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. ASUS PRIME B660M-A D4 offers a sleek, futuristic-looking build with a black and white finish, space-shuttle-inspired design elements, metallic nameplate and PCB cover.
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.
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.
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.
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.
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.
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 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.
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
Storage 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.
Connectivity 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.
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.
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.
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 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.
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.
Specification:
| Internal I/O |
|---|
| Number of M.2 (M) slots |
3 |
| Thunderbolt headers |
1 |
| Front panel connector |
Yes |
| Supported storage drive interfaces |
M.2, PCI Express 4.0, SATA III |
| USB 2.0 connectors |
2 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors |
2 |
| TPM connector |
Yes |
| S/PDIF out connector |
Yes |
| Number of SATA III connectors |
4 |
| Number of COM connectors |
1 |
| Number of chassis fan connectors |
3 |
| Front panel audio connector |
Yes |
| EPS power connector (8-pin) |
Yes |
| CPU fan connector |
Yes |
| Chassis intrusion connector |
Yes |
| ATX Power connector (24-pin) |
Yes |
| RGB LED pin header |
Yes |
| Technical details |
|---|
| Motherboard chipset family |
Intel |
| Motherboard chipset |
Intel B660 |
| Supported processor sockets |
LGA 1700 |
| HDMI version |
2.1 |
| Motherboard form factor |
ATX |
| Component for |
PC |
| Audio |
|---|
| Audio output channels |
7.1 channels |
| Performance |
|---|
| Number of HDDs supported |
4 |
| Supported storage drive types |
HDD & SSD |
| Motherboard chipset family |
Intel |
| Motherboard chipset |
Intel B660 |
| RAID levels |
0, 1, 5, 10 |
| Windows operating systems supported |
Windows 10 x64, Windows 11 x64 |
| Supported processor sockets |
LGA 1700 |
| Audio output channels |
7.1 channels |
| Motherboard form factor |
ATX |
| Component for |
PC |
| Processor |
|---|
| Processor manufacturer |
Intel |
| Compatible processor series |
Intel® Celeron®, Intel® Core™ i3, Intel® Core™ i5, Intel® Core™ i7, Intel® Core™ i9, Intel® Pentium® Gold |
| Supported processor sockets |
LGA 1700 |
| Processor socket |
LGA 1700 |
| Memory |
|---|
| Number of memory slots |
4 |
| Memory slots type |
DIMM |
| Supported memory types |
DDR4-SDRAM |
| Memory channels |
Dual-channel |
| Non-ECC |
Yes |
| Supported memory clock speeds |
2133,2400,2666,2800,2933,3000,3333,3400,3466,3600,3733,3866,4000,4266,4400,4600,4800,5000,5066 MHz |
| Maximum internal memory |
128 GB |
| Unbuffered memory |
Yes |
| Storage controllers |
|---|
| Number of HDDs supported |
4 |
| Supported storage drive types |
HDD & SSD |
| Supported storage drive interfaces |
M.2, PCI Express 4.0, SATA III |
| RAID levels |
0, 1, 5, 10 |
| Number of storage drives supported |
7 |
| RAID support |
Yes |
| Rear panel I/O ports |
|---|
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity |
1 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity |
2 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity |
1 |
| DisplayPort version |
1.4 |
| USB connector type |
USB Type-A, USB Type-C |
| USB 2.0 ports quantity |
2 |
| VGA (D-Sub) ports quantity |
1 |
| Headphone outputs |
3 |
| HDMI version |
2.1 |
| HDMI ports quantity |
1 |
| Ethernet LAN (RJ-45) ports |
1 |
| DisplayPorts quantity |
1 |
| Network |
|---|
| Ethernet LAN |
Yes |
| Wi-Fi |
No |
| Ethernet interface type |
2.5 Gigabit Ethernet |
| Features |
|---|
| Power source type |
ATX |
| Motherboard chipset family |
Intel |
| Motherboard chipset |
Intel B660 |
| Windows operating systems supported |
Windows 10 x64, Windows 11 x64 |
| Supported processor sockets |
LGA 1700 |
| Audio output channels |
7.1 channels |
| Motherboard form factor |
ATX |
| Component for |
PC |
| Harmonized System (HS) code |
84733020 |
| Expansion slots |
|---|
| Number of M.2 (M) slots |
3 |
| PCI Express x1 (Gen 3.x) slots |
2 |
| PCI Express x16 (Gen 3.x) slots |
1 |
| PCI Express x16 (Gen 4.x) slots |
1 |
| BIOS |
|---|
| BIOS type |
UEFI AMI |
| Clear CMOS jumper |
Yes |
| BIOS memory size |
128 Mbit |
| Power |
|---|
| Power source type |
ATX |
| Software |
|---|
| Windows operating systems supported |
Windows 10 x64, Windows 11 x64 |
| Weight & dimensions |
|---|
| Height |
2.09" (53 mm) |
| Weight |
31.4 oz (891 g) |
| Width |
12" (305 mm) |
| Depth |
9.61" (244 mm) |
| Packaging content |
|---|
| Cables included |
SATA |
| Other features |
|---|
| Height |
2.09" (53 mm) |
| Weight |
31.4 oz (891 g) |
