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Green mATX motherboard with silver sockets and black heatsinks

ASUS

ASUS PRIME B365M-A Intel motherboard

SKU CH-1M4G-AJ8HY

An mATX board for 9th and 8th Gen Intel CPUs with DDR4 2666 memory, one M.2 slot and HDMI 1.4b output

  • CPU Socket TypeLGA 1151 (300 Series)
  • CPU TypeIntel Socket 1151 for 9th/8th Generation Core i7/i5/i3 / Pen
  • Supported CPU TechnologiesSupports Intel Turbo Boost Technology 2.0* The Intel Turbo B
  • ChipsetIntel B365
  • Onboard Video ChipsetIntegrated Graphics Processor - Intel HD Graphics supportMul
  • Number of Memory Slots4x288pin (DDR4)
  • Supports 9th and 8th Gen Intel Core processors with LGA 1151 socket
  • Dual-channel DDR4 memory up to 2666 MHz across four slots for 64 GB capacity
  • M.2 Socket 3 with M key accepts 2242 2260 2280 drives in SATA and PCIe 3.0 x4 modes
  • HDMI 1.4b output delivers 4096 x 2160 at 30 Hz for integrated graphics
  • Realtek ALC887 8-channel audio and RTL8111H LAN provide onboard sound and networking

LGA 1151 motherboard for 8th and 9th Gen Intel

The ASUS PRIME B365M-A is a micro-ATX board built around the Intel B365 chipset. It accepts LGA 1151 processors from the 8th and 9th Generation Core i7, i5, i3, Pentium and Celeron families. The socket is not backward compatible with earlier LGA 1151 CPUs. Four 288-pin DDR4 slots support dual-channel memory up to 64 GB at 2666 MHz.

Build quality and daily connectivity

The board provides a full set of display outputs including HDMI 1.4b, DVI-D and D-Sub for integrated graphics. Six SATA 6 Gb/s ports and one M.2 Socket 3 with M key accept 2242, 2260 and 2280 drives in both SATA and PCIe 3.0 x4 modes. An Aura Sync RGB header allows lighting control, while the Realtek ALC887 codec delivers 8-channel audio when paired with a compatible front panel.

Practical limits of the B365 platform

PCIe 3.0 x16 is limited to a single full-length slot running at x16, with two additional x1 slots for add-in cards. Memory speeds above 2666 MHz will run at 2666 MHz on 8th Generation 6-core or higher processors. Intel Optane Ready support is included, and SATA RAID 0, 1, 5 and 10 are available. The Realtek RTL8111H LAN controller provides standard wired networking.

Highlights

  • Supports 9th and 8th Gen Intel Core processors with LGA 1151 socket
  • Dual-channel DDR4 memory up to 2666 MHz across four slots for 64 GB capacity
  • M.2 Socket 3 with M key accepts 2242 2260 2280 drives in SATA and PCIe 3.0 x4 modes
  • HDMI 1.4b output delivers 4096 x 2160 at 30 Hz for integrated graphics
  • Realtek ALC887 8-channel audio and RTL8111H LAN provide onboard sound and networking

Specifications

BrandASUS
ModelPRIME B365M-A
CPU Socket TypeLGA 1151 (300 Series)
CPU TypeIntel Socket 1151 for 9th/8th Generation Core i7/i5/i3 / Pentium / Celeron Processors* Not backward compatible with older generation of LGA 1151 CPUs
Supported CPU TechnologiesSupports Intel Turbo Boost Technology 2.0* The Intel Turbo Boost Technology 2.0 support depends on the CPU types.
ChipsetIntel B365
Onboard Video ChipsetIntegrated Graphics Processor - Intel HD Graphics supportMulti-VGA output support: HDMI/DVI-D/D-Sub ports- Supports HDMI 1.4b with max. resolution 4096 x 2160 @ 30 Hz- Supports DVI with max. resolution 1920 x 1200 @ 60 Hz- Supports D-sub with max. resolution 1920 x 1200 @ 60 HzMaximum shared memory of 1024MB (for iGPU exclusively)Supports Intel InTru 3D, Quick Sync Video, Clear Video HD Technology, Insider
Number of Memory Slots4x288pin (DDR4)
Memory StandardDDR4 2666/ 2400/ 2133 MHz Non-ECC, Un-buffered Memory* The maximum memory frequency supported varies by processor** DDR4 2666 MHz and higher memory modules will run at max. 2666 MHz on Intel 8th Gen. 6-core or higher processors
Maximum Memory Supported64GB
Channel SupportedDual Channel
PCI Express 3.0 x161 x PCIe 3.0 x16 (x16 mode)
PCI Express x12 x PCIe 3.0/2.0 x1
Serial ATA (SATA)6 x SATA 6Gb/s port(s), gray
M.21 x M.2 Socket 3, with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x4 mode)1 x M.2 Socket 3, with M key, type 2242/2260/2280 storage devices support (PCIE 3.0 x4 mode)
Intel Optane ReadyYes
SATA RAID0/1/5/10
Audio ChipsetRealtek ALC887
Audio Channels8 Channels* Choose the chassis with HD audio module in front panel to support 8-channel audio output.
LAN ChipsetRealtek RTL8111H
Max LAN Speed1Gbps
Back I/O Ports1 x PS/2 keyboard (purple)1 x PS/2 mouse (green)1 x DVI-D1 x D-Sub1 x HDMI1 x LAN (RJ45) port(s)1 x USB 3.1 Gen 1 USB Type-C up to 5Gbps4 x USB 3.1 Gen 1 Type-A1 x 8-channel Audio I/O
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 Aura RGB Strip Header1 x TPM header1 x LPT header1 x COM port(s) connector(s)1 x CPU Fan connector(s)2 x Chassis Fan connector(s)1 x S/PDIF out header(s)1 x Front panel audio connector(s) (AAFP)1 x Clear CMOS jumper(s)1 x System panel connector1 x Chassis intrusion header1 x Speaker connector
Windows 11Supported
Form FactorMicro ATX
LED LightingRGB
Dimensions (W x L)9.6" x 8.6"
Power Pin1 x 24-pin EATX Power connector(s)1 x 8-pin EATX 12V Power connectors
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: Premium components provide better power efficiencyASUS OptiMem:- Optimem (Improved DDR4 stability)ASUS EPU:- EPUASUS Exclusive Features:- AI Suite 3- Ai Charger- PC CleanerASUS Quiet Thermal Solution:- Stylish Fanless Desig
Package ContentsAccessories:User's manualI/O Shield2 x SATA 6Gb/s cable(s)2 x M.2 screws1 x Supporting DVD

Questions about this item

What PCIe version does the single x16 slot run at, and what speed does that cap a graphics card to?

The board provides one PCIe 3.0 x16 slot wired at x16 mode, so a graphics card is limited to PCIe 3.0 bandwidth.

What case form factor and mounting pattern does the mATX board require?

The micro-ATX form factor fits any case with mATX or ATX mounting holes and a standard I/O shield cutout.

How is the M.2 drive secured, and which screw do builders often forget?

The M.2 Socket 3 M-key slot accepts 2242, 2260 and 2280 drives; the tiny retention screw that threads into the motherboard standoff is the step most often missed.

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