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Green micro-ATX motherboard with black AM4 socket, two DDR4 slots, one full-length PCIe x16 slot, two short PCIe x1 slots

Biostar

Biostar A320MH AMD motherboard

SKU CH-RVW0-XDX91

Micro-ATX AM4 board with A320 chipset, dual-channel DDR4 up to 2933 MHz, one PCIe 3.0 x16 slot, four SATA 6Gb/s ports and Realtek 7.1 audio

  • CPU Socket TypeAM4
  • CPU TypeSupports AMD AM4 Socket for 3rd, 2nd and 1st Gen Ryzen / 2nd
  • ChipsetAMD A320
  • Number of Memory Slots2x288pin (DDR4)
  • Memory StandardDDR4 2933/ 2667/ 2400/ 2133/ 1866 MHz Support Non-ECC & ECC
  • Maximum Memory Supported32GB
  • Broad CPU choice with AM4 socket for Ryzen and Athlon processors
  • Fast dual-channel DDR4 memory up to 2933 MHz supported
  • Flexible RAM options including ECC and non-ECC unbuffered DIMMs
  • Four SATA 6Gb/s ports with RAID 0, 1 and 10
  • 1-channel Realtek ALC887 audio and gigabit LAN

Socket AM4 foundation

The Biostar A320MH is a micro ATX motherboard built around the AMD A320 chipset. It accepts AM4 processors from first, second and third generation Ryzen families as well as compatible Athlon and A-Series APUs with Radeon graphics. Two 288-pin DDR4 slots support dual-channel memory up to 32 GB at speeds from 1866 to 2933 MHz depending on the CPU installed.

Budget builders and upgraders

This board suits cost-conscious builders assembling a basic home or office system and owners of older AM4 CPUs who need a replacement board. It is less suited for enthusiasts who want overclocking headroom, multiple high-speed M.2 drives or more than one full-length graphics card because the A320 chipset and the single PCI-E 3.0 x16 slot limit those options.

Essential I/O and protection

Four SATA 6Gb/s ports with RAID 0, 1 and 10 give straightforward storage expansion for hard drives or SATA SSDs. Realtek ALC887 provides 7.1-channel audio while Realtek RTL8111H delivers 1 Gbps wired networking. Two PCI-E 2.0 x1 slots remain free for add-in cards such as Wi-Fi adapters or extra USB controllers.

Highlights

  • Broad CPU choice with AM4 socket for Ryzen and Athlon processors
  • Fast dual-channel DDR4 memory up to 2933 MHz supported
  • Flexible RAM options including ECC and non-ECC unbuffered DIMMs
  • Four SATA 6Gb/s ports with RAID 0, 1 and 10
  • 1-channel Realtek ALC887 audio and gigabit LAN

Specifications

BrandBIOSTAR
SeriesBiostar A320MH
ModelA320MH
CPU Socket TypeAM4
CPU TypeSupports AMD AM4 Socket for 3rd, 2nd and 1st Gen Ryzen / 2nd and 1st Gen Ryzen with Radeon Vega Graphics / Athlon with Radeon Vega Graphics / 7th Gen A-Series/Athlon X4 Processors
ChipsetAMD A320
Number of Memory Slots2x288pin (DDR4)
Memory StandardDDR4 2933/ 2667/ 2400/ 2133/ 1866 MHz
Support Non-ECC & ECC Un-buffered DIMM Memory modules
* DDR4 2933 for AMD Ryzen CPU
* DDR4 speed depends on CPU type
Maximum Memory Supported32GB
Channel SupportedDual Channel
PCI Express 3.0 x161 x PCI-E 3.0 x16 Slot (x16 for Ryzen CPU only, NPU/APU run at x8 speed)
PCI Express x161 x PCI Express x16
PCI Express x12 x PCI-E 2.0 x1 Slots
Serial ATA (SATA)4 x SATA 6Gb/s
SATA RAID0/1/10
Onboard Video ChipsetSupported only by CPU with integrated graphic
Audio ChipsetRealtek ALC887
Audio Channels7.1 Channels
LAN ChipsetRealtek RTL8111H
Max LAN Speed1Gbps
Back I/O Ports1 x PS/2 Keyboard/Mouse
2 x USB 3.2 Gen1 Ports
4 x USB 2.0 Ports
1 x HDMI Connector, resolution up to 4096 x 2160 @24Hz or 3840 x 2160 @30Hz
1 x VGA Port, resolution up to 1920 x 1200 @60Hz
1 x LAN Port
3 x Audio Jacks
USB 3.04 x USB 3.0
Onboard USB1 x USB 3.2 Gen1 Header
2 x USB 2.0 Headers
Other Connectors1 x Front Audio Header
1 x Front Panel Header
1 x CPU Fan Connector
1 x System Fan Connector
1 x COM Port Header
Form FactorMicro ATX
LED LightingNone RGB
Dimensions (W x L)8.9" x 6.9"
Windows 11Supported
FeaturesSupport AMD Ryzen CPU / APU
AMD A320 single chip architecture
Support 2-DIMM DDR4-2933/ 2667/ 2400/ 2133/ 1866 up to 32G maximum capacity
Support HDMI
Support USB 3.2 Gen1
Package ContentsACCESSORIES:
2 x SATA Cable
1 x I/O Shield
1 x DVD Driver
1 x Quick Guide

Questions about this item

Which AMD Ryzen processor generations fit the AM4 socket on this Biostar A320MH?

The board supports 1st, 2nd and 3rd Gen Ryzen CPUs, plus Ryzen with Radeon Vega Graphics, Athlon with Radeon Vega Graphics and 7th Gen A-Series or Athlon X4 chips.

Will a PCIe 3.0 graphics card run at full x16 speed if I pair it with a Ryzen CPU on the single x16 slot?

Yes — the PCIe 3.0 x16 slot operates at x16 with a Ryzen CPU; APUs run the same slot at x8.

How can I confirm the Realtek ALC887 audio is delivering 7.1-channel output after assembly?

Open Windows Sound control panel, select the Realtek device, choose 7.1 in the speaker-configuration test and verify all eight channels play tones.

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