PRIME B660M-A D4-CSM

Intel® B660 (LGA 1700) mATX motherboard with PCIe 4.0, two M.2 slots, Intel® 1Gb Ethernet, DP,2 x HDMI®, rear USB 3.2 Gen 2, front USB 3.2 Gen 1 Type-C, Aura Sync

Intel^® LGA 1700 socket: Ready for 14^th, 13^th & 12^th Gen Intel^® processors
Ultrafast connectivity: PCIe 4.0, Intel^® 1 Gb Ethernet ,rear USB 3.2 Gen 2 Type-A and front USB 3.2 Gen 1 Type-A and Type-C^®
ASUS OptiMem II: Careful routing of traces and vias, plus ground layer optimizations to preserve signal integrity for improved memory overclocking
Comprehensive cooling: VRM heatsink, M.2 heatsink, PCH heatsink, hybrid fan headers and Fan Xpert 2+
ASUS Control Center Express(ACCE) to make IT endpoint management easier

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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 B660 provides users and PC DIY builders a range of performance tuning options via intuitive software and firmware features.

ASUS PRIME B660M-A D4-CSM offers a sleek, futuristic-looking build with a black and white finish, space-shuttle-inspired design elements, metallic nameplate and PCB cover.

1 x DisplayPort
2 x HDMI^® ports
2 x USB 2.0 ports(Type-A)
PS/2 combo port
2 x USB 3.2 Gen2 ports(Type-A)
2 x USB 2.0 ports(Type-A)
Intel^® 1G Ethernet
3 x Audio Jacks
Expansion slots
・1 x PCIe 4.0 x16 SafeSlot core+
・2 x PCIe 3.0 x16
1 x LPT header
2 x AURA Addressable Gen 2 headers
4 x DIMM
・DDR4 5333 (OC)
・Dual Channel
・OptiMem II
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 Type-C^®
1 x USB 3.2 Gen 1 header
2 x M.2 slots
・1 x M.2 2280 (PCIe 4.0 x4 mode)
・1 x M.2 2280 (PCIe 4.0 x4 mode)
- Intel^® Optane™ Memory Ready
1 x AURA Addressable Gen 2 header
1 x AURA RGB header
1 x USB 3.2 Gen 1 header

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 2+ software provides comprehensive control over fans, water pumps and all-in-one (AiO) coolers. Whether cooling with air or water, an Auto-Tuning mode intelligently configures all parameters with a single click. There’s also an Extreme Quiet mode that reduces all fan speeds to below the default minimum to keep your system whisper-quiet when performing light tasks. Fans, water pumps and AiO coolers 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.

EZ XMP

Improve DRAM performance with one click.

Intuitive Graphical Fan Control

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

Aura On/Off Mode (Stealth)

Easily enable or disable Aura RGB lighting or every onboard LED, for a subdued aesthetic touch.

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

M.2 Heatsink

M.2 heatsink wards off throttling that can occur with M.2 storage during sustained transfers. The heatsink is held in place by captive screws.

Removable captive screws reduce risk of drops or loss during heatsink removal.

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 2+ software or via the UEFI BIOS.

Prime motherboard with multiple temperature sources image

Prime motherboard with smart protection image

Prime motherboard with 4-Pin PWM/DC Fan image

Multiple Temperature Sources

Each header can dynamically reference three thermal sensors. Fan Xpert 2+ allows you to map the temperature of supported ASUS graphics cards to optimize cooling for GPU- and CPU-intensive tasks.

Smart Protection

A dedicated integrated circuit protects each fan header from overheating and overcurrent.

4-Pin PWM/DC Fan

Each onboard 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.

Robust Power Design

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

ProCool Connector

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

Memory

ASUS OptiMem II

Revisions to the motherboard’s trace routing provide the latest Intel processors with unrestricted access to memory bandwidth. ASUS OptiMem II technology carefully maps memory signal pathways across different PCB layers to reduce vias and adds shielding zones that significantly reduce crosstalk.

Benefits of ASUS OptiMem II:

Improved memory stability and compatibility
Allows lower memory latencies at equivalent voltages
Improved memory frequency margin

Motherboards with OptiMem II technology were tested with Synopsys HSPICE simulation software
Top layer – ground ring to prevent lateral interference

DDR4 5333(OC)

Improvements to trace routing design provide the latest Intel processors with enhanced access to memory bandwidth. ASUS OptiMem II 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-A 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 B660 motherboards are designed specifically for 14^th, 13^th & 12^th Generation Intel^® Core™ CPUs and offer PCIe^® 4.0 connectivity for the latest GPUs. The wide bandwidth and superfast transmission speeds allow you to create feature-rich builds that can handle high loads effortlessly.

USB 3.2 Gen 1 Type-C^®

Numerous USB ports support high-end rigs loaded with peripherals, including front USB Type-C^® connectors with fast USB 3.2 Gen 1 for transmission speeds of up to 5 Gbps.

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.

Personalization

Aura Sync

Outshine the Competition

A well-tuned enthusiast system deserves a matching aesthetic. ASUS Aura offers full RGB lighting control with a variety of functional presets for the built-in RGB LEDs as well as strips and devices connected to the onboard RGB headers — and it can all be synced with an ever-growing portfolio of Aura-capable hardware.

Learn More >

Static

Breathing

Strobing

Rainbow

Color Cycle

Starry Night

Music Effect

Smart

Dark

Adaptive Color

Addressable Gen 2 Headers

Three addressable Gen 2 headers are capable of detecting the number of LEDs on second-gen addressable RGB devices, allowing the software to automatically tailor lighting effects to specific devices. The new headers also offer backward-compatibility with existing Aura RGB gear.

Armoury Crate

Armoury Crate is a new software utility designed to give you centralized control of supported products. From a single intuitive interface, Armoury Crate allows you to easily customize RGB lighting and effects for every compatible device in your arsenal. 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 fortified with a one-piece stainless-steel brace that shields the slot to protect it from damage. The metal cover is tightly secured to the slot with hooks, and the entire assembly is firmly anchored to the PCB with strengthened solder points to provide a secure foundation for heavyweight graphics cards.

Strengthened solder points around the PCIe and DIMM pins.

Metal inserts keep graphics cards properly aligned during installation.

The metal side-panels feature hooks that firmly clasp the slot body.

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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PRIME B660M-A D4-CSM

PRIME B660M-A 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

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.

EZ XMP

Improve DRAM performance with one click.

Intuitive Graphical Fan Control

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

Aura On/Off Mode (Stealth)

Easily enable or disable Aura RGB lighting or every onboard LED, for a subdued aesthetic touch.

.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

M.2 Heatsink

M.2 heatsink wards off throttling that can occur with M.2 storage during sustained transfers. The heatsink is held in place by captive screws.

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 2+ software or via the UEFI BIOS.

Multiple Temperature Sources

Each header can dynamically reference three thermal sensors. Fan Xpert 2+ allows you to map the temperature of supported ASUS graphics cards to optimize cooling for GPU- and CPU-intensive tasks.

Smart Protection

A dedicated integrated circuit protects each fan header from overheating and overcurrent.

4-Pin PWM/DC Fan

Each onboard 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;}

Robust Power Design

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

ProCool Connector

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

Memory

ASUS OptiMem II

Revisions to the motherboard’s trace routing provide the latest Intel processors with unrestricted access to memory bandwidth. ASUS OptiMem II technology carefully maps memory signal pathways across different PCB layers to reduce vias and adds shielding zones that significantly reduce crosstalk.

Benefits of ASUS OptiMem II:

DDR4 5333(OC)

Improvements to trace routing design provide the latest Intel processors with enhanced access to memory bandwidth. ASUS OptiMem II 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-A 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 B660 motherboards are designed specifically for 14th, 13th & 12th Generation Intel® Core™ CPUs and offer PCIe® 4.0 connectivity for the latest GPUs. The wide bandwidth and superfast transmission speeds allow you to create feature-rich builds that can handle high loads effortlessly.

USB 3.2 Gen 1 Type-C®

Numerous USB ports support high-end rigs loaded with peripherals, including front USB Type-C® connectors with fast USB 3.2 Gen 1 for transmission speeds of up to 5 Gbps.

.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.

Personalization

Aura Sync

Outshine the Competition

Addressable Gen 2 Headers

Three addressable Gen 2 headers are capable of detecting the number of LEDs on second-gen addressable RGB devices, allowing the software to automatically tailor lighting effects to specific devices. The new headers also offer backward-compatibility with existing Aura RGB gear.

Armoury Crate

Aura Sync

ASUS Control
Center Express

FLEXIBILITY

COOLING

PERFORMANCE

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

PRIME B660M-A 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 B660 motherboards are designed specifically for 14^th, 13^th & 12^th Generation Intel^® Core™ CPUs and offer PCIe^® 4.0 connectivity for the latest GPUs. The wide bandwidth and superfast transmission speeds allow you to create feature-rich builds that can handle high loads effortlessly.

USB 3.2 Gen 1 Type-C^®

Numerous USB ports support high-end rigs loaded with peripherals, including front USB Type-C^® connectors with fast USB 3.2 Gen 1 for transmission speeds of up to 5 Gbps.

CUSTOMIZATION

1000+
Compatible devices and components

8000+
Validation hours