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Micro-ATX motherboard, green PCB, black slots, silver I/O shield

ASUS

ASUS Prime A320M-K AMD motherboard

SKU CH-KCE4-14R84

Micro-ATX AM4 board with dual DDR4 slots up to 32 GB, one PCIe 3.0 x16 slot, two PCIe 2.0 x1 slots, four SATA 6 Gb/s ports, an M.2 socket for 2242/2260/2280 drives, HDMI and VGA outputs.

  • CPU Socket TypeAM4
  • CPU TypeAMD AM4 Socket Ryzen with Radeon Vega Graphics / Ryzen 1st G
  • ChipsetAMD A320
  • Number of Memory Slots2x288pin (DDR4)
  • Memory StandardAMD Ryzen with Radeon Vega Graphics/ Ryzen 1st Generation Pr
  • Maximum Memory Supported32GB
  • Supports up to 32GB DDR4 memory for smooth multitasking
  • HDMI 1.4b output delivers 4096 x 2160 resolution at 24 Hz
  • M.2 slot accepts 2242, 2260 and 2280 drives with SATA or PCIe 3.0 x4
  • Four SATA 6Gb/s ports plus RAID 0, 1, 10 for flexible storage
  • Realtek RTL8111H Gigabit LAN ensures reliable wired connectivity

AM4 socket for Ryzen and Athlon builds

The ASUS Prime A320M-K is a Micro-ATX motherboard built around the AMD A320 chipset and the AM4 socket. It accepts Ryzen processors with integrated Radeon Vega graphics as well as 7th generation A-series and Athlon X4 CPUs. The board targets budget system builders who need essential modern connectivity in a compact form factor.

Two DDR4 slots supporting 32 GB maximum

Memory expansion is limited to two 288-pin DDR4 slots running in dual-channel mode with a 32 GB ceiling. Supported speeds reach DDR4 3200 and 2933 via overclocking on Ryzen 1st generation and Vega APUs, while 7th generation A-series and Athlon X4 processors top out at DDR4 2400. This capacity and slot count defines the upgrade ceiling for any build using this board.

DIGI+ VRM and Fan Xpert manage sustained loads

The onboard DIGI+ VRM regulates processor power delivery in real time, reducing energy draw and stabilising voltage during extended workloads. Fan Xpert provides advanced fan headers that adjust speeds based on system temperatures, helping the board maintain thermal equilibrium when the CPU and M.2 storage operate continuously under load.

Highlights

  • Supports up to 32GB DDR4 memory for smooth multitasking
  • HDMI 1.4b output delivers 4096 x 2160 resolution at 24 Hz
  • M.2 slot accepts 2242, 2260 and 2280 drives with SATA or PCIe 3.0 x4
  • Four SATA 6Gb/s ports plus RAID 0, 1, 10 for flexible storage
  • Realtek RTL8111H Gigabit LAN ensures reliable wired connectivity

Specifications

BrandASUS
ModelPrime A320M-K
CPU Socket TypeAM4
CPU TypeAMD AM4 Socket Ryzen with Radeon Vega Graphics / Ryzen 1st Generation / 7th Generation A-series /Athlon X4 Processors
ChipsetAMD A320
Number of Memory Slots2x288pin (DDR4)
Memory StandardAMD Ryzen with Radeon Vega Graphics/ Ryzen 1st Generation ProcessorsDDR4 3200(O.C.)/ 2933(O.C.)/ 2666/ 2400/ 2133 AMD 7th Generation A-Series/ Athlon X4 ProcessorsDDR4 2400/ 2133* Hyper DIMM support is subject to the physical characteristics of individual CPUs. * Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).
Maximum Memory Supported32GB
Channel SupportedDual Channel
PCI Express 3.0 x16AMD Ryzen 1st Generation Processors1 x PCIe 3.0/2.0 x16 (x16 or dual x8) AMD Ryzen with Radeon Vega Graphics / 7th Generation A-Series/Athlon X4 Processors1 x PCIe 3.0/2.0 x16 (x8 mode)
PCI Express x12 x PCIe 2.0 x1
Serial ATA (SATA)4 x SATA 6Gb/s port(s), gray
M.2AMD Ryzen with Radeon Vega Graphics/ Ryzen 1st Generation Processors: 1 x M.2 Socket 3, with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x4 mode)AMD 7th Generation A-series/Athlon Processors: 1 x M.2 Socket 3, with M Key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x2 mode)
SATA RAID0/1/10
Onboard Video ChipsetIntegrated Graphics in the AMD Ryzen with Radeon Vega Graphics/ 7th Generation A-Series APU Multi-VGA output support: HDMI/RGB ports - Supports HDMI 1.4b with max. resolution 4096 x 2160 @ 24 Hz / 2560 x 1600 @ 60 Hz- Supports RGB with max. resolution 1920 x 1200 @ 60 HzMaximum shared memory of 2048MB (for iGPU exclusively)
Audio ChipsetRealtek ALC887
Audio Channels8 Channels
LAN ChipsetRealtek RTL8111H
Max LAN Speed1Gbps
PS/21 x PS/2 keyboard (purple)1 x PS/2 mouse (green)
Video Ports1 x D-Sub
HDMI1 x HDMI
RJ451 x RJ45
USB 3.14 x USB 3.1 Gen 1 (blue)
USB 3.04 x USB 3.0 (blue)
USB 1.1/2.02 x USB 2.0
Audio Ports3 Ports
Onboard USB1 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 Connectors1 x COM port(s) connector(s)1 x CPU Fan connector(s) (1 x 4-pin)1 x Chassis Fan connector(s) (1 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
Form FactorMicro ATX
Dimensions (W x L)8.9" x 8.7"
Power Pin1 x 24-pin EATX Power connector(s)1 x 4-pin ATX 12V Power connector(s)
Windows 11Supported
FeaturesSpecial 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 designASUS Exclusive Features:- AI Suite 3- Ai Charger ASUS Quiet Thermal Solution:- Stylish Fanless Design Heat-sink solution- ASUS Fan Xpert ASUS EZ DIY:- ASUS CrashFree BIOS 3 - ASUS EZ Flash 3 - AS
Package ContentsAccessories:User's manualI/O Shield2 x SATA 6Gb/s cable(s)1 x M.2 Screw Package1 x Supporting DVD

Questions about this item

What does the 32 GB maximum memory mean for a build using this board?

The board has two DDR4 slots and supports up to 32 GB total, so you can install two 16 GB modules for the full capacity.

How does the M.2 slot's PCIe 3.0 x4 interface limit drive performance?

The M.2 socket runs at PCIe 3.0 x4, which caps sequential throughput at the PCIe 3.0 x4 ceiling for compatible NVMe drives.

What size case and mounting holes does this Micro-ATX board need?

The Micro-ATX form factor fits standard Micro-ATX or larger cases with the matching mounting hole pattern.

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