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 B660M-K D4 provides users and PC DIY builders a range of performance tuning options via intuitive software and firmware features.
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.
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.
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.
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.
PERFORMANCE
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.
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
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 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 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.
Realtek 1 Gb Ethernet
Realtek 1 Gb Ethernet reduces CPU overhead and offers exceptionally high TCP and UDP throughput for faster, smoother data transfer.
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.
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.
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.
Main Features
Intel LGA 1700 socket: Ready for 12th 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
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 12th 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
PRIME
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 B660M-K D4 provides users and PC DIY builders a range of performance tuning options via intuitive software and firmware features
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.
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.
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.
* Actual transmission speeds will be lower than the theoretical maximum speed.
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.
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.
CPU
CPU Socket     Socket 1700
CPU Brand     Intel
Installed Processors (Max)     0 (1)
Supported Processor Manufacturer     Intel
Supported Processors     12th Gen Intel Core, Pentium Gold and Celeron Processors
64-bit Support     Yes
Socket     LGA1700
Rear Panel I/O Ports
USB Ports     4 x USB 3.0
2 x USB 2.0
HDMI Port     1 x HDMI 2.1
VGA Port     1 x D-Sub
Keyboard/Mouse Combo Port     1 x PS/2
RJ-45 Ports     1 x RJ-45
Audio Line In Ports     1 x 3.5mm Jack
Audio Line Out Ports     1 x 3.5mm Jack
Microphone In Port     1 x 3.5mm Jack
Internal I/O Connectors
SATA Connectors     4 x SATA III
USB Connectors     1 x USB 3.0 header (supports 2 ports)
2 x USB 2.0 headers (supports 4 ports)
Speaker     1 x Speaker header
Front Panel Connectors     1 x Front Panel
1 x Front Audio
Cooling Fan Support     1 x CPU fan header
1 x Chassis fan header
S/PDIF Connectors     1 x S/PDIF Out header
Serial Connectors     1 x COM header
TPM Header     1 x SPI TPM header (14-pin)
Power Connector Port     1 x 24-pin ATX
1 x 8-pin EPS
Other Connectors     2 x M.2 slots, Key M, Type 2242/2260/2280 (PCIe Gen4)
1 x 4-pin RGB LED header
Memory
Memory Bus Speed     Up to 5333 MHz
Memory Type     DDR4
Maximum RAM     64 GB
Memory Slot     2 x DIMM
Motherboard
Chipset Manufacturer     Intel
Northbridge     B660
RAID Supported     Yes
RAID Format     RAID 0, 1, 5, 10
SATA Supported     Yes
Expansion
Number of PCI Express Slots     1 x PCI Express 4.0 x16 slot
2 x PCI Express 3.0 x1 slots
Graphics Device
Integrated Graphics Supported     Yes
Sound
Integrated Sound     Realtek
Warranty
Warranty     3 Years
Network
Integrated Network     Realtek
Network Speeds Supported     Up to 1 Gbps
Wireless LAN     No
Bluetooth     No
System Requirements
Operating Systems Supported     Microsoft Windows 11 / 10 64-bit
System
BIOS     128 Mb Flash ROM, UEFI AMI BIOS
Jumpers     1 x Clear CMOS
Software Included (may be trial or restricted)     Yes
Drivers     Yes
Physical
Form Factor     MicroATX Motherboard
In The Box     ASUS Prime B660M-K D4 Motherboard
2 x SATA Cables
1 x I/O Shield
2 x M.2 Anchors
Support DVD
User Manual
Width     244 mm
Length     211 mm
Key Features
Firewire     No
Wireless Network     No
Memory Channel     Dual
On-board Audio Type     7.1
Number of SATA Ports     4 port(s)
Number of USB Ports     6 port(s)
SATA III Support     Yes
USB 3.0 Support     Yes
Multi GPU Support     No
VGA Connection     Yes
DVI Connection     No
HDMI Connection     Yes
DisplayPort Connection     No
Motherboard Form Factor     mATX
Motherboard Power Connectors     8-Pin
Motherboard Chipset     Intel B660
Thunderbolt     No
Motherboard Model     ASUS Prime B660M-K D4
USB 3.1 Support     No
Internal USB3.0 Header     Yes
M.2 Support     Yes
On-board RGB Control     ASUS Aura Sync
Memory Speed     5333 MHz
RGB Header Type     4-Pin RGB
Addressable RGB     No
Internal USB Type-C Header     No
Power Requirement (auto)     60 W
Max Memory Speed Supported (Non-overclocked)     3200 MHz
Max Memory Speed Supported (overclocked)     5333 MHz
CPU Power Pins (female)     8
Total M.2 Slots     2
Maximum NVMe M.2 ports     2
SATA ports     4
No. of front USB2.0 ports supported     4
No. of front USB3.0 ports supported     2