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ASUS mATX Skt-AM4 4xDDR4 ALC887/ /RTL8111H [V/D/H]

  • Brand: ASUS
  • Manufacturer Part #: PRIME B350M-A/CSM
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ASUS Prime is the next evolution of the ASUS motherboard, born of a pedigree that stretches back to 1989. The team of world-class engineers are passionate about empowering everyone to enjoy the benefits of customization and tuning, and the driving force behind the development of Prime is to make advanced enthusiast controls easily accessible - maximizing performance, stability and compatibility for the very best DIY PC experiences. Simply stated: it's time for Prime.

Product Features

Built to last

ASUS is the world's foremost motherboard manufacturer, renowned for the unique Design Thinking approach. The exhaustive testing exceeds industry standards, supported by high-quality components for exceptional real-world protection. The motherboards are proven to be compatible with more than 1,000 components and devices, and each new model undergoes a minimum of 8,000 hours of strict validation. ASUS gives you the peace of mind of knowing that your motherboard is fit for all environments and applications. By choosing ASUS, you also gain the freedom to select outstanding component options, for trouble-free DIY experiences.

Fortified PCIe slot prevents damage

SafeSlot Core is the ASUS-exclusive PCIe slot. Featuring a fortified design that's anchored to the motherboard by a special hook, Safeslot Core provides 1.6x stronger retention and 1.3x greater shearing resistance than standard expansion slots.

Pumped-up throughput, 2.5x higher surge tolerance

ASUS LANGuard is hardware-level networking protection that employs signal-coupling technology and premium anti-EMI surface-mounted capacitors to ensure a more reliable connection and better throughput, plus electrostatically guarded and surge-protected components for greater tolerance to static electricity and improved protection against surges.

Overvoltage protection

An exclusive circuit design with built-in voltage regulators to protect your chipset, connectivity ports, and audio codecs from damage caused by unexpected high-level voltages from unstable or inferior power supplies.

Electrostatic discharge protection

ASUS ESD Guards prevent damage from electrostatic discharge, up to +/- 10kV for air discharge and +/- 6kV for contact discharge, arranged in an active-protective-circuit design that prolongs the life of components.

ASUS mATX Skt-AM4 4xDDR4 ALC887/ /RTL8111H [V/D/H]

Main Specifications

Product Description

ASUS PRIME B350M-A/CSM - motherboard - micro ATX - Socket AM4 - AMD B350 FCH

Product Type

Motherboard - micro ATX

Chipset Type


Processor Socket

1 x Socket AM4

Compatible Processors

Athlon, A series, Ryzen (supports 7th Generation A-series / Athlon)

Max RAM Size

64 GB

RAM Supported

4 DIMM slots - DDR4, non-ECC, unbuffered

Storage Ports

4 x SATA-600 (RAID), 2 x SATA-600, 1 x M.2

USB / FireWire Ports

2 x USB 3.1 + 4 x USB 3.0 + (2 x USB 3.0 + 4 x USB 2.0 via headers)

Max Allocated RAM Size

2 GB


HD Audio (8-channel)


Gigabit Ethernet

Manufacturer Warranty

3 years warranty


Product Type

Motherboard - micro ATX

Chipset Type


Processor Socket

Socket AM4

Max Processors Qty


Compatible Processors

Athlon, A series, Ryzen (supports 7th Generation A-series / Athlon)

Supported RAM

Max Size

64 GB



Bus Clock

2400 MHz, 2133 MHz, 2666 MHz, 2933 MHz (O.C.), 3200 MHz (O.C.)

Supported RAM Integrity Check


Registered or Buffered



Dual channel memory architecture


Max Allocated RAM Size

2 GB



HD Audio (8-channel)

Audio Codec

Realtek ALC887

Compliant Standards

High Definition Audio


Network Controller

Realtek RTL8111H

Network Interfaces

Gigabit Ethernet

Expansion / Connectivity

Expansion Slots

1 x CPU 
4 x DIMM 288-pin 
1 x PCIe 3.0 x16 (x16 mode (with AMD Ryzen CPU); x8 mode (with AMD 7th Generation A-series/Athlon CPU)) 
2 x PCIe 2.0 x1

Storage Interfaces

SATA-600 -connectors: 4 x 7pin Serial ATA - RAID 0 / RAID 1 / RAID 10 
SATA-600 -connectors: 2 x 7pin Serial ATA 
SATA-600 / PCIe 3.0 -connectors: 1 x M.2


1 x LAN (Gigabit Ethernet) 
4 x USB 3.0 
1 x PS/2 keyboard 
1 x audio line-in - mini-jack 
1 x audio line-out - mini-jack 
1 x microphone - mini-jack 
1 x PS/2 mouse 
1 x VGA 
1 x DVI-D 
1 x HDMI 
2 x USB 3.1

Internal Interfaces

4 x USB 2.0 - header 
2 x USB 3.0 - header 
1 x serial - header 
1 x SPDIF out - header 
1 x audio - header

Power Connectors

24-pin main power connector, 8-pin ATX12V connector




BIOS Features

WfM 2.0 support, Multilingual BIOS, ASUS Quiet Thermal Solution, UEFI BIOS, ASUS EZ Flash 3, DMI 3.0 support, SMBIOS 3.0 support, ACPI 6.1 support

Hardware Features

ASUS Q-Design, ESD Guards, Q-DIMM, ASUS EZ DIY, Q-Slot, CrashFree BIOS 3, ASUS Fan Xpert, ASUS DIGI+ VRM, Fanless Design Heatsink, ASUS Stainless Steel Back I/O, Turbo LAN, LANGuard, ASUS Overvoltage Protection, Lighting Control, ASUS 5X Protection III, ASUS SafeSlot Core


Included Accessories

1 x M.2 screw, I/O back cover

Cables Included

2 x Serial ATA cable

Software Included

Drivers & utilities, ASUS AI Charger, ASUS AI Suite III, PC Cleaner

Compliant Standards

Plug and Play


9.6 in


9.4 in

Manufacturer Warranty

Service & Support

Limited warranty - 3 years 
Limited warranty - cross shipping

Manufacturer Warranty:  3 Year Limited

Manufacturer Return Information:  ASUS Warranty Support

EDI Returns Allowed:  Yes *Bent/Broken Pins or Physical Damage voids warranty

EDI Return Period (Days):  30

Master Box Qty:  10

UPC Code:  889349673584         


- Visit the Eastern Data customer service page for general company RMA policy