PRIME B660M-A D4
- Intel® LGA 1700 socket: Ready for 12th 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 optimisations 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 Prime series motherboards are expertly engineered to unleash the full potential of 12th 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.
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
・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)
Intel® 12th Gen 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
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.
All-Around Energy Efficiency
The Energy Processing Unit (EPU) automatically optimises power consumption and maximises 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.
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.
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.
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.
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.
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.
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 optimise cooling for GPU- and CPU-intensive tasks.
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.
Prime B660 series are built to handle the additional cores and increased bandwidth of 12th 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 12th Generation Intel processors. PRIME B660M-A D4 is geared to cater to the demands of these high-core-count CPUs.
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.
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
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.
Two M.2 slots (up to 64 Gbps)
Prime B660M-A 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.
* Actual transmission speeds will be lower than the theoretical maximum speed.
PCIe® 4.0 Slot
Prime B660 motherboards are designed specifically for 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.
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 customise your system to create a uniquely personal look.
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 >
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 is a new software utility designed to give you centralised control of supported products. From a single intuitive interface, Armoury Crate allows you to easily customise 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.
Driver & Manual Download
Two-Way AI Noise Cancellation
Fan Xpert 2+
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
4 Hz (0.25s)
No VGA Detected
1/2 Hz (2s)
No Boot Device Detected
Very slow blinking
1/8 Hz (8s)
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.