ASUS Prime B660M-K D4 LGA 1700 microATX Intel Motherboard two M.2 slots, DDR4

SKU: C08B17D4B660MK

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ASUS Prime B660M-K D4 Intel® B660 LGA 1700 mATX motherboard with PCIe 4.0, two M.2 slots, DDR4, Realtek 1Gb Ethernet, HDMI® , D-Sub, front USB 3.2 Gen 1, Asus Lighting Control

ASUS Prime B660M-K (LGA 1700) m-ATX motherboard with PCIe® 4.0, two M.2 slots, DDR4, HDMI®, D-Sub, Realtek 1Gb Ethernet, front USB 3.2 Gen 1, ASUS Lighting Control

VRM Heatsink and Thermal Pad

VRM heatsink and thermal pad improve heat transfer from the MOSFETs and chokes for better cooling performance.

Cooler by Design

Multiple Temperature Sources

4-Pin PWM/DC Fan

Power Design

Stable power is essential to extract every last bit of performance out of 12th Generation Intel processors. Prime B660M-K D4 is geared to cater to the demands of these high-core-count CPUs.

ProCool Connectors

6+1+1 Power Stages

DDR4 5333(OC)

Improvements to trace routing design provide the latest Intel processors with enhanced access to memory bandwidth. ASUS technology carefully maps memory signal pathways across different PCB layers to reduce path distance, and it adds shielding zones that significantly reduce crosstalk.

Two M.2 slots (up to 64 Gbps)

Prime B660M-K D4 offers a total of two M.2 slots that support data-transfer speeds of up to 64 Gbps via PCIe 4.0, enabling quicker boot-up and app load times with OS or application drives.

PCIe 4.0 Slot

Prime B660M-K D4 is designed specifically for 12th Generation Intel CoreTM CPUs and offer PCIe 4.0 connectivity. The wide bandwidth and superfast transmission speeds allow you to create feature-rich builds that can handle high loads effortlessly.

Lighting Control Brighten Up Your Build

With 5050 RGB strips connected to the RGB header, you can create your own stunning multicolor lighting displays with static, blinking, fading, and strobing effects.

Q-LED Core

The Q-LED Core display produces light patterns by power LED during the Power-On Self-Test (POST) that can help users troubleshoot potential issues.

SafeSlot Core

SafeSlot Core is the ASUS Prime B660M-K 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.


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Socket Compatibility

LGA 1700


4 x USB 3.2 Gen 1 ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) Front USB:Total 6 ports 1 x USB 3.2 Gen 1 2 x USB 2.0 header


Realtek 7.1 Surround Sound High Definition Audio – Supports: Jack-detection , – Supports up to 24-Bit/192 kHz playback" Audio Features – Audio Shielding – Premium audio capacitors – Dedicated audio PCB layers * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.


2x DIMM , Max. 64GB , DDR4 Up to 5333(OC) Dual Channel Memory Architecture


1 x D-Sub port 1 x HDMI® port** * Graphics specifications may vary between CPU types. Support 4K@60Hz as specified in HDMI® 2.1.

Expansion Slots

Intel® 12th Gen Processors 1 x PCIe 4.0/3.0 x16 slot Intel® B660 Chipset 2 x PCIe 3.0 x1 slots


1 x Realtek 1Gb Ethernet

Form Factor

microATX 24.4cm x 21.1cm

Operating System

Windows® 11 64-bit , Windows® 10 64-bit


Cables 2x SATA 6Gb/s cables Miscellaneous 1 x I/O Shield 2 x M.2 anchors Installation Media 1 x Support DVD Documentation 1 x User manual

Internal I/O Connectors

Fan and Cooling related 1 x 4-pin CPU Fan header 1 x 4-pin Chassis Fan header Power related 1 x 24-pin Main Power connector 1 x 8-pin +12V Power connector Storage related 2 x M.2 slots (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports 2 x USB 2.0 headers support additional 4 USB 2.0 ports Miscellaneous 1 x RGB header 1 x Clear CMOS header 1 x COM Port header 1 x Front Panel Audio header (AAFP) 1 x S/PDIF Out header 1 x Speaker header 1 x SPI TPM header (14-1pin) 1 x 10-1 pin System Panel header