Learn more about ASRock B450M/AC R2.0ModelBrandASRockModelB450M/AC R2.0Supported CPUCPU Socket TypeAM4CPU TypeSupports AMD AM4 Socket Ryzen 2000, 3000 and 5000 Series Desktop ProcessorsChipsetsChipsetAMD Promontory B450MemoryNumber of Memory Slots4x288pin (DDR4)Memory StandardAMD Ryzen series CPUs (Matisse) support DDR4 3200/ 2933/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory*AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4 3200+(OC)/ 2933(OC)/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory*AMD Ryzen series CPUs (Picasso) support DDR4 2933/ 2667/ 2400/ 2133 non-ECC, un-buffered memory*AMD Ryzen series CPUs (Summit Ridge) support DDR4 3200+(OC)/ 2933(OC)/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory*AMD Ryzen series CPUs (Raven Ridge) support DDR4 3200+(OC)/ 2933/ 2667/ 2400/ 2133 non-ECC, un-buffered memory** For Ryzen Series CPUs (Picasso and Raven Ridge), ECC is only supported with PRO CPUs.Maximum Memory Supported128GB** Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows 32-bit OS. For Windows 64-bit OS with 64-bit CPU, there is no such limitation.Channel SupportedDual ChannelExpansion SlotsPCI Express 3.0 x16AMD Ryzen series CPUs (Matisse, Summit Ridge and Pinnacle Ridge)- 1 x PCI Express 3.0 x16 Slot (PCIE1: x16 mode)*AMD Ryzen series CPUs (Picasso, Raven Ridge)- 1 x PCI Express 3.0 x16 Slot (PCIE1: x8 mode)*AMD Athlon series CPUs- 1 x PCI Express 3.0 x16 Slot (PCIE1: x4 mode)** Supports NVMe SSD as boot disksPCI Express 2.0 x16AMD Ryzen series CPUs (Summit Ridge and Pinnacle Ridge)- 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)AMD Ryzen series CPUs (Raven Ridge)- 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)AMD Athlon series CPUs- 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)Other Slots1 x Vertical M.2 Socket (Key E) with the bundled WiFi-802.11ac module (on the rear I/O)Storage DevicesSATA 6Gb/s4 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot PlugM.21 x Ultra M.2 Socket (M2_1), supports M Key type 2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32Gb/s) (with Matisse, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16Gb/s) (with Athlon series APU)** Supports NVMe SSD as boot disks* Supports ASRock U.2 KitSATA RAID0/1/10Onboard VideoOnboard Video ChipsetIntegrated AMD Radeon Vega Series Graphics in Ryzen Series APU*DirectX 12, Pixel Shader 5.0Shared memory default 2GB. Max Shared memory supports up to 16GB.**Supports HDMI 1.4 with max. resolution up to 4K x 2K (4096x2160) @ 24Hz / (3840x2160) @ 30HzSupports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI 1.4 Port (Compliant HDMI monitor is required)Supports HDCP 1.4 with HDMI 1.4 PortSupports 4K Ultra HD (UHD) playback with HDMI 1.4 Port* Actual support may vary by CPU** The Max shared memory 16GB requires 32GB system memory installedOnboard AudioAudio ChipsetRealtek ALC892/897Audio Channels7.1 CH HD Audio with Content Protection Supports Surge ProtectionOnboard LANLAN ChipsetRealtek RTL8111HMax LAN Speed1GbpsWireless LANIntel 802.11 ac Wi-Fi ModuleSupports IEEE 802.11 a/b/g/n/acSupports Dual-Band (2.4/5 GHz)Supports high speed wireless connections up to 433 MbpsBluetoothBluetooth 4.2 / 3.0 + High speed class IIRear Panel PortsBack I/O Ports2 x Antenna Ports1 x HDMI Port2 x USB 2.0 Ports (Supports ESD Protection)4 x USB 3.2 Gen1 Ports (Supports ESD Protection)1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)HD Audio Jacks: Line in / Front Speaker / MicrophoneInternal I/O ConnectorsOnboard USB2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection)1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection)Other Connectors1 x Chassis Intrusion Header1 x Power LED and Speaker Header1 x RGB LED Header*1 x Addressable LED Header**1 x AMD Fan LED Header***1 x CPU Fan Connector (4-pin)****1 x Chassis Fan Connector (3-pin)*****1 x Chassis/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)******1 x Front Panel Audio Connector1 x AMD LED Fan USB Header*Supports in total up to 12V/3A, 36W LED Strip.**Supports in total up to 5V/3A, 15W LED Strip.***The AMD Fan LED Header supports LED strips of maximum load of 3A (36W) and length up to 2.5M.****The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power.*****The Chassis Fan Connector supports the chassis fan of maximum 1A (12W) fan power.******The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.******CHA_FAN1 can auto detect if 3-pin or 4-pin fan is in use.Physical SpecForm FactorMicro ATXLED LightingNone RGBDimensions (W x L)9.6\" x 9.6\"Power Pin1 x 24-pin ATX Power Connector1 x 8-pin 12V Power ConnectorWindows 11 CompatibilityWindows 11SupportedFeaturesFeaturesUnique Feature:ASRock Super Alloy- Premium 42A Power Choke- Sapphire Black PCB- High Density Glass Fabric PCB- 2oz Copper PCBIntel 802.11ac WiFiASRock Ultra M.2 (PCIe Gen3 x4)ASRock Full Spike Protection (for all USB, Audio, LAN Ports)ASRock Live Update & APP ShopBIOS:- 128MB AMI UEFI Legal BIOS with multilingual GUI support- Supports \"Plug and Play\"- ACPI 5.1 compliance wake up events- Supports jumperfree- SMBIOS 2.3 support- DRAM Voltage multi-adjustmentSoftware and UEFI:Software- ASRock A-Tuning- ASRock Polychrome SYNC- ASRock XFast LANUEFI- ASRock Full HD UEFI- ASRock Instant Flash- ASRock Easy RAID Installer* These utilities can be downloaded from ASRock Live Update & APP Shop.Support CD:- Drivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and ToolbarHardware Monitor:- Temperature Sensing: CPU, Chassis, Chassis/Water Pump Fans- Fan Tachometer: CPU, Chassis, Chassis/Water Pump Fans- Quiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, Chassis, Chassis/Water Pump Fans- Fan Multi-Speed Control: CPU, Chassis, Chassis/Water Pump Fans- CASE OPEN detection- Voltage monitoring: +12V, +5V, +3.3V, VcoreOS:- Microsoft Windows 10 64-bitCertifications:- FCC, CE- ErP/EuP ready (ErP/EuP ready power supply is required)PackagingPackage ContentsAccessories:- Quick Installation Guide, Support CD, I/O Shield- 2 x SATA Data Cables- 2 x ASRock Wi-Fi 2.4/5 GHz Antennas- 1 x Screw for M.2 SocketShippingEnjoy fast and reliable shipping. Order will be shipped within 24 hours or one business day after the payment is cleared, Order placed on the weekends/holidays will be shipped the following business day.PaymentsWith Managed Payments, we accept most major credit cards, debit cards, Apple pay, Google pay, Paypal, and other locally accepted forms of payment.ReturnReturns for exchange or refund will be allowed within 30 days from the date of receipt (Returns are subject to restocking fees of 15% - 30%). All returns need to be returned in its original condition.