PRIME B660M-K D4-CSM

Intel® B660 (LGA 1700) mATX 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

Intel^® LGA 1700 socket: Ready for 14^th, 13^th & 12^th gen Intel^® processors
Enhanced power solution: 8-pin ProCool connector, alloy chokes and durable capacitors for stable power delivery
Comprehensive cooling: VRM heatsink, PCH heatsink, hybrid fan headers and Fan Xpert
Ultrafast connectivity: PCIe^® 4.0, two M.2 slots and front USB 3.2 Gen 1
ASUS Control Center Express: Real-time IT monitoring and management software for enhanced data protection

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PRIME B660M-K D4-CSM motherboard, front view

ASUS Prime series motherboards are expertly engineered to unleash the full potential of 14^th, 13^th & 12^th Generation Intel^® processors. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, PRIME B660M-K D4-CSM provides users and PC DIY builders a range of performance tuning options via intuitive software and firmware features.

2 x USB 2.0 ports (type-A)
1 x HDMI^® port
1 x D-Sub port
4 x USB 3.2 Gen 1 ports (Type-A)
Realtek 1Gb Ethernet
3 x Audio Jacks
Expansion Slots
・1 x PCIe 4.0/3.0 x16 slot
・2 x PCIe 3.0 x1 slots
1 x RGB heatsink
2 x DIMM
DDR4 5333(OC)
Intel^® Socket LGA1700 for Intel^® Core™ 14^th & 13^th Gen Processors, Intel^® Core™ 12^th Gen, Pentium^® Gold and Celeron^® Processors
1 x USB 3.2 Gen 1 header
2 x M.2 slots
・M.2_1 slot (Key M) 2280 (PCIe 4.0 x4 mode)
・M.2_2 slot (Key M) 2280 (PCIe 4.0 x4 mode)
4 x SATA 6Gb/s ports
2 x USB 2.0 headers

ASUS Corporate Stable Model

ASUS Corporate Stable Model (CSM) is a commercial program designed to provide stable and reliable motherboards. Offering up to 36-month product lifecycle support and 6-month end-of-life notice to allow sufficient lead times for your organization to get ready for product transitions. Each purchase of an ASUS CSM motherboard comes with ASUS Control Center Express - server-grade IT management software.

* Lifecycle support, program offering and supply status may vary by region. Please consult your local sales representative for more information.

Learn more about ASUS CSM program

ASUS Control
Center Express

ASUS Control Center Express is an integrated IT monitoring and management software designed to deploy faster, simplify IT operations and improve productivity with comprehensive control and user-friendly functions. ASUS Control Center Express is compatible with over 100 ASUS motherboards to provide a high-quality, TCO-optimized solution for your business needs.

Learn more about ASUS Control Center Express

Optimize IT endpoint management

Designed to assist IT staff in monitoring and controlling devices within their corporate networks, and facilitate inventory checking in multiple locations remotely

Automate IT maintenance

Allows IT staff to schedule automatic updates of the latest BIOS, software and utilities to specific or all devices at off-peak times, enhancing system stability and IT operational flexibility

Securely manage all of endpoints

Securely manage endpoint configuration, portable storage access and PC software applications by enabling them to create grouping rules on individual devices

FLEXIBILITY

Comprehensive controls form the foundation of the ASUS Prime series. The Prime B660 motherboard packs flexible tools to tune every aspect of your system, enabling performance tweaks to perfectly match the way you work to maximize productivity.

Intelligent Control

All-Around Energy Efficiency

The Energy Processing Unit (EPU) automatically optimizes power consumption and maximizes energy savings with Away mode — a smart setting that creates an extreme energy-saving scenario by shutting down unused I/O controllers.

Flexible Air- and Liquid-Cooling Controls

ASUS Fan Xpert software provides comprehensive control over fan. There’s an Extreme Quiet mode that reduces fan speeds to below the default minimum to keep your system whisper-quiet when performing light tasks. Fan can also be controlled via the UEFI BIOS.

Precise Digital Power Control

The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings. It also allows you to fine-tune your CPU for ultimate stability and performance.

UEFI BIOS

The renowned ASUS UEFI BIOS provides everything you need to configure, tweak and tune your system. It offers intelligently simplified options for PC DIY beginners, as well as comprehensive features for seasoned veterans.

Advanced Tuning for Serious Tweakers

An intuitive Advanced mode offered via the UEFI lets you take complete control. A built-in search feature makes it easy to find options, and various advanced functions let you intelligently make nuanced adjustments so you can dial in performance just the way you want.

Search Function

Quickly and easily find the option or setting you need.

ASUS User Profile

Port configuration settings between different BIOS versions or share them with friends.

Quick and Simple Setup

EZ mode displays vital settings and stats and also offers guided wizards, drag-and-drop functionality, and one-click application of important settings — all to help you get your rig up and running in no time.

Intuitive Graphical Fan Control

Fine-tune individual fan settings simply by dragging a curve with the mouse.

EZ XMP

Improve DRAM performance with one click.

COOLING

Prime B660 series are engineered with multiple onboard heatsinks and an array of hybrid fan headers to ensure your rig stays cool and stable under intense workloads.

Heatsinks

VRM Heatsink and Thermal Pad

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

Prime motherboard with VRM heatsink image

Cooler by Design

Prime B660 series feature comprehensive cooling controls that are configurable via Fan Xpert software or via the UEFI BIOS.

Prime motherboard with 4-Pin PWM/DC Fan image

Multiple Temperature Sources

Each header can dynamically reference three thermal sensors. Fan Xpert allows you to map the temperature of supported ASUS graphics cards to optimize cooling for GPU- and CPU-intensive tasks.

4-Pin PWM/DC Fan

The chassis fan header supports auto-detection of PWM or DC fans.

PERFORMANCE

Prime B660 series are built to handle the additional cores and increased bandwidth of 14^th, 13^th & 12^th Generation Intel^® processors. ASUS B660 motherboards provide all the fundamentals to boost daily productivity, so your system will be ready for action with stable power, intuitive cooling and flexible transfer options.

Power Design

Stable power is essential to extract every last bit of performance out of Intel^® processors. PRIME B660M-K D4-CSM is geared to cater to the demands of these high-core-count CPUs.

ProCool Connectors

Proprietary connectors augment the motherboard's link to the PSU with 8 pin connectors that pass 12 volts of power directly to the processors. Each jack features solid pins that can handle more current than hollow-pin connectors.

6+1+1 Power Stages

A VRM with 6+1+1 Power Stages delivers the power and efficiency that the latest Intel processors demand.

Memory

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.

Storage

Two M.2 slots (up to 64 Gbps)

PRIME B660M-K D4-CSM 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.

* Actual transmission speeds will be lower than the theoretical maximum speed.

Connectivity

PCIe^® 4.0 Slot

PRIME B660M-K D4-CSM is designed specifically for 14^th, 13^th & 12^th Generation Intel^® Core^TM 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.

Realtek 1 Gb Ethernet

Realtek 1 Gb Ethernet reduces CPU overhead and offers exceptionally high TCP and UDP throughput for faster, smoother data transfer.

Lower CPU workload

High TCP and UDP throughput

CUSTOMIZATION

Prime B660 series add the nuanced details that improve every experience, from exclusive codecs that provide pristine audio quality to intuitive RGB lighting controls that let you customize your system to create a uniquely personal look.

Audio

Combined onboard features deliver elevated audio

Intelligent design and premium hardware create audio quality unlike anything you’ve ever experienced.

Audio Shielding

Separates analog/digital signal domains, significantly reducing multi-lateral interference.

Separate Layer for Left and Right Tracks

Ensures minimal crosstalk between audio paths.

Premium Audio Capacitors

Premium parts provide an immersive sound signature, with exceptional fidelity.

Personalization

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.

* The RGB-strip header supports 5050 RGB LED strips with a max power rating of 3A (12V). For maximum brightness, strip length should not exceed 3m.
** RGB LED Strips are sold separately.

Armoury Crate

Armoury Crate is a new software utility designed to give you centralized control of supported products. From a single intuitive interface. The software also provides control of settings for an ever-growing number of ASUS products, including keyboard and mouse preferences. Armoury Crate even features dedicated product registration and news to help you stay in touch with the ASUS community.
DOWNLOAD NOW

DIY Friendly

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.

No DRAM Detected

Fast blinking

4 Hz (0.25s)

No VGA Detected

Slow blinking

1/2 Hz (2s)

No Boot Device Detected

Very slow blinking

1/8 Hz (8s)

Installation Completed

Solid light

SafeSlot Core

SafeSlot Core is the ASUS-exclusive 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.

LANGuard

Pumped-up throughput 2.5X higher surge tolerance

ASUS LANGuard is a hardware-level network protection feature that integrates advanced signal-coupling technology and premium anti-EMI surface-mounted capacitors to improve throughput and ensure a more reliable connection.

Overvoltage Protection

World-class circuit-protecting power design

An exclusive circuit design with built-in voltage regulators to protect your motherboard from damage caused by unexpected high-level voltages from unstable or inferior power supplies.

DRAM Overcurrent Protection

Short-circuit damage prevention

Onboard resettable fuses prevent overcurrent and short-circuit damage. This extends beyond I/O ports to DRAM to safeguard the lifespan of your system and connected devices.

Stainless-Steel Back I/O

3X corrosion-resistance for greater durability

Corrosion-resistant stainless-steel back I/O panels bonded with chromium oxide have a lifespan that's three times longer than ordinary panels.

1000+
Compatible devices and components

The Prime H670 series provides superior compatibility with thousands of components and our memory support list identifies memory compatibility, giving you more choices for worry-free PC-building experiences.

8000+
Validation hours

Every ASUS motherboard is subjected to more than 8,000 hours of stringent tests, including burn-in, environmental, compatibility, software and safety tests to confirm their durability. ASUS reliability surpasses industry standards, ensuring that every component is designed to function flawlessly in any environment.

Temperature and humidity tests

Ensures components withstand extreme conditions.

Thermal measurement tests

Ensures that the system remains cool and stable under the heaviest loads.

Insertion tests

Every port and connector is put through repeated installation cycles.

Aging tests

Up to 48-hour aging test ensures reliability.

Power-consumption tests

Checked for world-class energy efficiency.

Temperature and DC margin tests

Ensures that the motherboard is capable of coping with voltages fluctuations caused by varying temperatures.

Thermal-shock tests

Ensures ability to survive temperature changes during transportation.

Non-operation shock tests

Built to withstand jolts that may occur during shipping.

Burn-in tests

Every component is checked to ensure flawless operation.

Installation tests

Connector placement is double-checked to ensure hassle-free installation.

Drop tests

Drop tests from various heights ensure durability.

Salt and spray tests

Tested for I/O reliability, prolonged lifespan and rust-resistance.

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Dual-chamber chassis with independent cooling zones for GPU and CPU
Boundless panoramic design offers a fully unobstructed view
Front panel high-speed USB Type-C^® for high-speed data transfers
Tool-free side panels
Fully modular design

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TUF Gaming ARGB PWM Fan Hub

Control up to six case fans
PWM fan and RGB controller
Visible power and operation indicators
Simple magnetic mounting
Dual SATA power connector
Two safety fuses

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TUF Gaming ARGB Lighting Kit for GT502 Horizon Series

TUF Gaming ARGB Lighting Kit for GT502 Horizon Series

Vibrant System Lighting
Magnetic Design
Up to 20,000 Hours of Durability
Aura Sync
Black and white

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ASUS AR120 ARGB PWM Single Pack

Extra-thick 28mm frame
Hydraulic Bearing
PWM control
Aura Sync compatible

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TUF Gaming AS1000 PLUS

Ultrafast transfer speed - Up to 20 Gbps
IP68 water and dust resistance
MIL-STD-810H 516.8 drop resistance
Aluminum alloy chassis provides exceptional cooling
USB-C^® 3.2 Gen 2x2

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ASUS A23 Case

Hidden Connectors
Broad Compatibility
Standoff-mounted tempered-glass front panel
Ample cable management space

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TUF Gaming TR120 ARGB Fan - Triple Pack

Extreme cooling with an extra-thick 28mm frame
Class-leading static pressure at 3.3mm H2O
Due side patterns on the frame
Available in black and white and in standard and reverse orientation
Aura Sync compatible

Learn more

ASUS A21 PLUS Case

Hidden Connectors
Broad Compatibility
Capable Cooling
Cable management space
Color matching cable

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TUF Gaming GT302 ARGB

Extreme cooling with four 140x28 ARGB fans
Interchangeable side panel
Removable top panel
Support motherboards' hidden connectors design
Support 360 AIO on top and 40-series graphics cards

Learn more

ASUS A21 Case

Broad Compatibility
Capable Cooling
Cable management space
Color matching cable

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ASUS Prime AP201 Tempered Glass MicroATX Case

ASUS Prime AP201 Tempered Glass MicroATX Case

Industry-leading spatial efficiency
Tool-free side panels
32 mm wide cable-management
Front panel USB Type-C^® support
Color-matched cables

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ASUS Prime AP201 MicroATX Case

Quasi-filter mesh panels
Industry-leading spatial efficiency
Tool-free side panels
32 mm wide cable-management
Front panel USB Type-C^® support

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PRIME B660M-K D4-CSM

PRIME B660M-K D4-CSM

ASUS Corporate Stable Model

* Lifecycle support, program offering and supply status may vary by region. Please consult your local sales representative for more information.

Learn more about ASUS CSM program

ASUS ControlCenter Express

Learn more about ASUS Control Center Express

Optimize IT endpoint management

Designed to assist IT staff in monitoring and controlling devices within their corporate networks, and facilitate inventory checking in multiple locations remotely

Automate IT maintenance

Allows IT staff to schedule automatic updates of the latest BIOS, software and utilities to specific or all devices at off-peak times, enhancing system stability and IT operational flexibility

Securely manage all of endpoints

Securely manage endpoint configuration, portable storage access and PC software applications by enabling them to create grouping rules on individual devices

.clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; } FLEXIBILITY .clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; }

Comprehensive controls form the foundation of the ASUS Prime series. The Prime B660 motherboard packs flexible tools to tune every aspect of your system, enabling performance tweaks to perfectly match the way you work to maximize productivity.

Intelligent Control

All-Around Energy Efficiency

The Energy Processing Unit (EPU) automatically optimizes power consumption and maximizes energy savings with Away mode — a smart setting that creates an extreme energy-saving scenario by shutting down unused I/O controllers.

Flexible Air- and Liquid-Cooling Controls

ASUS Fan Xpert software provides comprehensive control over fan. There’s an Extreme Quiet mode that reduces fan speeds to below the default minimum to keep your system whisper-quiet when performing light tasks. Fan can also be controlled via the UEFI BIOS.

Precise Digital Power Control

The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings. It also allows you to fine-tune your CPU for ultimate stability and performance.

UEFI BIOS

The renowned ASUS UEFI BIOS provides everything you need to configure, tweak and tune your system. It offers intelligently simplified options for PC DIY beginners, as well as comprehensive features for seasoned veterans.

Advanced Tuning for Serious Tweakers

An intuitive Advanced mode offered via the UEFI lets you take complete control. A built-in search feature makes it easy to find options, and various advanced functions let you intelligently make nuanced adjustments so you can dial in performance just the way you want.

Search Function

Quickly and easily find the option or setting you need.

ASUS User Profile

Port configuration settings between different BIOS versions or share them with friends.

Quick and Simple Setup

EZ mode displays vital settings and stats and also offers guided wizards, drag-and-drop functionality, and one-click application of important settings — all to help you get your rig up and running in no time.

Intuitive Graphical Fan Control

Fine-tune individual fan settings simply by dragging a curve with the mouse.

EZ XMP

Improve DRAM performance with one click.

.clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; } COOLING .clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; }

Prime B660 series are engineered with multiple onboard heatsinks and an array of hybrid fan headers to ensure your rig stays cool and stable under intense workloads.

Heatsinks

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

Prime B660 series feature comprehensive cooling controls that are configurable via Fan Xpert software or via the UEFI BIOS.

Multiple Temperature Sources

Each header can dynamically reference three thermal sensors. Fan Xpert allows you to map the temperature of supported ASUS graphics cards to optimize cooling for GPU- and CPU-intensive tasks.

4-Pin PWM/DC Fan

The chassis fan header supports auto-detection of PWM or DC fans.

.clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; } PERFORMANCE .clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; }

Power Design

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

ProCool Connectors

Proprietary connectors augment the motherboard's link to the PSU with 8 pin connectors that pass 12 volts of power directly to the processors. Each jack features solid pins that can handle more current than hollow-pin connectors.

6+1+1 Power Stages

A VRM with 6+1+1 Power Stages delivers the power and efficiency that the latest Intel processors demand.

Memory

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.

Storage

Two M.2 slots (up to 64 Gbps)

PRIME B660M-K D4-CSM 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.

Connectivity

PCIe® 4.0 Slot

PRIME B660M-K D4-CSM is designed specifically for 14th, 13th & 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.

Realtek 1 Gb Ethernet

Realtek 1 Gb Ethernet reduces CPU overhead and offers exceptionally high TCP and UDP throughput for faster, smoother data transfer.

.clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; } CUSTOMIZATION .clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; }

Prime B660 series add the nuanced details that improve every experience, from exclusive codecs that provide pristine audio quality to intuitive RGB lighting controls that let you customize your system to create a uniquely personal look.

Audio

Combined onboard features deliver elevated audio

Intelligent design and premium hardware create audio quality unlike anything you’ve ever experienced.

Audio Shielding

Separates analog/digital signal domains, significantly reducing multi-lateral interference.

Separate Layer for Left and Right Tracks

Ensures minimal crosstalk between audio paths.

Premium Audio Capacitors

Premium parts provide an immersive sound signature, with exceptional fidelity.

Personalization

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.

Armoury Crate

ASUS Control
Center Express

FLEXIBILITY

COOLING

PERFORMANCE

Stable power is essential to extract every last bit of performance out of Intel^® processors. PRIME B660M-K D4-CSM is geared to cater to the demands of these high-core-count CPUs.

PRIME B660M-K D4-CSM 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-CSM is designed specifically for 14^th, 13^th & 12^th Generation Intel^® Core^TM 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.

CUSTOMIZATION

Lighting Control
Brighten Up Your Build

SafeSlot Core is the ASUS-exclusive 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.

1000+
Compatible devices and components

8000+
Validation hours