PRIME B550M-A WIFI II AMD B550 (Ryzen AM4) micro ATX motherboard with dual M.2, PCIe 4.0, Wi-Fi 6, 1 Gb Ethernet, HDMI, DVI-D, D-Sub, SATA 6 Gbps, USB 3.2 Gen 2 Type-A, and Aura Sync RGB lighting support AMD AM4 Socket: Ready for Ryzen™ 5000 Series 5000 G-Series 4000 G-Series 3000 Series Desktop Processors Comprehensive Cooling: VRM heatsink, PCH heatsink, hybrid fan headers, and Fan Xpert 2+ utility Ultrafast Connectivity: Dual M.2, PCIe 4.0, Wi-Fi 6, 1 Gb Ethernet, USB 3.2 Gen 2 Type-A support Aura Sync RGB Lighting: Onboard addressable Gen 2 header and RGB headers for RGB LED strips, easily synced with Aura Sync-capable hardware CPU AMD Ryzen™ 5000 Series 5000 G-Series 4000 G-Series 3000 Series Desktop Processors*Refer to www.asus.com for CPU support list. Chipset AMD B550 Chipset Memory 4 x DIMM, Max. 128GB, DDR44866(OC) 4800(OC) 4600(OC) 4466(OC) 4400(OC) 4333(OC) 4266(OC) 4200(OC) 4133(OC) 4000(OC) 3866(OC) 3733(OC) 3600(OC) 3466(OC) 3400(OC) 3333(OC) 3200 3000 2933 2800 2666 2400 2133, Un-buffered Memory*Dual Channel Memory Architecture* ECC memory (ECC mode) support varies by CPU.* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists), and memory frequency support depends on the CPU types. Graphics 1 x D-Sub port1 x DVI-D port1 x HDMI port*** Graphics specifications may vary between CPU types.** Supports 4K@60Hz as specified in HDMI 2.1. Expansion Slots AMD Ryzen™ 5000 Series 3000 Series Desktop Processors1 x PCIe 4.0 x16 slot (supports x16 mode)AMD Ryzen™ 5000 G-Series 4000 G-Series Desktop Processors 1 x PCIe 3.0 x16 slot (supports x16 mode)AMD B550 Chipset2 x PCIe 3.0 x1 slots Storage AMD Ryzen™ 5000 Series 3000 Series Desktop ProcessorsM.2_1 slot (Key M), type 2242 2260 2280 22110 (supports PCIe 4.0 x4 & SATA modes)AMD Ryzen™ 4000 G-Series Desktop ProcessorsM.2_1 slot (Key M), type 2242 2260 2280 22110 (supports PCIe 3.0 x4 & SATA modes)AMD B550 ChipsetM.2_2 slot (Key M), type 2242 2260 2280 (supports PCIe 3.0 x4 & SATA modes)4 x SATA 6Gb s portsSupport RAID 0, 1, 10 Ethernet 1 x Realtek 1Gb EthernetASUS LANGuard Wireless & Bluetooth 2x2 Wi-Fi 6 (802.11 a b g n ac ax) + BT5.2Wi-Fi 62x2 Wi-Fi 6 (802.11 a b g n ac ax)Supports 2.4 5GHz frequency bandBluetooth v5.2 USB Rear USB:Total 6 ports2 x USB 3.2 Gen 2 ports (2 x Type-A)4 x USB 3.2 Gen 1 ports (4 x Type-A)Front USB:Total 6 ports1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports2 x USB 2.0 headers support additional 4 USB 2.0 ports Audio Realtek 7.1 Surround Sound High Definition Audio CODEC*- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking- Supports up to 24-Bit 192 kHz playbackAudio Features- Audio Shielding- LED-illuminated audio trace path design- Premium audio capacitors- Dedicated audio PCB layers* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output. Back Panel I O Ports 2 x USB 3.2 Gen 2 ports (2 x Type-A)4 x USB 3.2 Gen 1 ports (4 x Type-A)1 x D-Sub port1 x DVI-D port1 x HDMI port1 x Wi-Fi Module1 x Realtek 1Gb Ethernet port3 x Audio jacks1 x PS 2 Keyboard Mouse combo port Internal I O Connectors Fan and Cooling related1 x 4-pin CPU Fan header1 x 4-pin CPU OPT Fan header2 x 4-pin Chassis Fan headersPower related1 x 24-pin Main Power connector1 x 8-pin +12V Power connectorStorage related2 x M.2 slots (Key M)4 x SATA 6Gb s portsUSB1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports2 x USB 2.0 headers support additional 4 USB 2.0 portsMiscellaneous1 x Addressable Gen 2 header2 x AURA RGB headers1 x Clear CMOS header1 x COM Port header1 x Front Panel Audio header (AAFP)1 x S PDIF Out header1 x Speaker header1 x SPI TPM header (14-1pin)1 x 10-1 pin System Panel header Special Features ASUS 5X PROTECTION III- DIGI+ VRM- LANGuard- Overvoltage Protection- SafeSlot Core- Stainless-Steel Back I OASUS Q-Design- Q-DIMM- Q-SlotASUS Thermal Solution- VRM heatsink designAURA Sync- AURA RGB headers- Addressable Gen 2 header Software Features ASUS Exclusive SoftwareArmoury Crate- AURA Creator- AURA SyncAI Suite 3- Performance and Power Saving UtilityTurboV EVOEPUDIGI+ VRMFan Xpert 2+- EZ update- Lighting ControlASUS CPU-ZAI ChargerDAEMON ToolsMyASUS Norton Anti-virus software (Free Trial version)WinRARUEFI BIOSASUS EZ DIY- ASUS CrashFree BIOS 3- ASUS EZ Flash 3- ASUS UEFI BIOS EZ Mode BIOS 256 Mb Flash ROM, UEFI AMI BIOS Manageability WOL by PME, PXE Accessories Cables2 x SATA 6Gb s cablesMiscellaneous1 x ASUS Wi-Fi moving antennas1 x I O Shield1 x M.2 SSD screw packageInstallation Media1 x Support DVDDocumentation1 x User manual Operating System Windows 11 64-bit, Windows 10 64-bit Form Factor microATX24.4cm x 24.4cm