ASROCK B850M PRO-A User Manual
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ASROCK B850M PRO-A User Manual

ASROCK B850M PRO-A User Manual

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  • Page 2: Contact Information

    Contact Information If you need to contact ASRock or want to know more about ASRock, you’re welcome to visit ASRock’s website at http://www.asrock.com; or you may contact your dealer for further information. For technical questions, please submit a support request form at https://event.asrock.com/tsd.asp ASRock Incorporation e-mail: info@asrock.com.tw...

  • Page 3: Table Of Contents

    Chapter 1 Introduction Package Contents Specifications Motherboard Layout I/O Panel Block Diagram 802.11axe Wi-Fi 6E Module and ASRock WiFi 2.4/5/6 GHz Antennas (B850M Pro-A WiFi) Chapter 2 Installation Installing the CPU Installing the CPU Fan and Heatsink Installing Memory Modules (DIMM)
  • Page 4 2.14 Smart Switches 2.15 Post Status Checker 2.16 M.2 WiFi/BT PCIe WiFi Module Installation Guide (B850M Pro-A) 2.17 M.2 SSD Installation Guide (M2_1) 2.18 M.2 SSD Installation Guide (M2_2 and M2_3)

  • Page 5: Chapter 1 Introduction

    ASRock’s website without further notice. If you require technical support related to this motherboard, please visit our website for specific information about the model you are using. You may find the latest VGA cards and CPU support list on ASRock’s website as well. ASRock website http://www.asrock.com.

  • Page 6: Specifications

    • Supports DDR5 ECC/non-ECC, un-buffered memory up to 8000+(OC)* • Max. capacity of system memory: 256GB • Supports Extreme Memory Profile (XMP) and EXTended Profiles for Overclocking (EXPO) memory modules * Please refer to Memory Support List on ASRock's website for more information. (http://www.asrock.com/) CPU: Expansion Slot • 1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode*...
  • Page 7 B850M Pro-A WiFi B850M Pro-A Graphics • Integrated AMD RDNA graphics (Actual support may vary by CPU) • 1 x HDMI 2.1 TMDS/FRL 8G Compatible, supports HDR, HDCP 2.3 and max. resolution up to 4K 120Hz • 1 x DisplayPort 1.4 with DSC (compressed), supports HDCP 2.3 and max.
  • Page 8 • 8 x USB 2.0 (4 Rear, 4 Front) * All USB ports support ESD Protection Rear Panel • 2 x Antenna Ports (B850M Pro-A WiFi) • 2 x Antenna Mounting Points (B850M Pro-A) • 1 x HDMI Port • 1 x DisplayPort 1.4 • 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s)
  • Page 9 B850M Pro-A WiFi B850M Pro-A RAID • Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices • Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices* * Requires additional M.2 NVMe expansion cards to support...
  • Page 10 * For detailed product information, please visit our website: http://www.asrock.com 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 affect your system’s stability, or even cause damage to the components and devices of your system.

  • Page 11: Motherboard Layout

    B850M Pro-A WiFi B850M Pro-A 1.3 Motherboard Layout...
  • Page 12 No. Description ATX 12V Power Connector (ATX12V1) ATX 12V Power Connector (ATX12V2) CPU Fan Connector (CPU_FAN1) 2 x 288-pin DDR5 DIMM Slots (DDR5_A1, DDR5_B1) 2 x 288-pin DDR5 DIMM Slots (DDR5_A2, DDR5_B2) Addressable LED Header (ADDR_LED3) RGB LED Header (RGB_LED1) Post Status Checker (PSC) ATX Power Connector (ATXPWR1) SATA3 Connector (SATA3_1)

  • Page 13: I/O Panel

    B850M Pro-A WiFi B850M Pro-A 1.4 I/O Panel B850M Pro-A WiFi: No. Description No. Description Antenna Ports USB 2.0 Ports (USB_12) 2.5G LAN RJ-45 Port* USB 3.2 Gen2 Type-A Port (USB32_1) Line In (Light Blue)** USB 3.2 Gen2 Type-C Port (USB32_TC1) Front Speaker (Lime)** DisplayPort 1.4...
  • Page 14 No. Description No. Description 2.5G LAN RJ-45 Port* USB 2.0 Ports (USB_12) Line In (Light Blue)** USB 3.2 Gen2 Type-A Port (USB32_1) Front Speaker (Lime)** USB 3.2 Gen2 Type-C Port (USB32_TC1) Microphone (Pink)** DisplayPort 1.4 USB 3.2 Gen1 Type-A Ports (USB32_23) 11 HDMI Port USB 2.0 Ports (USB_34) BIOS Flashback Button...

  • Page 15: Block Diagram

    B850M Pro-A WiFi B850M Pro-A 1.5 Block Diagram...

  • Page 16: 802.11Axe Wi-Fi 6E Module And Asrock Wifi 2.4/5/6 Ghz Antennas (B850M Pro-A Wifi)

    1.6 802.11axe Wi-Fi 6E Module and ASRock WiFi 2.4/5/6 GHz Antennas (B850M Pro-A WiFi) 802.11axe Wi-Fi 6E + BT Module This motherboard comes with an exclusive 802.11 a/b/g/n/ac/ax/axe Wi-Fi 6E + BT v5.2 module that offers support for 802.11 a/b/g/n/ac/ax/axe Wi-Fi 6E connectivity standards and Bluetooth v5.2.
  • Page 17 B850M Pro-A WiFi B850M Pro-A WiFi Antennas Installation Guide Step 1 Prepare the WiFi 2.4/5/6 GHz Antennas that come with the package. Step 2 Connect the two WiFi 2.4/5/6 GHz Antennas to the antenna connectors. Turn the antenna clockwise until it is securely connected.

  • Page 18: Chapter 2 Installation

    Chapter 2 Installation This is a Micro ATX form factor motherboard. Before you install the motherboard, study the configuration of your chassis to ensure that the motherboard fits into it. Pre-installation Precautions Take note of the following precautions before you install motherboard components or change any motherboard settings.

  • Page 19: Installing The Cpu

    B850M Pro-A WiFi B850M Pro-A 2.1 Installing the CPU 1. Before you insert the 1718-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.
  • Page 20 Carefully place the CPU in as flat as possible. Do not drop it.
  • Page 21 B850M Pro-A WiFi B850M Pro-A Make sure the CPU is aligned with the socket before locking it into place. Make sure the black cover plate is always in place until it pops off when closing the socket lever. Please save the cover if the processor is removed. The cover must be placed if you wish...

  • Page 22: Installing The Cpu Fan And Heatsink

    2.2 Installing the CPU Fan and Heatsink After you install the CPU into this motherboard, it is necessary to install a larger heatsink and cooling fan to dissipate heat. You also need to spray thermal grease between the CPU and the heatsink to improve heat dissipation. Make sure that the CPU and the heatsink are securely fastened and in good contact with each other.
  • Page 23 B850M Pro-A WiFi B850M Pro-A...
  • Page 24 Installing the CPU Cooler (Type 2)
  • Page 25 B850M Pro-A WiFi B850M Pro-A...
  • Page 26 +12V *The illustrations shown here are for reference purposes only and may not exactly match the model you purchase.
  • Page 27 B850M Pro-A WiFi B850M Pro-A Installing the CPU Cooler (Type 3)
  • Page 29 B850M Pro-A WiFi B850M Pro-A...
  • Page 30 +12V Please note that only one cable should be used at a time in this step. If you select RGB_LED1, please install ASRock utility "ASRock Polychrome SYNC". If you select USB connector, please install AMD utility "SR3 Settings Software". *The illustrations shown here are for reference purposes only and may not exactly match...

  • Page 31: Installing Memory Modules (Dimm)

    B850M Pro-A WiFi B850M Pro-A 2.3 Installing Memory Modules (DIMM) This motherboard provides four 288-pin DDR5 (Double Data Rate 5) DIMM slots, and supports Dual Channel Memory Technology. 1. For dual channel configuration, you always need to install identical (the same brand, speed, size and chip-type) DDR5 DIMM pairs.

  • Page 33: Connecting The Front Panel Header

    B850M Pro-A WiFi B850M Pro-A 2.4 Connecting the Front Panel Header Front Panel Wires System Panel Header Power SW (-) RESET SW (+) Power SW (+) RESET SW (-) Power LED (-) HDD LED (-) Power LED (+) HDD LED (+)

  • Page 34: Installing The I/O Panel Shield

    2.5 Installing the I/O Panel Shield...

  • Page 35: Installing The Motherboard

    B850M Pro-A WiFi B850M Pro-A 2.6 Installing the Motherboard...

  • Page 36: Installing Sata Drives

    2.7 Installing SATA Drives Optical Drive SATA Drive SATA Data Cable...
  • Page 37 B850M Pro-A WiFi B850M Pro-A SATA Power Connector SATA Data Connector...

  • Page 38: Installing A Graphics Card

    2.8 Installing a Graphics Card CLICK!
  • Page 39 B850M Pro-A WiFi B850M Pro-A Expansion Slots (PCIe Slots) There are 2 PCI Express slots on the motherboard. Before installing an expansion card, please make sure that the power supply is switched off or the power cord is unplugged. Please read the documentation of the expansion card and make necessary hardware settings for the card before you start the installation.

  • Page 40: Connecting Peripheral Devices

    2.9 Connecting Peripheral Devices...

  • Page 41: Connecting The Power Connectors

    B850M Pro-A WiFi B850M Pro-A 2.10 Connecting the Power Connectors...

  • Page 42: Power On

    2.11 Power On...

  • Page 43: Jumpers Setup

    B850M Pro-A WiFi B850M Pro-A 2.12 Jumpers Setup The illustration shows how jumpers are setup. When the jumper cap is placed on the pins, the jumper is “Short”. If no jumper cap is placed on the pins, the jumper is “Open”.

  • Page 44: Onboard Headers And Connectors

    2.13 Onboard Headers and Connectors Onboard headers and connectors are NOT jumpers. Do NOT place jumper caps over these headers and connectors. Placing jumper caps over the headers and connectors will cause permanent damage to the motherboard. System Panel Header (9-pin PANEL1) (see p.7, No.
  • Page 45 B850M Pro-A WiFi B850M Pro-A Power LED and Speaker Header (7-pin SPK_PLED1) (see p.7, No. 17) Please connect the chassis power LED and the chassis speaker to this header. SPK_PLED1 SPEAKER DUMMY DUMMY PLED+ PLED+ PLED- Serial ATA3 Connectors Right Angle: (SATA3_4) (see p.7, No.
  • Page 46 USB 2.0 Headers (9-pin USB_5_6) (see p.7, No. 21) (9-pin USB_7_8) (see p.7, No. 22) There are two headers on this motherboard. Each USB 2.0 header can support two ports. USB_7_8 USB_PWR DUMMY USB_PWR USB_5_6 USB_PWR DUMMY USB_PWR USB 3.2 Gen1 Headers (19-pin USB32_4_5) (see p.7, No.
  • Page 47 B850M Pro-A WiFi B850M Pro-A Front Panel Type C USB 3.2 Gen1 Header (20-pin USB32_TC2) (see p.7, No. 12) There is one Front Panel Type C USB 3.2 Gen1 Header on this motherboard. This header is used for connecting a USB 3.2 Gen1 module for additional USB 3.2 Gen1 ports.
  • Page 48 Chassis Fan Connectors (4-pin CHA_FAN1) (see p.7, No. 24) (4-pin CHA_FAN2) (see p.7, No. 23) (4-pin CHA_FAN3) (see p.7, No. 20) This header allows you to connect Case or Radiator fan. If you plan to connect a 3-pin fan, please connect it to Pin 1-3. CHA_FAN1 CHA_FAN3 FAN_VOLTAGE...
  • Page 49 B850M Pro-A WiFi B850M Pro-A CPU Fan Connector (4-pin CPU_FAN1) (see p.7, No. 3) This header allows you to connect CPU fan. If you plan to connect a 3-pin fan, please connect it to Pin 1-3. CPU_FAN1 +12V CPU_F AN_SPEED...
  • Page 50 ATX Power Connector (24-pin ATXPWR1) (see p.7, No. 9) This motherboard provides a 24-pin ATX power connector. To use a 20-pin ATX power supply, please plug it along Pin 1 and Pin 13. ATXPWR1 ATX 12V Power Connector (8-pin ATX12V1) (see p.7, No. 1) This motherboard provides a 8-pin ATX 12V power connector.
  • Page 51 B850M Pro-A WiFi B850M Pro-A ATX 12V Power Connector (4-pin ATX12V2) (see p.7, No. 2) Please connect an ATX 12V power supply to this connector. *The power supply plug fits into this connector in only one orientation. *Connecting an ATX 12V 4-pin cable to ATX12V2 is optional.
  • Page 52 RGB LED Header (4-pin RGB_LED1) (see p.7, No. 7) This RGB header is used to connect RGB LED extension cable which allow users to choose from various LED lighting effects. Caution: Never install the RGB LED cable in the wrong orientation; otherwise, the cable may be damaged.
  • Page 53 B850M Pro-A WiFi B850M Pro-A Addressable LED Headers (3-pin ADDR_LED1) (see p.7, No. 25) (3-pin ADDR_LED2) (see p.7, No. 26) (3-pin ADDR_LED3) (see p.7, No. 6) These headers are used to connect Addressable LED extension cables which allow users to choose from various LED lighting effects.
  • Page 54 1. Never install the Addressable LED cable in the wrong orientation; otherwise, the cable may be damaged. 2. Before installing or removing your Addressable LED cable, please power off your system and unplug the power cord from the power supply. Failure to do so may cause damages to motherboard components.

  • Page 55: Smart Switches

    B850M Pro-A WiFi B850M Pro-A 2.14 Smart Switches The motherboard has one smart switch: BIOS Flashback Button, allowing users to flash the BIOS. BIOS Flashback Button (BIOS_FB1) (see p.9, 10) BIOS Flashback Button allows users to flash the BIOS. BIOS_FB1...
  • Page 56 ASRock BIOS Flashback feature allows you to update BIOS without powering on the system, even without CPU. Before using the BIOS Flashback function, please suspend BitLocker and any encryp- tion or security relying on the TPM. Make sure that you have already stored and backup-ed the recovery key.

  • Page 57: Post Status Checker

    B850M Pro-A WiFi B850M Pro-A 2.15 Post Status Checker Post Status Checker (PSC) diagnoses the computer when users power on the machine. The LEDs light up to show what component is running into an issue. They emit red, yel- low, white and yellow-green lights to indicate, respectively, the CPU, memory, VGA and storage are not detected or fail.
  • Page 58 2.16 M.2 WiFi/BT PCIe WiFi Module Installation Guide (B850M Pro-A) The M.2 is a small size and versatile card edge connector that aims to replace mPCIe and mSATA. The M.2 Socket (Key E) supports type 2230 WiFi/BT PCIe WiFi module. * The M.2 socket does not support SATA M.2 SSDs.
  • Page 59 B850M Pro-A WiFi B850M Pro-A Step 3 Gently insert the WiFi/BT PCIe WiFi module into the M.2 slot. Please be aware that the module only fits in one orientation. Step 4 Tighten the screw with a screwdriver to secure the module into place.
  • Page 60 2.17 M.2 SSD Installation Guide (M2_1) The M.2 is a small size and versatile card edge connector that aims to replace mPCIe and mSATA. The Blazing M.2 Socket (M2_1, Key M) supports type 2280 PCIe Gen5x4 (128 Gb/s) mode. * M2_1 is the first priority for M.2 installation. * M2_1 will run at Gen5x4 with 9000 and 7000 series processors, Gen4x4 with 8000 (Phoenix 1) series processors and Gen4x2 with 8000 (Phoenix 2) series processors.
  • Page 61 B850M Pro-A WiFi B850M Pro-A Step 3 Before installing a M.2 SSD, please loosen the screws to remove the M.2 heatsink. *Please remove the protective films on the bottom side of the M.2 heatsink before you install a M.2 SSD.
  • Page 62 M.2 connector (3). *Please do not overtighten the screw as this might damage the M.2 SSD and M.2 heatsink. For the latest updates of M.2 SSD support list, please visit our website for details: http:// www.asrock.com...
  • Page 63 B850M Pro-A WiFi B850M Pro-A 2.18 M.2 SSD Installation Guide (M2_2 and M2_3) The M.2 is a small size and versatile card edge connector that aims to replace mPCIe and mSATA. The Hyper M.2 Sockets (M2_2 and M2_3, Key M) support type 2280 PCIe Gen4x4 (64 Gb/s) mode.
  • Page 64 Ensure that the notch at the end of the M.2 SSD aligns with the nut. Then secure the M.2 SSD by turning the nut lock clockwise to its locked position. For the latest updates of M.2 SSD support list, please visit our website for details: http:// www.asrock.com...

  • Page 65: Copyright Notice

    (including damages for loss of profits, 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...

  • Page 66: Fcc Compliance Statement

    FCC Compliance Statement This 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.
  • Page 67 ASRock follows the green design concept to design and manufacture our products, and makes sure that each stage of the product life cycle of ASRock product is in line with global environmental regulations. In addition, ASRock disclose the relevant information based on regulation requirements.
  • Page 68 If you require assistance please call ASRock Tel : +886-2-28965588 ext.123 (Standard International call charges apply)
  • Page 69 European Community Radio Equipment Directive Compliance Statement This device complies with directive 2014/53/EU issued by the Commision of the European Community. This equipment complies with EU radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator &...
  • Page 71 BSMI 限用物質及元素清單 限用物質及其化學符號 單元 鉛 (Pb) 鎘 (Cd) 汞 (Hg) 六價鉻 (Cr 多溴聯苯 (PBB) 多溴聯苯醚 (PBDE) 電路板 電子元件 線材 配件 備考 1.〝超出 0.1 wt %〞及〝超出 0.01 wt %〞係指限用物質之百分比含量超出百分比含量 基準值。 備考 2.〝○〞係指該項限用物質之百分比含量未超出百分比含量基準值。 備考 3.〝－〞係指該項限用物質為排除項目。...
  • Page 72 China RoHS 电子信息产品污染控制标示 依据中国发布的「电子信息产品污染控制管理办法」及 SJ/T 11364-2006「电子信息产 品污染控制标示要求」，电子信息产品应进行标示，藉以向消费者揭露产品中含有的 有毒有害物质或元素不致发生外泄或突变从而对环境造成污染或对人身、财产造成严 重损害的期限。依上述规定，您可于本产品之印刷电路板上看见图一之标示。图一中 之数字为产品之环保使用期限。由此可知此主板之环保使用期限为 10 年。 图一 有毒有害物质或元素的名称及含量说明 若您欲了解此产品的有毒有害物质或元素的名称及含量说明，请参照以下表格及说明。 有害物质或元素 部件名称 铅 (Pb) 镉 (Cd) 汞 (Hg) 六价铬 (Cr(VI)) 多溴联苯 (PBB) 多溴二苯醚 (PBDE) 印刷电路板 及电子组件 外部信号连 接头及线材 以上表格依据 SJ/T 11364-2014 的规定编制。 O: 表示该有害物质在该部件所有均质材料中的含量均在 GB/T 26572 规定的限量要求以下。 X: 表示该有害物质至少在该部件的某一均质材料中的含量超出...

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