandwidth, M.2 supports up to 32Gbps data-transfer speeds. It’s the perfect choice for an operating system or application drive, providing fast access to data.

AMD StoreMI

Affordable acceleration for any hard drive

AMD StoreMI technology is a software utility that accelerates any drive for better system responsiveness with reduced startup and software load times. It combines SSD performance with the affordability and capacity of an HDD by automatically moving frequently accessed data to dedicated SSD storage.

SPECIFICATIONS

Model

Brand

ASUS

Model

PRIME B450M-A/CSM

Supported CPU

CPU Socket Type

AM4

CPU Type

AM4 socket for AMD Ryzen 2nd Generation/ Ryzen with Radeon Vega Graphics/ Ryzen 1st Generation Processors
* Refer to www.asus.com for the AMD CPU support list.

Chipsets

Chipset

AMD B450

Memory

Number of Memory Slots

4×288pin

Memory Standard

DDR4 3200(O.C)/ 3000(O.C)/ 2800(O.C)/ 2666/ 2400/ 2133
* Refer to www.asus.com for the Memory QVL (Qualified Vendors List).

Maximum Memory Supported

64GB

Channel Supported

Dual Channel

Expansion Slots

PCI Express 3.0 x16

AMD Ryzen 2nd Generation/ Ryzen 1st Generation Processors
1 x PCIe 3.0/2.0 x16 (x16 mode)

AMD Ryzen with Radeon Vega Graphics Processor
1 x PCIe 3.0/2.0 x16 (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

1 x M.2 socket 3 with M Key, Type 2242/2260/2280/22110 (PCIE 3.0 x4 and SATA modes) storage devices support*
* The M.2 Socket shares bandwidth with the SATA_5/6 ports, and therefore the SATA_5/6 ports cannot be used when an M.2 device is installed.

SATA RAID

0/1/10

Onboard Video

Onboard Video Chipset

Integrated Graphics in the AMD Ryzen with Radeon Vega Graphics Processors
Multi-VGA output support: HDMI, DVI-D, D-Sub ports
– Supports HDMI 2.0b with a maximum resolution of 4096 x 2160 @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

Onboard Audio

Audio Chipset

Realtek ALC887

Audio Channels

8 Channels
* Use a chassis with HD audio module in the front panel to support an 8-channel audio output.

Onboard LAN

LAN Chipset

Realtek RTL8111H

Max LAN Speed

10/100/1000Mbps

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 Gen 2 ports
4 x USB 3.1 Gen 1 ports

Audio Ports

3 Ports

Internal I/O Connectors

Onboard USB

1 x USB 3.1 Gen 1 (up to 5Gbps) connector(s) support(s) additional 2 USB 3.1 Gen 1 port(s) (19-pin)
2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s)

Other Connectors

1 x Aura RGB Strip Header
1 x TPM header
1 x COM port(s) connector(s)
1 x CPU Fan connector(s) (1 x 4-pin)
2 x Chassis Fan connector(s) (2 x 4-pin)
1 x S/PDIF out header(s)
1 x Front panel audio connector(s) (AAFP)
1 x System panel(s)
1 x Clear CMOS jumper(s)
1 x Speaker connector

Physical Spec

Form Factor

Micro ATX

LED Lighting

RGB

Dimensions (W x L)

243.84 mm x 241.30 mm

Power Pin

1 x 24-pin EATX Power connector
1 x 8-pin ATX 12V Power connector

Features

Features

Special Features:
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
ASUS Exclusive Features:
– AI Suite 3
– Ai Charger
ASUS Quiet Thermal Solution:
– Stylish Fanless Design Heat-sink solution
– ASUS Fan Xpert 2+
ASUS EZ DIY:
– ASUS CrashFree BIOS 3
– ASUS EZ Flash 3
– ASUS UEFI BIOS EZ Mode
– Multi-language BIOS
ASUS Q-Design:
– ASUS Q-Slot
– ASUS Q-DIMM 

BIOS:
128MB Flash ROM, UEFI AMI BIOS, PnP, SM BIOS 3.1, ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, ASUS CrashFree BIOS 3, F3 My Favorite, Last Modified log, F12 PrintScreen, ASUS DRAM SPD (Serial Presence Detect) memory information, F6 Qfan Control

Operating System:
Windows 10 64-bit

Packaging

Package Contents

Accessories:
User’s manual
I/O Shield
2 x SATA 6Gb/s cable(s)
1 x M.2 Screw Package
1 x Supporting DVD