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Green Micro ATX motherboard with silver heatsinks, black slots and rear I/O shield

ASRock

ASRock B250M Pro4 LGA 1151 Micro ATX Intel motherboard

SKU CH-MYYQ-WF1B4

Micro-ATX board for 6th- and 7th-gen Intel CPUs with four DDR4 slots, dual x16 PCIe, six SATA3 ports and an Ultra M.2 socket

  • ProcessorSupports 7th and 6th Generation Intel Core i7/i5/i3/ Pentium
  • ChipsetIntel B250
  • Form factorMicro ATX
  • CPU socketLGA 1151
  • CPU technologiesTurbo Boost Technology 2.0 * Not Compatible with Intel 8th G
  • Onboard video chipSupports Intel HD Graphics Built-in Visuals: Intel Quick Syn
  • Supports 7th and 6th Gen Intel Core processors on LGA 1151 socket
  • Dual-channel DDR4 memory up to 2400 MHz with 64 GB maximum capacity
  • Two PCI Express 3.0 x16 slots plus one x1 slot for graphics and expansion cards
  • Ultra M.2 socket delivers PCI Express 3.0 x4 speeds up to 32 Gb/s for NVMe SSDs
  • Intel I219-V Gigabit LAN and Realtek ALC892 7.1-channel audio for wired networking and surround sound

Socket LGA 1151 Micro ATX board

The ASRock B250M Pro4 is a Micro ATX motherboard built around the Intel B250 chipset for Socket LGA 1151 processors. It accepts 6th and 7th Generation Intel Core i7, i5, i3, Pentium and Celeron CPUs. The board is not compatible with 8th Generation Intel CPUs. It fits standard Micro ATX chassis and provides a compact platform for office or home builds.

Dual Ultra M.2 and six SATA3 ports

Two Ultra M.2 sockets accept type 2230, 2242, 2260 and 2280 modules; one supports both SATA3 and PCI Express Gen3 x4 modes, the other supports PCI Express only. Six SATA3 6.0Gb/s connectors handle hard drives and SATA SSDs with NCQ, AHCI and hot plug. If a SATA-type M.2 device occupies the first socket, one SATA3 port is disabled. Realtek ALC892 delivers 7.1 channel audio and Intel I219-V provides 1Gbps LAN.

Four DDR4 slots up to 64GB

Four 288-pin DDR4 slots run in dual-channel mode with a maximum capacity of 64GB. 7th Generation CPUs support DDR4 2400, while 6th Generation CPUs support DDR4 2133. Two PCI Express 3.0 x16 slots operate at x16 and x4 electrical, plus one PCI Express 3.0 x1 slot and one legacy PCI slot. Integrated graphics output via D-Sub, DVI-D and HDMI supports triple monitors with HDMI up to 4096x2160 at 24Hz.

How it compares

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

Price $69.99
Cheaper than about 69% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameASRock
Model nameB250M Pro4
Processor
ProcessorSupports 7th and 6th Generation Intel Core i7/i5/i3/ Pentium/Celeron Processors (Socket 1151)
CPU socketLGA 1151
ChipsetIntel B250
CPU technologiesTurbo Boost Technology 2.0
* Not Compatible with Intel 8th Gen CPUs
Memory
Memory slot count4 × 288pin (DDR4)
Supported memoryDDR4 2400*/ 2133 × 7th Gen Intel CPU supports DDR4 up to 2400; 6th Gen Intel CPU supports DDR4 up to 2133.
Memory channelsDual Channel
Storage
SATA ports6 x SATA3 6.0Gb/s Connectors, support NCQ, AHCI and Hot Plug*
* If M2_1 is occupied by a SATA-type M.2 device, SATA3_0 will be disabled.
M.2 slots1 x Ultra M.2 Socket (M2_1), supports type 2230/2242/2260/2280 M.2 SATA3 6.0Gb/s module and M.2 PCI Express module up to Gen3 x4 (32Gb/s)**
1 x Ultra M.2 Socket (M2_2), supports type 2230/2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32Gb/s)**
** If PCIE2 slot or PCI slot is occupied, the PCIe-type M.2 device on M2_1 socket will run at Gen3 x2 (16Gb/s).
** Supports Intel Optane Technology (M2_2 only)
** Supports NVMe SSD as boot disks**
** Supports ASRock U.2 Kit
Audio & video
Audio chipRealtek ALC892
Connectivity
Ethernet controllerIntel I219-V
Maximum network speed1 Gbit/s
Ports & slots
PCIe 3.0 x16 slots2 x PCI Express 3.0 x16 Slots (PCIE1: x16 mode; PCIE3: x4 mode)*
* Supports NVMe SSD as boot disks
PCIe x1 slots1 x PCI Express 3.0 x1 Slot (Flexible PCIe)
PCI slots1 x PCI Slot
PS/2 ports1 x PS/2 Mouse Port
1 x PS/2 Keyboard Port
Video connectors1 x D-Sub Port
1 x DVI-D Port
HDMI ports1 x HDMI
Ethernet port1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
USB 3.1 ports3 x USB 3.1 Gen1 Type-A Ports (Supports ESD Protection (ASRock Full Spike Protection))
1 x USB 3.1 Gen1 Type-C Port (Supports ESD Protection (ASRock Full Spike Protection))
USB 2.0 ports2 x USB 2.0 Ports (Supports ESD Protection (ASRock Full Spike Protection))
Audio jacksHD Audio Jacks: Line in / Front Speaker / Microphone
Power
Power connectors1 × 24-pin ATX Power Connector
1 × 8-pin 12 V Power Connector
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in

Questions about this item

Will the CMOS battery need replacing and how is it accessed?

A standard coin cell is fitted in a holder on the board; it can be swapped by lifting the retaining clip once the system clock begins to lose time

Which expansion slot saturates first when a high-throughput NVMe drive and a discrete GPU are both active?

The Ultra M.2 socket (M2_1) runs at PCIe 3.0 x4 (32Gb/s) while the primary PCIe x16 slot operates at x16, so the M.2 link reaches its ceiling first

How loud are the chipset and VRM areas after hours of full-load operation?

The B250 chipset and VRM sections are passively cooled; they stay silent, though case airflow must handle the heat they dissipate

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