ASUS PRIME B660M-K D4 Micro-ATX Motherboard with Intel B660, LGA 1700, 2 DDR4 Slots, VGA, HDMI, PCIe4 and 2x M.2 Ports

ASUS PRIME B660M‑K D4 is a Micro‑ATX motherboard that brings the power of Intel’s B660 chipset and the new LGA 1700 socket to compact builds. Designed for both mainstream productivity and entry‑level gaming, it delivers a solid feature set while keeping the board size manageable.

Form Factor & Physical Dimensions

The board follows the standard Micro‑ATX layout with dimensions of 244 mm × 211 mm. Its compact footprint allows installation in small chassis such as mini‑ITX cases, yet it still offers a generous number of expansion slots and ports.

CPU Compatibility & Chipset Features

The B660 chipset supports Intel’s 12th and 13th generation Alder Lake processors. It provides:

• PCIe 4.0 lanes for high‑speed storage and graphics expansion.
• Integrated support for DDR4 memory, enabling cost‑effective upgrades.
• Robust power delivery that can handle mid‑range CPUs without the need for an expensive VRM stack.

Memory Support

The motherboard features two DDR4 DIMM slots, supporting a maximum of 64 GB. Memory speeds are supported up to 3200 MHz, allowing users to balance performance and budget. Dual‑channel architecture ensures efficient memory bandwidth for multitasking and gaming workloads.

Storage Options

Two M.2 slots provide ultra‑fast NVMe SSD connectivity, with one slot supporting PCIe 4.0 and the other PCIe 3.0. Additionally, the board offers four SATA III ports, each delivering up to 6 Gb/s for traditional hard drives or secondary SSDs.

Expansion Slots

The board includes:

• One PCIe 3.0 x16 slot (full‑length) for a dedicated graphics card.
• Two PCIe 3.0 x1 slots for additional expansion cards such as sound or network adapters.

Video & Audio Output

For integrated graphics, the board offers:

• VGA (D‑Sub) port – useful for legacy monitors.
• HDMI 1.4b port – supports up to 1080p resolution at high refresh rates.

The onboard audio subsystem delivers 7.1‑channel HD Audio, providing immersive sound for gaming and media consumption without the need for a separate sound card.

Networking & Connectivity

A single Realtek Gigabit Ethernet (RJ‑45) port ensures reliable wired networking. The board does not include built‑in Wi‑Fi, but users can add a USB or PCIe wireless adapter if needed.

USB and Front Panel Support

• USB 3.2 Gen 1 (Type‑A) ports – two rear connectors for high‑speed peripherals.
• USB 2.0 ports – two additional rear connectors for legacy devices.
• Front panel header supports audio jack detection, multi‑stream audio, and front‑panel headphone reassigning, enhancing user experience with modern case designs.

Audio Jack Features

The board’s audio system includes:

• Three headphone outputs for multiple users or multi‑room setups.
• Support for jack detection and reassigning, allowing the front panel to switch between line‑in, microphone, and headphone modes automatically.

Operating System Compatibility

The motherboard is fully compatible with Windows 10 (x64) and Windows 11 (x64). The BIOS includes UEFI support for secure boot and fast startup, ensuring smooth installation of modern operating systems.

Power Delivery & Overclocking Potential

While the board is aimed at mainstream users, its solid power delivery design can handle moderate overclocking on supported CPUs. The VRM layout includes multiple MOSFETs and a robust heat sink to maintain stable voltage under load.

Design & Build Quality

The ASUS PRIME B660M‑K D4 features a clean, minimalist aesthetic with a matte black PCB. It incorporates reinforced PCIe slots and durable connectors, ensuring longevity even in high‑traffic environments.

Summary

ASUS PRIME B660M‑K D4 delivers a balanced mix of performance, expandability, and affordability for users building compact systems around Intel’s latest CPUs. With dual DDR4 slots, PCIe 4.0 M.2 support, integrated audio, and a robust set of connectivity options, it stands out as an excellent choice for both everyday productivity and entry‑level gaming.