ASROCK B250M PRO4 User manual

Version 1.0
Published October 2016
Copyright©2016 ASRock INC. All rights reserved.
Copyright Notice:
No part of this documentation may be reproduced, transcribed, transmitted, or
translated in any language, in any form or by any means, except duplication of
documentation by the purchaser for backup purpose, without written consent of
ASRock Inc.
Products and corporate names appearing in this documentation may or may not
be registered trademarks or copyrights of their respective companies, and are used
only for identication or explanation and to the owners’ benet, without intent to
infringe.
Disclaimer:
Specications and information contained in this documentation are furnished for
informational use only and subject to change without notice, and should not be
constructed as a commitment by ASRock. ASRock assumes no responsibility for
any errors or omissions that may appear in this documentation.
With respect to the contents of this documentation, ASRock does not provide
warranty of any kind, either expressed or implied, including but not limited to
the implied warranties or conditions of merchantability or tness for a particular
purpose.
In no event shall ASRock, its directors, ocers, employees, or agents be liable for
any indirect, special, incidental, or consequential damages (including damages for
loss of prots, loss of business, loss of data, interruption of business and the like),
even if ASRock has been advised of the possibility of such damages arising from any
defect or error in the documentation or product.
is device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
CALIFORNIA, USA ONLY
e Lithium battery adopted on this motherboard contains Perchlorate, a toxic substance
controlled in Perchlorate Best Management Practices (BMP) regulations passed by the
California Legislature. When you discard the Lithium battery in California, USA, please
follow the related regulations in advance.
“Perchlorate Material-special handling may apply, see www.dtsc.ca.gov/hazardouswaste/
perchlorate”
ASRock Website: http://www.asrock.com

AUSTRALIA ONLY
Our goods come with guarantees that cannot be excluded under the Australian Consumer
Law. You are entitled to a replacement or refund for a major failure and compensation for
any other reasonably foreseeable loss or damage caused by our goods. You are also entitled
to have the goods repaired or replaced if the goods fail to be of acceptable quality and the
failure does not amount to a major failure. If you require assistance please call ASRock Tel
: [phone] ext.123 (Standard International call charges apply)
e terms HDMI™ and HDMI High-Denition Multimedia Interface, and the HDMI
logo are trademarks or registered trademarks of HDMI Licensing LLC in the United
States and other countries.

Contents
Chapter 1 Introduction 1
1.1 Package Contents 1
1.2 Specications 2
1.3 Motherboard Layout 7
1.4 I/O Panel 9
Chapter 2 Installation 11
2.1 Installing the CPU 12
2.2 Installing the CPU Fan and Heatsink 15
2.3 Installing Memory Modules (DIMM) 16
2.4 Expansion Slots (PCI and PCI Express Slots) 18
2.5 Onboard Headers and Connectors 19
2.6 CrossFireXTM and Quad CrossFireXTM Operation Guide 23
2.6.1 Installing Two CrossFireXTM-Ready Graphics Cards 23
2.6.2 Driver Installation and Setup 25
2.7 M.2_SSD (NGFF) Module Installation Guide 26
Chapter 3 Software and Utilities Operation 29
3.1 Installing Drivers 29
3.2 ASRock Live Update & APP Shop 30
3.2.1 UI Overview 30
3.2.2 Apps 31
3.2.3 BIOS & Drivers 34
3.2.4 Setting 35

3.3 Enabling USB Ports for Windows® 7 Installation 36
Chapter 4 UEFI SETUP UTILITY 37
4.1 Introduction 37
4.2 EZ Mode 38
4.3 Advanced Mode 39
4.3.1 UEFI Menu Bar 39
4.3.2 Navigation Keys 40
4.4 Main Screen 41
4.5 OC Tweaker Screen 42
4.6 Advanced Screen 48
4.6.1 CPU Conguration 49
4.6.2 Chipset Conguration 51
4.6.3 Storage Conguration 54
4.6.4 Super IO Conguration 55
4.6.5 ACPI Conguration 56
4.6.6 USB Conguration 58
4.6.7 Trusted Computing 59
4.7 Tools 60
4.8 Hardware Health Event Monitoring Screen 63
4.9 Security Screen 65
4.10 Boot Screen 66
4.11 Exit Screen 69

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B250M Pro4
Chapter 1 Introduction
ank you for purchasing ASRock B250M Pro4 motherboard, a reliable
motherboard produced under ASRock’s consistently stringent quality control.
It delivers excellent performance with robust design conforming to ASRock’s
commitment to quality and endurance.
In this documentation, Chapter 1 and 2 contains the introduction of the
motherboard and step-by-step installation guides. Chapter 3 contains the operation
guide of the soware and utilities. Chapter 4 contains the conguration guide of
the BIOS setup.
1.1 Package Contents
• ASRock B250M Pro4 Motherboard (Micro ATX Form Factor)
• ASRock B250M Pro4 Quick Installation Guide
• ASRock B250M Pro4 Support CD
• 2 x Serial ATA (SATA) Data Cables (Optional)
• 2 x Screws for M.2 Sockets (Optional)
• 1 x I/O Panel Shield
Because the motherboard specications and the BIOS soware might be updated, the
content of this documentation will be subject to change without notice. In case any
modications of this documentation occur, the updated version will be available on
ASRock’s website without further notice. If you require technical support related to
this motherboard, please visit our website for specic information about the model
you are using. You may nd the latest VGA cards and CPU support list on ASRock’s
website as well. ASRock website http://www.asrock.com.

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1.2 Specications
Platform • Micro ATX Form Factor
• Solid Capacitor design
CPU • Supports 7th and 6th Generation Intel® CoreTM i7/i5/i3/
Pentium®/Celeron® Processors (Socket 1151)
• Digi Power design
• 6 Power Phase design
• Supports Intel® Turbo Boost 2.0 Technology
Chipset • Intel® B250
Memory • Dual Channel DDR4 Memory Technology
• 4 x DDR4 DIMM Slots
• Supports DDR4 2400/2133 non-ECC, un-buered memory*
* 7th Gen Intel® CPU supports DDR4 up to 2400; 6th Gen Intel®
CPU supports DDR4 up to 2133.
• Supports ECC UDIMM memory modules (operate in non-
ECC mode)
• Max. capacity of system memory: 64GB
• Supports Intel® Extreme Memory Prole (XMP) 2.0
• 15μ Gold Contact in DIMM Slots
Expansion
Slot
• 2 x PCI Express 3.0 x16 Slots (PCIE1: x16 mode; PCIE3: x4
mode)*
* Supports NVMe SSD as boot disks
• 1 x PCI Express 3.0 x1 Slot (Flexible PCIe)
• 1 x PCI Slot
• Supports AMD Quad CrossFireXTM and CrossFireXTM
Graphics • Intel® HD Graphics Built-in Visuals and the VGA outputs
can be supported only with processors which are GPU
integrated.
• Supports Intel® HD Graphics Built-in Visuals : Intel® Quick
Sync Video with AVC, MVC (S3D) and MPEG-2 Full
HW Encode1, Intel® InTruTM 3D, Intel® Clear Video HD
Technology, Intel® InsiderTM, Intel® HD Graphics
• Gen9 LP, DX11.3, DX12

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B250M Pro4
• HWAEncode/Decode: VP8, HEVC 8b, VP9, HEVC 10b (For
7th Gen Intel® CPU)
• HWA Encode/Decode: VP8 , HEVC 8b; GPU/SWEncode/
Decode: VP9, HEVC 10b (For 6th Gen Intel® CPU)
• Max. shared memory 1024MB
* e size of maximum shared memory may vary from dierent
operating systems.
• ree graphics output options: D-Sub, DVI-D and HDMI
• Supports Triple Monitor
• Supports HDMI with max. resolution up to 4K x 2K
(4096x2160) @ 24Hz / (3840x2160) @ 30Hz
• Supports DVI-D with max. resolution up to 1920x1200 @
60Hz
• Supports D-Sub with max. resolution up to 1920x1200 @
60Hz
• Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and
HBR (High Bit Rate Audio) with HDMI Port (Compliant
HDMI monitor is required)
• Supports HDCP with DVI-D and HDMI Ports
• Supports Full HD 1080p Blu-ray (BD) playback with DVI-D
and HDMI Ports
Audio • 7.1 CH HD Audio with Content Protection (Realtek ALC892
Audio Codec)
* To congure 7.1 CH HD Audio, it is required to use an HD
front panel audio module and enable the multi-channel audio
feature through the audio driver.
• Premium Blu-ray Audio support
• Supports Surge Protection (ASRock Full Spike Protection)
• ELNA Audio Caps
LAN • Gigabit LAN 10/100/1000 Mb/s
• Giga PHY Intel® I219V
• Supports Wake-On-LAN
• Supports Lightning/ESD Protection (ASRock Full Spike
Protection)
• Supports Energy Ecient Ethernet 802.3az
• Supports PXE

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Rear Panel
I/O
• 1 x PS/2 Mouse Port
• 1 x PS/2 Keyboard Port
• 1 x D-Sub Port
• 1 x DVI-D Port
• 1 x HDMI Port
• 2 x USB 2.0 Ports (Supports ESD Protection (ASRock Full
Spike Protection))
• 3 x USB 3.0 Type-A Ports (Supports ESD Protection (ASRock
Full Spike Protection))
• 1 x USB 3.0 Type-C Port (Supports ESD Protection (ASRock
Full Spike Protection))
• 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED
LED)
• HD Audio Jacks: Line in / Front Speaker / Microphone
Storage • 6 x SATA3 6.0 Gb/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.
• 1 x Ultra M.2 Socket (M2_1), supports type
2230/2242/2260/2280 M.2 SATA3 6.0 Gb/s module and M.2
PCI Express module up to Gen3 x4 (32 Gb/s)**
• 1 x Ultra M.2 Socket (M2_2), supports type
2230/2242/2260/2280 M.2 PCI Express module up to Gen3
x4 (32 Gb/s)**
** If PCIE2 slot or PCI slot is occupied, the PCIe-type M.2
device on M2_1 socket will run at Gen3 x2 (16 Gb/s).
** Supports Intel® OptaneTM Technology
** Supports NVMe SSD as boot disks
** Supports ASRock U.2 Kit
Connector • 1 x Print Port Header
• 1 x COM Port Header
• 1 x TPM Header
• 1 x Chassis Intrusion and Speaker Header
• 2 x CPU Fan Connectors (1 x 4-pin, 1 x 3-pin)
* e CPU Fan Connector supports the CPU fan of maximum
1A (12W) fan power.
• 2 x Chassis Fan Connectors (4-pin) (Smart Fan Speed Con-
trol)

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B250M Pro4
* For detailed product information, please visit our website: http://www.asrock.com
* CHA_FAN1 and CHA_FAN2 can auto detect if 3-pin or 4-pin
fan is in use.
• 1 x 24 pin ATX Power Connector
• 1 x 8 pin 12V Power Connector
• 1 x Front Panel Audio Connector
• 2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports
ESD Protection (ASRock Full Spike Protection))
• 1 x USB 3.0 Header (Supports 2 USB 3.0 ports) (Supports
ESD Protection (ASRock Full Spike Protection))
BIOS
Feature
• AMI UEFI Legal BIOS with multilingual GUI support
• ACPI 6.0 Compliant wake up events
• SMBIOS 2.7 Support
• CPU, GT_CPU, DRAM, PCH 1.0V, VCCIO, VCCSA, VCCST
Voltage Multi-adjustment
Hardware
Monitor
• CPU/Chassis temperature sensing
• CPU/Chassis Fan Tachometer
• CPU/Chassis Quiet Fan (Auto adjust chassis fan speed by
CPU temperature)
• CPU/Chassis Fan multi-speed control
• CASE OPEN detection
• Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore, DRAM,
PCH 1.0V
OS • Microso® Windows® 10 64-bit (For 7th Gen Intel® CPU)
• Microso® Windows® 10 64-bit / 8.1 64-bit / 7 32-bit / 7 64-
bit (For 6th Gen Intel® CPU)
* To install Windows® 7 OS, a modied installation disk with
xHCI drivers packed into the ISO le is required. Please refer to
page 36 for more detailed instructions.
* For the updated Windows® 10 driver, please visit ASRock’s
website for details: http://www.asrock.com
Certica-
tions
• FCC, CE, WHQL, RCM, BSMI
• ErP/EuP Ready (ErP/EuP ready power supply is required)

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Please realize that there is a certain risk involved with overclocking, including
adjusting the setting in the BIOS, applying Untied Overclocking Technology, or using
third-party overclocking tools. Overclocking may aect your system’s stability, or
even cause damage to the components and devices of your system. It should be done
at your own risk and expense. We are not responsible for possible damage caused by
overclocking.

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B250M Pro4
1.3 Motherboard Layout
Intel
B250
ATXPWR1
HDLED RESET
PLED PWRBTN
PANEL1
1
COM1
1
B250M Pro4
RoHS
CPU_FAN1
PCIE1
TPMS1
1
1
USB3_4
SPK_CI1
1
PCIE2
Front USB 3.0
CMOS
Battery
DDR4_A 2 (64 bit, 288-pin mod ule)
DDR4_A 1 (64 bit, 288- pin mod ule) DDR4_B 2 (64 bit, 288-pin mod ule)
DDR4_B 1 (64 bit, 288- pin mod ule)
ATX1 2V 1
SATA3_2
SATA3_3
USB3_5_6
SATA3_4
SATA3_5
CLRMOS1
1
1
HD_AUDIO1
M2_1
CT3CT4 C T2
Top:
RJ-45
USB 2.0
T: USB1
B: USB2
HDMI1
CHA_FAN1
Top:
LIN E IN
Center:
FRONT
Bottom:
MIC I N
USB 3 .0
T:USB3_TA_1
B: USB3_TC_1
PCIE3
PCI Express 3.0
SATA3_1
CHA_FAN2
Ultra M .2
PCIe Ge n3 x4
PS2
Keyboard
PS2
Mous e
DVI1
VGA1
USB 3. 0
T: USB3
B: USB 4
CPU_FAN2
Ct1
PCI1
1
LPT1
1
USB5_6
1
BIOS
ROM
M2_2
CT3CT4 CT2 C t1
SATA3_0

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No. Description
1 ATX 12V Power Connector (ATX12V1)
2 Chassis Fan Connector (CHA_FAN1)
3 CPU Fan Connector (CPU_FAN1)
4 CPU Fan Connector (CPU_FAN2)
5 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)
6 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)
7 ATX Power Connector (ATXPWR1)
8 USB 3.0 Header (USB3_5_6)
9 SATA3 Connector (SATA3_0)
10 SATA3 Connector (SATA3_1)
11 Chassis Fan Connector (CHA_FAN2)
12 SATA3 Connector (SATA3_2)
13 SATA3 Connector (SATA3_3)
14 SATA3 Connector (SATA3_5)
15 SATA3 Connector (SATA3_4)
16 Clear CMOS Jumper (CLRMOS1)
17 Chassis Intrusion and Speaker Header (SPK_CI1)
18 System Panel Header (PANEL1)
19 USB 2.0 Header (USB5_6)
20 USB 2.0 Header (USB3_4)
21 TPM Header (TPMS1)
22 Print Port Header (LPT1)
23 COM Port Header (COM1)
24 Front Panel Audio Header (HD_AUDIO1)

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B250M Pro4
1.4 I/O Panel
No. Description No. Description
1 PS/2 Mouse Port 8 USB 3.0 Ports (USB3_3_4)
2 D-Sub Port 9 USB 3.0 Type-A Port (USB3_TA_1)
3 LAN RJ-45 Port* 10 USB 3.0 Type-C Port (USB3_TC_1)
4 Line In (Light Blue)** 11 HDMI Port
5 Front Speaker (Lime)** 12 DVI-D Port
6 Microphone (Pink)** 13 PS/2 Keyboard Port
7 USB 2.0 Ports (USB12)
* ere are two LEDs on the LAN port. Please refer to the table below for the LAN port LED indications.
Activity / Link LED Speed LED
Status Description Status Description
O No Link O 10Mbps connection
Blinking Data Activity Orange 100Mbps connection
On Link Green 1Gbps connection
ACT/LINK LED
SPEED LED
LAN Port
13 6711
12
5
4
1 3
8
2
10
9

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** To congure 7.1 CH HD Audio, it is required to use an HD front panel audio module and enable the multi-
channel audio feature through the audio driver.
Please set Speaker Conguration to “7.1 Speaker”in the Realtek HD Audio Manager.
Function of the Audio Ports in 7.1-channel Conguration:
Port Function
Light Blue (Rear panel) Rear Speaker Out
Lime (Rear panel) Front Speaker Out
Pink (Rear panel) Central /Subwoofer Speaker Out
Lime (Front panel) Side Speaker Out
How to Remove the I/O Cover?
Certain graphics cards with extra thickness of the back plate may collide with the pre-installed I/O cover.
Before installing such a wider graphics card, please loosen the screws to remove the I/O cover, as the picture
shown below.
1
2

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B250M Pro4
is is a Micro ATX form factor motherboard. Before you install the motherboard,
study the conguration of your chassis to ensure that the motherboard ts into it.
Pre-installation Precautions
Take note of the following precautions before you install motherboard components
or change any motherboard settings.
• Make sure to unplug the power cord before installing or removing the motherboard
components. Failure to do so may cause physical injuries and damages to motherboard
components.
• In order to avoid damage from static electricity to the motherboard’s components,
NEVER place your motherboard directly on a carpet. Also remember to use a grounded
wrist strap or touch a safety grounded object before you handle the components.
• Hold components by the edges and do not touch the ICs.
• Whenever you uninstall any components, place them on a grounded anti-static pad or
in the bag that comes with the components.
• When placing screws to secure the motherboard to the chassis, please do not over-
tighten the screws! Doing so may damage the motherboard.
Chapter 2 Installation

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2.1 Installing the CPU
1. Before you insert the 1151-Pin CPU into the socket, please check if the PnP cap
is on the socket, if the CPU surface is unclean, or if there are any bent pins in the
socket. Do not force to insert the CPU into the socket if above situation is found.
Otherwise, the CPU will be seriously damaged.
2. Unplug all power cables before installing the CPU.
1
2
A
B

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B250M Pro4
4
5
3

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Please save and replace the cover if the processor is removed. e cover must be
placed if you wish to return the motherboard for aer service.

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B250M Pro4
2.2 Installing the CPU Fan and Heatsink
1 2
CPU_FAN