ASROCK 8850M STEEL LEGEND WiFi User Manual
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ASROCK 8850M STEEL LEGEND WiFi User Manual

ASROCK 8850M STEEL LEGEND WiFi User Manual

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Summary of Contents for ASROCK 8850M STEEL LEGEND WiFi

  • 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...

  • Page 3: Table Of Contents

    Chapter 1 Introduction Package Contents Specifications Motherboard Layout I/O Panel Block Diagram 802.11be Wi-Fi 7 Module and ASRock WiFi 2.4/5/6 GHz Antennas Chapter 2 Installation Installing the CPU Installing the CPU Fan and Heatsink Installing Memory Modules (DIMM) Connecting the Front Panel Header...
  • Page 4 2.13 Smart Button 2.14 Post Status Checker 2.15 M.2 SSD Installation Guide (M2_1) 2.16 M.2 SSD Installation Guide (M2_2) 2.17 M.2 SSD Installation Guide (M2_3)

  • Page 5: Chapter 1 Introduction

    If you require technical support related to this mother- board, 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/) Expansion CPU: Slot •...
  • Page 7 B850M Steel Legend WiFi 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 CPU: • 1 x USB 3.2 Gen2 Type-C (Rear) • 1 x USB 3.2 Gen2 Type-A (Rear) • 1 x USB 3.2 Gen1 Type-A (Rear (USB32_2)) Chipset: • 1 x USB 3.2 Gen1 Type-C (Front) • 5 x USB 3.2 Gen1 Type-A (1 Rear (USB32_3), 4 Front) •...
  • Page 9 B850M Steel Legend WiFi 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 stor- age devices* * Requires additional M.2 NVMe expansion cards to support RAID 10 Connector •...
  • Page 10 • ErP/EuP ready (ErP/EuP ready power supply is required) * 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.

  • Page 11: Motherboard Layout

    B850M Steel Legend WiFi 1.3 Motherboard Layout CPU_FAN1 ATX12V2 ATX12V1 BIOS _FB1 USB 3.2 Gen2 T: USB32_1 B: USB32_TC1 USB 3.2 Gen1 Top: T: USB32_2 RJ-45 B: USB32_3 M2_WIFI_2 CPU_FAN2 PCIE1 SPI_TPM_J1 BIOS B850 PCIE2 RoHS AUDIO CODEC CHA_FAN3 USB_7_8 USB_5_6 USB32_6_7 SPK_PLED1...
  • Page 12 No. Description 8 pin 12V Power Connector (ATX12V1) 4 pin 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 ) ATX Power Connector (ATXPWR1) Front Panel Type C USB 3.2 Gen1 Header (USB32_TC2) SATA3 Connector (SATA3_1)

  • Page 13: I/O Panel

    B850M Steel Legend WiFi 1.4 I/O Panel No. Description No. Description 2.5G LAN RJ-45 Port* USB 2.0 Ports (USB_1234) 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)** BIOS Flashback Button Antenna Ports HDMI Port...

  • Page 14: Block Diagram

    1.5 Block Diagram...

  • Page 15: 802.11Be Wi-Fi 7 Module And Asrock Wifi 2.4/5/6 Ghz Antennas

    B850M Steel Legend WiFi 1.6 802.11be Wi-Fi 7 Module and ASRock WiFi 2.4/5/6 GHz Antennas 802.11be Wi-Fi 7 + BT Module This motherboard comes with an exclusive 802.11 a/b/g/n/ac/ax/axe/be Wi-Fi 7 + BT v5.4 module that offers support for 802.11 a/b/g/n/ac/ax/axe/be Wi-Fi 7 connectivity standards and Bluetooth v5.4.
  • Page 16 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. Step 3 Set the WiFi 2.4/5/6 GHz Antenna as shown in the illustration.

  • Page 17: Chapter 2 Installation

    B850M Steel Legend WiFi 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 18: Installing The Cpu

    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. Do not force to insert the CPU into the socket if above situation is found.
  • Page 19 B850M Steel Legend WiFi Carefully place the CPU in as flat as possible. Do not drop it.
  • Page 20 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 to return the motherboard for after service.

  • Page 21: Installing The Cpu Fan And Heatsink

    B850M Steel Legend WiFi 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.
  • Page 23 B850M Steel Legend WiFi Installing the CPU Cooler (Type 2)
  • Page 25 B850M Steel Legend WiFi +12V *The illustrations shown here are for reference purposes only and may not exactly match the model you purchase.
  • Page 26 Installing the CPU Cooler (Type 3)
  • Page 27 B850M Steel Legend WiFi...
  • Page 29 +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 30: Installing Memory Modules (Dimm)

    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. 2.
  • Page 31 B850M Steel Legend WiFi...

  • Page 32: Connecting The Front Panel Header

    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 (+) PANEL1...

  • Page 33: Installing The Motherboard

    B850M Steel Legend WiFi 2.5 Installing the Motherboard TB 1...

  • Page 34: Installing Sata Drives

    2.6 Installing SATA Drives Optical Drive SATA Drive SATA Data Cable...
  • Page 35 B850M Steel Legend WiFi SATA Power Connector SATA Data Connector...

  • Page 36: Installing A Graphics Card

    2.7 Installing a Graphics Card CLICK!
  • Page 37 B850M Steel Legend WiFi Removing a Graphics Card from PCIE1 Slot Please follow the steps below to release the PCIe slot latch on PCIE1 and remove the graphics card. 1. Press down the latch to release the graphics card from the PCIe slot. 2.
  • Page 38 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 39: Connecting Peripheral Devices

    B850M Steel Legend WiFi 2.8 Connecting Peripheral Devices...

  • Page 40: Connecting The Power Connectors

    2.9 Connecting the Power Connectors...

  • Page 41: Power On

    B850M Steel Legend WiFi 2.10 Power On...

  • Page 42: Jumpers Setup

    2.11 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”. Clear CMOS Jumper (CLRCMOS1) (see p.7, No. 17) CLRCMOS1 allows you to clear the data in CMOS.

  • Page 43: Onboard Headers And Connectors

    B850M Steel Legend WiFi 2.12 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 44 Power LED and Speaker Header (7-pin SPK_PLED1) (see p.7, No. 16) Please connect the chassis power LED and the chassis speaker to this header. SPK_PLED1 SPEAKER DUMMY DUMMY PLED+ PLED+ PLED- TB 1 Serial ATA3 Connectors Vertical: (SATA3_1) (see p.7, No. 10) (SATA3_2) (see p.7, No.
  • Page 45 B850M Steel Legend WiFi USB 2.0 Headers (9-pin USB_5_6) (see p.7, No. 22) (9-pin USB_7_8) (see p.7, No. 23) There are two headers on this motherboard. Each USB 2.0 header can support two ports. USB_5_6 USB_PWR DUMMY TB 1 USB_PWR USB_7_8 USB_PWR DUMMY...
  • Page 46 USB 3.2 Gen1 Headers (19-pin USB32_4_5) (see p.7, No. 12) (19-pin USB32_6_7) (see p.7, No. 18) There are two headers on this motherboard. Each USB 3.2 Gen1 header can support two ports. USB32_4_5 Vbus Vbus Vbus IntA_PB_SSRX- IntA_PA_SSRX- IntA_PB_SSRX+ IntA_PA_SSRX+ IntA_PB_SSTX- IntA_PA_SSTX- IntA_PB_SSTX+...
  • Page 47 B850M Steel Legend WiFi Front Panel Type C USB 3.2 Gen1 Header (20-pin USB32_TC2) (see p.7, No. 9) 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. 25) (4-pin CHA_FAN2) (see p.7, No. 24) (4-pin CHA_FAN3) (see p.7, No. 21) 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_FAN3 FAN_VOLTAGE CHA_FAN_SPEED...
  • Page 49 B850M Steel Legend WiFi 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 FAN_SPEED_CONTROL TB 1 CPU Fan Connector (4-pin CPU_FAN2) (see p.7, No.
  • Page 50 ATX Power Connector (24-pin ATXPWR1) (see p.7, No. 8) 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 TB 1 ATX 12V Power Connector (8-pin ATX12V1) (see p.7, No.
  • Page 51 B850M Steel Legend WiFi 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. *For advanced overclocking we suggest using this connector together with ATX12V1.
  • Page 52 Thermistor Cable Header (2-pin T_SENSOR1) (see p.7, No. 20) The Thermistor Cable Headers are used to connect thermistor cables to monitor the temperature of the critical components. Plug the thermistor cable that comes with the package to this header, and then attach the sensor end to the component to detect the temperature.
  • Page 53 B850M Steel Legend WiFi 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 54 Addressable LED Headers (3-pin ADDR_LED1) (see p.7, No. 26) (3-pin ADDR_LED2) (see p.7, No. 27) (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. Caution: Never install the Addressable LED cable in the wrong orientation;...
  • Page 55 B850M Steel Legend WiFi 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 56: Smart Button

    2.13 Smart Button The motherboard has a smart button: BIOS Flashback Button, allowing users to flash the BIOS. BIOS Flashback Button (BIOS_FB1) (see p.9, No. 10) BIOS Flashback Button allows users to flash the BIOS. BIOS_FB1 TB 1 USB BIOS Flashback port...
  • Page 57 B850M Steel Legend WiFi 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 58: Post Status Checker

    2.14 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 59 B850M Steel Legend WiFi 2.15 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.
  • Page 60 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. Step 4 Align and gently insert the M.2 SSD into the M.2 slot.
  • Page 61 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 module support list, please visit our website for details: http://www.asrock.com...
  • Page 62 2.16 M.2 SSD Installation Guide (M2_2) The M.2 is a small size and versatile card edge connector that aims to replace mPCIe and mSATA. The M.2 Socket (M2_2, Key M), supports type 2260/2280 PCIe Gen4x2 (32 Gb/s) mode. Installing the M.2 SSD Step 1 Prepare a M.2 SSD.
  • Page 63 B850M Steel Legend WiFi Step 3 Use a screwdriver to remove the standoff. Skip Step 3 if your M.2 SSD is Type 2280. Step 4 Peel off the yellow protective film on the nut to be used. Tighten the standoff into the desired nut location on the motherboard with a screwdriver.
  • 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 B850M Steel Legend WiFi 2.17 M.2 SSD Installation Guide (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 Socket (M2_3, Key M), supports type 2260/2280 PCIe Gen4x4 (64 Gb/s) mode.
  • Page 66 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. Step 4 Peel off the yellow protective film on the nut to be used.
  • Page 67 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 68: 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 69: 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 70 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 71 If you require assistance please call ASRock Tel : +886-2-28965588 ext.123 (Standard International call charges apply)
  • Page 72 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 &...

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