ASROCK B450M/ac R2.0 User Manual
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ASROCK B450M/ac R2.0 User Manual

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Summary of Contents for ASROCK B450M/ac R2.0

  • Page 2 (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 the documentation or product.
  • Page 3 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 : +886-2-28965588 ext.123 (Standard International call charges apply) The terms HDMI®...
  • Page 4 CE Warning 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 5: Table Of Contents

    Contents Chapter 1 Introduction Package Contents Specifications Motherboard Layout I/O Panel WiFi-802.11ac Module and ASRock WiFi 2.4/5 GHz Antenna Chapter 2 Installation Installing the CPU Installing the CPU Fan and Heatsink Installing Memory Modules (DIMM) Expansion Slots (PCI Express Slots)
  • Page 6 3.3.2 Apps 3.3.3 BIOS & Drivers 3.3.4 Setting ASRock Polychrome SYNC Chapter 4 UEFI SETUP UTILITY Introduction 4.1.1 UEFI Menu Bar 4.1.2 Navigation Keys Main Screen OC Tweaker Screen Advanced Screen 4.4.1 CPU Configuration 4.4.2 North Bridge Configuration 4.4.3 South Bridge Configuration 4.4.4 Storage Configuration...

  • Page 7: Chapter 1 Introduction

    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 8: Specifications

    * For Ryzen Series CPUs (Picasso and Raven Ridge), ECC is only supported with PRO CPUs. * Please refer to Memory Support List on ASRock's website for more information. (http://www.asrock.com/) • Max. capacity of system memory: 64GB • Supports Extreme Memory Profile (XMP) memory modules • 15μ...
  • Page 9 B450M/ac R2.0 AMD Ryzen series CPUs (Picasso, Raven Ridge) • 1 x PCI Express 3.0 x16 Slot (PCIE1: x8 mode)* 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode) AMD Athlon series CPUs • 1 x PCI Express 3.0 x16 Slot (PCIE1: x4 mode)* • 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)
  • Page 10 Gb/s) (with Matisse, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16 Gb/s) (with Athlon series APU)* * Supports NVMe SSD as boot disks * Supports ASRock U.2 Kit Connector • 1 x Chassis Intrusion Header • 1 x Power LED and Speaker Header • 1 x RGB LED Header...
  • Page 11 B450M/ac R2.0 • 1 x Chassis Fan Connector (3-pin) * The Chassis Fan Connector supports the chassis fan of maximum 1A (12W) fan power. • 1 x Chassis/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control) * The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.
  • Page 12 * For detailed product information, please visit our website: http://www.asrock.com Please realize that there is a certain risk involved with overclocking, including adjust- ing 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 13: Motherboard Layout

    B450M/ac R2.0 1.3 Motherboard Layout AMD_FAN_LED1 M2_WIFI CPU_FAN1 ATX12V1 USB 2.0 T: USB1 B: USB2 USB 3.2 Gen1 T: USB1 B: USB2 USB 3.2 Gen1 T: USB3 B: USB4 Ultra M.2 PCIe Gen3 x4 CHA_FAN1 BIOS M2_1_CT1 M2_1_CT2 M2_1_CT3 PCIE1...
  • Page 14 No. Description ATX 12V Power Connector (ATX12V1) CPU Fan Connector (CPU_FAN1) 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1) 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2) AMD Fan LED Header (AMD_FAN_LED1) ATX Power Connector (ATXPWR1) USB 3.2 Gen1 Header (USB3_5_6) AMD LED Fan USB Header (USB_7) SATA3 Connector (SATA3_3)(Upper) SATA3 Connector (SATA3_4)(Lower)

  • Page 15: I/O Panel

    B450M/ac R2.0 1.4 I/O Panel No. Description No. Description LAN RJ-45 Port* USB 3.2 Gen1 Ports (USB3_1_2) Line In (Light Blue)** HDMI Port Front Speaker (Lime)** USB 2.0 Ports (USB_1_2) Microphone (Pink)** Antenna Ports USB 3.2 Gen1 Ports (USB3_3_4) * There are two LEDs on each LAN port. Please refer to the table below for the LAN port LED indications.

  • Page 16: Wifi-802.11Ac Module And Asrock Wifi 2.4/5 Ghz Antenna

    1.5 WiFi-802.11ac Module and ASRock WiFi 2.4/5 GHz Antenna WiFi-802.11ac + BT Module This motherboard comes with an exclusive WiFi 802.11 a/b/g/n/ac + BT v4.2 module (pre-installed on the rear I/O panel) that offers support for WiFi 802.11 a/b/ g/n/ac connectivity standards and Bluetooth v4.2. WiFi + BT module is an easy-to- use wireless local area network (WLAN) adapter to support WiFi + BT.
  • Page 17 B450M/ac R2.0 WiFi Antennas Installation Guide Step 1 Prepare the WiFi 2.4/5 GHz Antennas that come with the package. Step 2 Connect the two WiFi 2.4/5 GHz Antennas to the antenna connectors. Turn the antenna clock- wise 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

    B450M/ac R2.0 2.1 Installing the CPU Unplug all power cables before installing the CPU.

  • Page 21: Installing The Cpu Fan And Heatsink

    B450M/ac R2.0 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 B450M/ac R2.0 Installing the AM4 Box Cooler SR2...
  • Page 25 B450M/ac R2.0 4-pin FAN cable RGB LED Cable +12V *The diagram shown here are for reference only. Please refer to page 34 for the orientation of AMD Fan LED Header (AMD_FAN_LED1).
  • Page 26 Installing the AM4 Box Cooler SR3...
  • Page 27 B450M/ac R2.0...
  • Page 28 4-pin FAN cable...
  • Page 29 +12V Please note that only one cable should be used at a time in this step. If you select AMD_FAN_LED1, please install ASRock utility "ASRock Polychrome SYNC". If you select USB connector, please install AMD utility "SR3 Settings Software". *The diagram shown here are for reference only. Please refer to page 34 for the orientation of AMD Fan...

  • Page 30: Installing Memory Modules (Dimm)

    2.3 Installing Memory Modules (DIMM) This motherboard provides four 288-pin DDR4 (Double Data Rate 4) 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) DDR4 DIMM pairs. 2.
  • Page 31 B450M/ac R2.0 Ryzen Series CPUs (Picasso): UDIMM Memory Slot Frequency (Mhz) 2933 2667 2667 2400 2133 SR/DR SR/DR 1866 SR/DR SR/DR SR/DR SR/DR 1866 Ryzen Series CPUs (Summit Ridge): UDIMM Memory Slot Frequency (Mhz) 2667 2667 2667 2667 2667 SR/DR...
  • Page 32 Ryzen Series CPUs (Raven Ridge): UDIMM Memory Slot Frequency (Mhz) 2933 2667 2667 2667 2667 SR/DR SR/DR 2667 SR/DR SR/DR SR/DR SR/DR 2133-2400 SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label...
  • Page 33 B450M/ac R2.0 The DIMM only fits in one correct orientation. It will cause permanent damage to the motherboard and the DIMM if you force the DIMM into the slot at incorrect orientation.

  • Page 34: Expansion Slots (Pci Express Slots)

    2.4 Expansion Slots (PCI Express 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 35: Jumpers Setup

    B450M/ac R2.0 2.5 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...

  • Page 36: Onboard Headers And Connectors

    2.6 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 Connect the power PLED+ PLED-...
  • Page 37 B450M/ac R2.0 Power LED and Speaker Please connect the SPEAKER DUMMY Header chassis power LED and DUMMY (7-pin SPK_PLED1) the chassis speaker to this (see p.7, No. 14) header. PLED+ PLED+ PLED- Serial ATA3 Connectors These four SATA3 (SATA3_1: connectors support SATA see p.7, No.
  • Page 38 USB 3.2 Gen1 Header There is one header on Vbus Vbus Vbus IntA_PB_SSRX- (19-pin USB3_5_6) this motherboard. Each IntA_PA_SSRX- IntA_PB_SSRX+ IntA_PA_SSRX+ (see p.7, No. 7) USB 3.2 Gen1 header can IntA_PB_SSTX- IntA_PA_SSTX- IntA_PB_SSTX+ support two ports. IntA_PA_SSTX+ IntA_PB_D- IntA_PA_D- IntA_PB_D+ IntA_PA_D+ Dummy Front Panel Audio Header...
  • Page 39 B450M/ac R2.0 Chassis/Water Pump Fan This motherboard FAN_SPEED_CONTROL CHA_FAN_SPEED Connectors provides one 4-Pin water FAN_VOLTAGE (4-pin CHA_FAN2/WP) cooling chassis fan (see p.7, No. 23) connectors. If you plan to connect a 3-Pin chassis water cooler fan, please connect it to Pin 1-3.
  • Page 40 AMD FAN LED Header AMD FAN LED Header is used (4-pin AMD_FAN_ to connect RGB LED 12V G R LED1) extension cable that comes with (see p.7, No. 5) AMD heatsink. The cable connection allows users to choose from various LED lighting effects.
  • Page 41 B450M/ac R2.0 2.7 M.2_SSD (NGFF) Module Installation Guide (M2_1) The M.2, also known as the Next Generation Form Factor (NGFF), is a small size and versatile card edge connector that aims to replace mPCIe and mSATA. The Ultra M.2 Socket (M2_1) supports M Key type 2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32 Gb/s) (with Matisse, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16 Gb/s) (with Athlon series APU).
  • Page 42 Step 3 Move the standoff based on the module type and length. The standoff is placed at the nut location C by default. Skip Step 3 and 4 and go straight to Step 5 if you are going to use the default nut. Otherwise, release the standoff by hand.
  • Page 43 B450M/ac R2.0 Step 6 Tighten the screw with a screwdriver to secure the module into place. Please do not overtighten the screw as this might damage the module. NUT2 NUT1 M.2_SSD (NGFF) Module Support List Vendor Interface Intel PCIe INTEL 6000P-SSDPEKKF256G7 (nvme)

  • Page 44: Chapter 3 Software And Utilities Operation

    Chapter 3 Software and Utilities Operation 3.1 Installing Drivers The Support CD that comes with the motherboard contains necessary drivers and useful utilities that enhance the motherboard’s features. Running The Support CD To begin using the support CD, insert the CD into your CD-ROM drive. The CD automatically displays the Main Menu if “AUTORUN”...

  • Page 45: A-Tuning

    B450M/ac R2.0 3.2 A-Tuning A-Tuning is ASRock’s multi purpose software suite with a new interface, more new features and improved utilities. 3.2.1 Installing A-Tuning A-Tuning can be downloaded from ASRock Live Update & APP Shop. After the installation, you will find the icon “A-Tuning“ on your desktop. Double-click the “A-Tuning“...
  • Page 46 OC Tweaker Configurations for overclocking the system. System Info View information about the system. *The System Browser tab may not appear for certain models.
  • Page 47 Configure up to five different fan speeds using the graph. The fans will automatically shift to the next speed level when the assigned temperature is met. Settings Configure ASRock A-Tuning. Click to select "Auto run at Windows Startup" if you want A-Tuning to be launched when you start up the Windows operating system.

  • Page 48: Asrock Live Update & App Shop

    Double-click on your desktop to access ASRock Live Update & APP Shop utility. *You need to be connected to the Internet to download apps from the ASRock Live Update & APP Shop. 3.3.1 UI Overview Category Panel Hot News...

  • Page 49: Apps

    B450M/ac R2.0 3.3.2 Apps When the "Apps" tab is selected, you will see all the available apps on screen for you to download. Installing an App Step 1 Find the app you want to install. The most recommended app appears on the left side of the screen. The other various apps are shown on the right.
  • Page 50 Step 3 If you want to install the app, click on the red icon to start downloading. Step 4 When installation completes, you can find the green "Installed" icon appears on the upper right corner. To uninstall it, simply click on the trash can icon *The trash icon may not appear for certain apps.
  • Page 51 B450M/ac R2.0 Upgrading an App You can only upgrade the apps you have already installed. When there is an available new version for your app, you will find the mark of "New Version" appears below the installed app icon. Step 1 Click on the app icon to see more details.

  • Page 52: Bios & Drivers

    3.3.3 BIOS & Drivers Installing BIOS or Drivers When the "BIOS & Drivers" tab is selected, you will see a list of recommended or critical updates for the BIOS or drivers. Please update them all soon. Step 1 Please check the item information before update. Click on to see more details.

  • Page 53: Setting

    B450M/ac R2.0 3.3.4 Setting In the "Setting" page, you can change the language, select the server location, and determine if you want to automatically run the ASRock Live Update & APP Shop on Windows startup.

  • Page 54: Asrock Polychrome Sync

    3.5 ASRock Polychrome SYNC ASRock Polychrome SYNC is a lighting control utility specifically designed for unique indi- viduals with sophisticated tastes to build their own stylish colorful lighting system. Simply by connecting the LED strip, you can customize various lighting schemes and patterns, including Static, Breathing, Strobe, Cycling, Music, Wave and more.
  • Page 55 B450M/ac R2.0 Connecting the Addressable RGB LED Strip Connect your Addressable RGB LED strip to the Addressable LED Header (ADDR_LED1) on the motherboard. ADDR_LED1 DO_ADDR VOUT B450M/ac 1. Never install the RGB LED cable in the wrong orientation; otherwise, the cable may be damaged.
  • Page 56 ASRock Polychrome SYNC Utility Now you can adjust the RGB LED color through the ASRock Polychrome SYNC Utility. Download this utility from the ASRock Live Update & APP Shop and start coloring your PC style your way! Drag the tab to customize your preference.

  • Page 57: Chapter 4 Uefi Setup Utility

    B450M/ac R2.0 Chapter 4 UEFI SETUP UTILITY 4.1 Introduction This section explains how to use the UEFI SETUP UTILITY to configure your system. You may run the UEFI SETUP UTILITY by pressing <F2> or <Del> right after you power on the computer, otherwise, the Power-On-Self-Test (POST) will continue with its test routines.

  • Page 58: Navigation Keys

    4.1.2 Navigation Keys Use < > key or < > key to choose among the selections on the menu bar, and use < > key or < > key to move the cursor up or down to select items, then press <Enter>...

  • Page 59: Main Screen

    B450M/ac R2.0 4.2 Main Screen When you enter the UEFI SETUP UTILITY, the Main screen will appear and display the system overview.

  • Page 60: Oc Tweaker Screen

    4.3 OC Tweaker Screen In the OC Tweaker screen, you can set up overclocking features. Because the UEFI software is constantly being updated, the following UEFI setup screens and descriptions are for reference purpose only, and they may not exactly match what you see on your screen.
  • Page 61 B450M/ac R2.0 SMT Mode This item can be used to disable symmetric multithreading. To re-enable SMT, a power cycle is needed after selecting [Auto]. Warning: S3 is not supported on systems where SMT is disabled. DRAM Timing Configuration DRAM Frequency If [Auto] is selected, the motherboard will detect the memory module(s) inserted and assign the appropriate frequency automatically.
  • Page 62 Save User UEFI Setup Profile to Disk It helps you to save current UEFI settings as an user profile to disk. Load User UEFI Setup Profile from Disk You can load previous saved profile from the disk.

  • Page 63: Advanced Screen

    B450M/ac R2.0 4.4 Advanced Screen In this section, you may set the configurations for the following items: CPU Configuration, North Bridge Configuration, South Bridge Configuration, Storage- Configuration, ACPI Configuration, Trusted Computing , AMD CBS and AMD PBS. Setting wrong values in this section may cause the system to malfunction.

  • Page 64: Cpu Configuration

    4.4.1 CPU Configuration Cool 'n' Quiet Use this item to enable or disable AMD’s Cool ‘n’ Quiet technology. The default value is ® [Enabled]. Configuration options: [Enabled] and [Disabled]. If you install Windows OS and want to enable this function, please set this item to [Enabled]. Please note that enabling this function may reduce CPU voltage and memory frequency, and lead to system stability or compatibility issue with some memory modules or power supplies.

  • Page 65: North Bridge Configuration

    B450M/ac R2.0 4.4.2 North Bridge Configuration SR-IOV Support Enable/disable the SR-IOV (Single Root IO Virtualization Support) if the system has SR-IOV capable PCIe devices. UMA Frame Buffer size This item controls the amount of system memory that is allocated to the integrated...

  • Page 66: South Bridge Configuration

    4.4.3 South Bridge Configuration Onboard HD Audio Enable/disable onboard HD audio. Set to Auto to enable onboard HD audio and automatically disable it when a sound card is installed. Front Panel Enable/disable front panel HD audio. Deep Sleep Configure deep sleep mode for power saving when the computer is shut down. Restore on AC/Power Loss Select the power state after a power failure.

  • Page 67: Storage Configuration

    B450M/ac R2.0 4.4.4 Storage Configuration SATA Controller(s) Enable/disable the SATA controllers. SATA Mode AHCI: Supports new features that improve performance. RAID: Combine multiple disk drives into a logical unit. SATA Hot Plug Enable/disable the SATA Hot Plug function.

  • Page 68: Acpi Configuration

    4.4.5 ACPI Configuration Suspend to RAM It is recommended to select auto for ACPI S3 power saving. ACPI HPET Table Enable the High Precision Event Timer for better performance and to pass WHQL tests. PS/2 Keyboard Power On Allow the system to be waked up by a PS/2 Keyboard. PCIE Devices Power On Allow the system to be waked up by a PCIE device and enable wake on LAN.

  • Page 69: Trusted Computing

    B450M/ac R2.0 4.4.6 Trusted Computing Security Device Support Enable to activate Trusted Platform Module (TPM) security for your hard disk drives.

  • Page 70: Amd Cbs

    4.4.7 AMD CBS Zen Common Options RedirectForReturnDis From a workaround for GCC/C000005 issue for XV Core on CZ A0, setting MSRC001_1029 Decode Configuration (DE_CFG) bit 14 [DecfgNoRdrctForReturns] to 1. L2 TLB Associativity 0 - L2 TLB ways [11:8] are fully associative. 1 - =L2 TLB ways [11:8] are 4K-only. Platform first Error Handling Enable/disable PFEH, cloak individual banks, and mask deferred error interrupts from each bank.
  • Page 71 B450M/ac R2.0 Opcache Control Enables or disables the Opcache. OC Mode OC1 - 16 cores/3.6GHz on 1.3375V OC2 - 8 cores/3.7GHz on 1.369V OC3 - 4 cores/3.75GHz on 1.374V\nMax Stress - 16 cores/3.8GHz on 1.400V SEV-ES ASID Space Limit SEV VMs using ASIDs below the SEV-ES ASID Space Limit must enable the SEV-ES feature.
  • Page 72 GMI encryption control GMI encryption control Control GMI link encryption xGMI encryption control Control xGMI link encryption CC6 memory region encryption Control whether or not the CC6 save/restore memory is encrypted Location of private memory regions Controls whether or not the private memory regions (PSP, SMU and CC6) are at the top of DRAM or distributed.
  • Page 73 B450M/ac R2.0 UMC Common Options DDR4 Common Options DRAM Controller Configuration DRAM Controller Configuration DRAM Power Options Cmd2T Select between 1T and 2T mode on ADDR/CMD Gear Down Mode Configure the Gear Down Mode. CAD Bus Configuration CAD Bus Timing User Controls...
  • Page 74 DRAM Memory Mapping Chipselect Interleaving Interleave memory blocks across the DRAM chip selects for node 0. BankGroupSwap Configure the BankGroupSwap. BankGroupSwapAlt Configure BankGroupSwapAlt. Address Hash Bank Configure the bank address hashing. Address Hash CS Configure the CS address hashing. NVDIMM Memory MBIST MBIST Enable Configure the Memory MBIST.
  • Page 75 B450M/ac R2.0 Determinism Slider [Auto] Use default performance determinism settings cTDP Control [Auto] Use the fused cTDP. [Manual] User can set customized cTDP. Fan Control [Auto] Use the default fan controller settings. [Manual] User can set customized fan controller settings.
  • Page 76 SATA Controller Disable or enable OnChip SATA controller Sata RAS Support Disable or enable Sata RAS Support Sata Disabled AHCI Prefetch Function Configure the Sata Disabled AHCI Prefetch function. Aggresive SATA Device Sleep Port 0 Configure the Aggresive SATA Device Sleep Port 0. Aggresive SATA Device Sleep Port 1 Configure the Aggresive SATA Device Sleep Port 1.
  • Page 77 B450M/ac R2.0 Chipselect Interleaving Interleave memory blocks across the DRAM chip selects for node 0. BankGroupSwap Configure the BankGroupSwap. BankGroupSwapAlt Configure the BankGroupSwapAlt. Address Hash Bank Configure the bank address hashing. Address Hash CS Configure the CS address hashing. NVDIMM...

  • Page 78: Amd Pbs

    4.4.8 AMD PBS The AMD PBS menu accesses AMD specific features.

  • Page 79: Tools

    B450M/ac R2.0 4.5 Tools RGB LED ASRock Polychrome SYNC allows you to adjust the RGB LED color to your liking. Easy RAID Installer Easy RAID Installer helps you to copy the RAID driver from the support CD to your USB storage device. After copying the drivers please change the SATA mode to RAID, then you can start installing the operating system in RAID mode.

  • Page 80: Hardware Health Event Monitoring Screen

    4.6 Hardware Health Event Monitoring Screen This section allows you to monitor the status of the hardware on your system, including the parameters of the CPU temperature, motherboard temperature, fan speed and voltage. CPU Fan 1 Setting Select a fan mode for CPU Fan 1, or choose Customize to set 5 CPU temperatures and assign a respective fan speed for each temperature.
  • Page 81 B450M/ac R2.0 Case Open Feature Enable or disable Case Open Feature to detect whether the chassis cover has been removed.

  • Page 82: Security Screen

    4.7 Security Screen In this section you may set or change the supervisor/user password for the system. You may also clear the user password. Supervisor Password Set or change the password for the administrator account. Only the administrator has authority to change the settings in the UEFI Setup Utility. Leave it blank and press enter to remove the password.

  • Page 83: Boot Screen

    B450M/ac R2.0 4.8 Boot Screen This section displays the available devices on your system for you to configure the boot settings and the boot priority. Fast Boot Fast Boot minimizes your computer's boot time. In fast mode you may not boot from an USB storage device.
  • Page 84 AddOn ROM Display Enable AddOn ROM Display to see the AddOn ROM messages or configure the AddOn ROM if you've enabled Full Screen Logo. Disable for faster boot speed. Above 4G Decoding Enable or disable 64bit capable Devices to be decoded in Above 4G Address Space (only if the system supports 64 bit PCI decoding).

  • Page 85: Exit Screen

    B450M/ac R2.0 4.9 Exit Screen Save Changes and Exit When you select this option the following message, “Save configuration changes and exit setup?” will pop out. Select [OK] to save changes and exit the UEFI SETUP UTILITY. Discard Changes and Exit When you select this option the following message, “Discard changes and exit...
  • Page 86 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 87 13848 Magnolia Ave, Chino, CA91710 Phone/Fax No: +1-909-590-8308/+1-909-590-1026 hereby declares that the product Product Name : Motherboard B450M/ac R2.0 Model Number : Conforms to the following speci cations: FCC Part 15, Subpart B, Unintentional Radiators Supplementary Information: is device complies with part 15 of the FCC Rules. Operation is subject to the...
  • Page 88 EU Declaration of Conformity For the following equipment: Motherboard (Product Name) B450M/ac R2.0/ ASRock (Model Designation / Trade Name) ASRock Incorporation (Manufacturer Name) 2F., No.37, Sec. 2, Jhongyang S. Rd., Beitou District, Taipei City 112, Taiwan (R.O.C.) (Manufacturer Address) EMC —Directive 2014/30/EU (from April 20th, 2016)

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