Does the motherboard actually come with Windows 11? If so what version like Home or Pro?

No motherboards DO NOT come with an operating system. I believe what you're seeing advertised is that this MOBO is windows 11 ready, meaning it is compatible with windows 11 which is not the case for all motherboards currently on the market.

What is the minimum wattage for the power supply for this mother board? I don't see it in the online specs

The rest of your build will most likely be the determiner for the PSU wattage.

Does this motherboard actually come with the Windows 11 OS ready? If so which one like the Home or Pro?

The motherboard is Windows 11 ready, but it does not specify whether it comes with Windows 11 Home or Pro.

The motherboard having WIFI antenna ports, does it serve as a modem or an "mesh extender"?

The motherboard has built-in WiFi 6 (802.11ax) capabilities and includes WiFi antenna ports, but it does not serve as a modem or a mesh extender.

GIGABYTE B550M GAMING X WIFI6 AM4 AMD B550 Micro ATX Motherboard

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ASUS Prime B550M-A WiFi II AMD AM4 (3rd Gen Ryzen) Micro ATX Motherboard (PCIe 4.0, WiFi 6, ECC Memory, 1Gb LAN, HDMI 2.1/D-Sub, 4K@60HZ, Addressable Gen 2 RGB Header and Aura Sync)

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Option: PRIME B550M-A WIFI II

PRIME B550-PLUS
PRIME B550M-A/CSM
PRIME B550M-K
ROG STRIX B550-E GAMING
ROG STRIX B550-F GAMING
ROG STRIX B550-F GAMING (WI-FI)
ROG STRIX B550-F GAMING WIFI II
ROG STRIX B550-I GAMING
TUF GAMING B550-PLUS
TUF GAMING B550M-PLUS
TUF GAMING B550M-PLUS (WI-FI)
TUF GAMING B550-PLUS WIFI II
PRIME B550-PLUS AC-HES
PRIME B550M-A WIFI II

AMD AM4 Socket and PCIe 4.0: The perfect pairing for 3rd Gen AMD Ryzen CPUs
Ultrafast Connectivity: 1x PCIe 4.0 x16 SafeSlot, WiFi 6 (802.11ax), 1Gb LAN, dual M.2 slots (NVMe SSD) - one with PCIe 4.0 x4 connectivity, USB 3.2 Gen 2 Type-A, HDMI 2.1 (4K@60HZ), D-Sub & DVI
Comprehensive Cooling: VRM heatsink, PCH heatsink, hybrid fan headers and Fan Xpert 2 utility
5X Protection III: all-round protection with LANGuard, DRAM overcurrent protection, overvoltage protection, SafeSlot Core safeguards and stainless-steel back I/O
Boosted Memory Performance: ASUS OptiMem proprietary trace layout allows memory kits to operate at higher frequencies with lower voltages to maximize system performance
Enhanced Power Solution: 8+1 DrMOS power stages with high-quality alloy chokes and durable capacitors to provide reliable power for the last AMD high-count-core CPUs
Aura Sync RGB: Synchronizable LED effects across a wide range of compatible PC gear, plus RGB LED and Addressable Gen 2 RGB headers

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

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Powered by 3rd Gen AMD® Ryzen processors, the ASUS Prime B550M-A WiFi II delivers next-generation speeds with PCIe 4.0, WiFi 6 and 1Gb LAN. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, the ASUS Prime B550M-A WiFi 6 provides mainstream PC users and DIY PC builders with a perfect all-around foundation via intuitive software and firmware features.

USB 3.0	10 x USB 3.0
HDMI	1 x HDMI

Number of Memory Slots	4x288pin (DDR4)
Memory Standard	DDR4 4866(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* * Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists), and memory frequency support depends on the CPU types.

PCI Express 3.0 x16	1 x PCI Express 3.0 x16
PCI Express 2.0 x16	1 x PCI Express 2.0 x16
PCI Express x16	1 x PCI Express x16

Maximum Memory Supported	128GB
Channel Supported	Dual Channel

Series	Prime
Part Number	90MB19X0-M0AAY0

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ECC Supported	ECC memory (ECC mode) support varies by CPU
Buffer Supported	Un-buffered
Memory Feature	DDR4, 2133 MHz, 4, 128 GB

PCI Express 4.0 x16	1 x PCI Express 4.0 x16* * Actual support may vary by CPU.
PCI Slots	1 x PCI Slot

M.2	AMD Ryzen 5000 Series/ 3000 Series Desktop Processors: M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 & SATA modes) AMD Ryzen 5000 G-Series/ 4000 G-Series Desktop Processors: M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes) AMD B550 Chipset: M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes)
SATA RAID	0/1/10

LAN Chipset	Realtek 1Gb Ethernet
Wireless LAN	Wi-Fi 6 802.11 a/b/g/n/ac/ax
Bluetooth	Bluetooth 5.2

Back 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 port 1 x DVI-D port 1 x HDMI port 1 x Wi-Fi Module 1 x Realtek 1Gb Ethernet port 3 x Audio jacks 1 x PS/2 Keyboard/Mouse combo port
PS/2	1
COM	3
Video Ports	1
RJ45	1 x RJ45
USB 3.1	2 x USB 3.1
USB 1.1/2.0	9 x USB 2.0
S/PDIF Out	1 x Optical, 1 x Coaxial
S/PDIF In	1 x Optical, 1 x Coaxial
Game/MIDI Ports	1
Audio Ports	6 Ports

Onboard USB	1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports 2 x USB 2.0 headers support additional 4 USB 2.0 ports
Other Connectors	Fan and Cooling related 1 x 4-pin CPU Fan header 1 x 4-pin CPU OPT Fan header 2 x 4-pin Chassis Fan headers Miscellaneous 1 x Addressable Gen 2 header 2 x AURA RGB headers 1 x Clear CMOS header 1 x COM Port header 1 x Front Panel Audio header (AAFP) 1 x S/PDIF Out header 1 x Speaker header 1 x SPI TPM header (14-1pin) 1 x 10-1 pin System Panel header

LED Lighting	RGB
Dimensions (W x L)	9.6" x 9.6"
Power Pin	1 x 24-pin Main Power connector 1 x 8-pin +12V Power connector

Software Feature
Software	windows_10
Windows 11	Ready

Item#: N82E16813119580

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ASUS Prime B550M-A WiFi II AMD AM4 (3rd Gen Ryzen) Micro ATX Motherboard (PCIe 4.0, WiFi 6, ECC Memory, 1Gb LAN, HDMI 2.1/D-Sub, 4K@60HZ, Addressable Gen 2 RGB Header and Aura Sync)

Learn more about the ASUS PRIME B550M-A WIFI II

Customer Reviews of the ASUS PRIME B550M-A WIFI II

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

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Manufacturer Contact Info