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Green MicroATX motherboard with silver CPU socket and black slots

ASUS

ASUS PRIME B660M-K D4 Intel LGA 1700 B660 MicroATX motherboard

SKU CH-MQ1M-B55NC

MicroATX board for 12th Gen Intel CPUs with DDR4 memory up to 64 GB, one PCIe 4.0 x16 slot, two M.2 sockets and a single RJ-45 port

  • ProcessorCore / Pentium / Celeron (12th Gen, LGA1700)
  • ChipsetB660
  • Form factorMicro ATX
  • CPU socketLGA 1700
  • Supported memoryDDR4
  • Max supported RAM64 GB
  • Supports 12th Gen Intel Core, Pentium, Celeron CPUs via LGA 1700 socket
  • DDR4 memory up to 64 GB for responsive multitasking
  • PCI Express 4.0 x16 slot delivers high-bandwidth GPU performance
  • Two M.2 slots enable fast storage expansion
  • Micro ATX form factor fits compact builds

ASUS PRIME B660M-K D4 DDR4 MicroATX

This ASUS motherboard uses the Intel B660 chipset with an LGA 1700 socket for 12th generation Core, Pentium and Celeron processors. It fits a MicroATX chassis and runs DDR4 memory up to 64GB. One PCI Express 4.0 x16 slot and one legacy PCI slot handle expansion cards, while two M.2 sockets accept storage drives. The board ships alone without an I/O shield or cables.

Builders keeping DDR4 memory and compact cases

Suits builders upgrading to a 12th generation Intel CPU while reusing existing DDR4 modules in a smaller MicroATX case. It provides two M.2 slots and a single modern x16 graphics slot. Buyers who need integrated Wi-Fi, more than two M.2 drives, additional rear USB ports or a bundled I/O shield should look at other boards.

LGA 1700 socket for 12th generation Intel CPUs

The socket and chipset combination decides compatibility — only 12th generation Core, Pentium and Celeron processors listed on the manufacturer's CPU support list will work, some requiring a BIOS update. No other processor generation fits this socket. Check that list before purchase to confirm your exact processor model is supported.

How it compares

Measured against everything we stock in Motherboards for Intel CPUs, at today’s prices. Recalculated every night.

Price $93.99
Typical for this category: the median of 2,965 items is $97.99.

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Specifications

Product
Brand nameASUS
Model namePRIME B660M-K D4
Processor
ProcessorCore / Pentium / Celeron (12th Gen, LGA1700)
CPU socketLGA 1700
ChipsetB660
Memory
Supported memoryDDR4
Max supported RAM64 GB
Storage
M.2 slots2 x M.2
Ports & slots
PCIe 4.0 x16 slots1 x PCI Express 4.0 x16
PCIe x16 slots1
PCI slots1 x PCI Slot
Ethernet port1 x RJ45
USB 3.1 ports1 x USB 3.1
Size & build
Form factorMicro ATX

Questions about this item

How much DDR4 memory can the board handle before the 64GB limit is reached?

The four DDR4 slots support up to 64GB total, so filling every slot with 16GB modules hits the ceiling.

What happens to fan noise and VRM temperature when the system runs at full load all day?

The VRM heatsink and PWM fan headers keep thermals in check, and fan curves can be tuned in BIOS for quieter long-term operation.

Which parts must I already have because the box contains only the bare motherboard?

You need a LGA 1700 CPU, DDR4 memory, an ATX power supply, a case with Micro-ATX standoffs, and your own I/O shield.

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