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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

  • ProcessorIntel Socket 1151 for 9th/8th Generation Core i7/i5/i3 / Pen
  • ChipsetIntel B365
  • Form factorMicro ATX
  • CPU socketLGA 1151 (300 Series)
  • CPU technologiesSupports Intel Turbo Boost Technology 2.0* The Intel Turbo B
  • Onboard video chipIntegrated Graphics Processor - Intel HD Graphics supportMul
  • 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.

How it compares

Measured against everything we stock in Motherboards for Intel CPUs, at today’s prices. Recalculated every night.

Price $60.99
Cheaper than about 77% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameASUS
Model namePRIME B365M-A
Processor
ProcessorIntel Socket 1151 for 9th/8th Generation Core i7/i5/i3 / Pentium / Celeron Processors* Not backward compatible with older generation of LGA 1151 CPUs
CPU socketLGA 1151 (300 Series)
ChipsetIntel B365
CPU technologiesSupports Intel Turbo Boost Technology 2.0* The Intel Turbo Boost Technology 2.0 support depends on the CPU types.
Memory
Memory slot count4 × 288pin (DDR4)
Max supported RAM64 GB
Memory channelsDual Channel
Storage
SATA ports6 x SATA 6Gb/s port(s), gray
M.2 slots1 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)
Optane memory supportYes
SATA and RAID support0/1/5/10
Audio & video
Audio chipRealtek ALC887
Sound channels8 Channels* Choose the chassis with HD audio module in front panel to support 8-channel audio output.
Connectivity
Ethernet controllerRealtek RTL8111H
Maximum network speed1 Gbit/s
Ports & slots
PCIe 3.0 x16 slots1 x PCIe 3.0 x16 (x16 mode)
PCIe x1 slots2 x PCIe 3.0/2.0 x1
Rear panel 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 × 8-channel Audio I/O
Power
Power connectors1 × 24-pin EATX Power connector(s)1 × 8-pin EATX 12 V Power connectors
Size & build
Form factorMicro ATX
Width and length9.6 in × 8.6 in
Compatibility
Windows 11 supportSupported
In the box
In the boxAccessories:User's manualI/O Shield2 x SATA 6Gb/s cable(s)2 x M.2 screws1 x Supporting DVD
More details
LightingRGB

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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