Does it support Ryzen 5000 series out of the box?

OP is correct. This board will not support 5900 series, however some older series such as 5600 will run out of the box. Flashing the BIOS or using an older gen Ryzen to update it is needed to support.

Plug and play with ryzen 5000 series out of box?

I purchased this board and came with A20 bios not compatible with my 5600x updated bios and everything now works 🙂

What psu does this need?

PSU would depend on the CPU and Graphics card you have installed. Generally, 750-850w is the sweet spot to give you plenty of power headroom. depending on the Graphics card/CPU you have. Remember, Power is DRAWN not given from the PSU. That means if a product needs 100w and you have a 850u, it will only draw 100w. Graphics cards are what eat your PSU power, as they range from 150-350w alone. Fans and AIO coolers. are also included in your power consumption. so remember that. Always leave plenty of headroom. for upgrades or power spikes. ( Especially if you're lucky enough to have a RTX 30XX CARD)

how many fan headers are there

6 System Fan headers. 1xCPU 1xPump

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MAG B550 TOMAHAWK Motherboard ATX - Supports AMD Ryzen 3rd Gen Processors, AM4, DDR4 Boost (4866MHz/OC), 1 x PCIe 4.0 x16, 1 x PCIe 3.0 x16, 2 x M.2, HDMI, 2.5G LAN

MAG B550 TOMAHAWK Motherboard ATX - Supports AMD Ryzen 3rd Gen Processors, AM4, DDR4 Boost (4866MHz/OC), 1 x PCIe 4.0 x16, 1 x PCIe 3.0 x16, 2 x M.2, HDMI, 2.5G LAN

Product ID: 210884901

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Details

Brand
MSI
CPU socket
Socket AM4
Compatible devices
Personal
RAM memory technology
DDR4
Compatible processors
AMD Ryzen 3rd
Chipset type
AMD B550

⚡PCIe 4.0 x16 for ultra-fast GPU bandwidth

🌐2.5G LAN + Gigabit LAN for lag-free networking

💾Dual M.2 slots for blazing NVMe SSD speeds

Description

🔥 Power your Ryzen build with speed, style, and unstoppable connectivity!

CUSTOMIZABLE RGB VIBES - Mystic Light with 16.8M colors and 29 effects lets you personalize your rig’s lighting with a single click.
NEXT LEVEL SPEED POWER - Supports 3rd Gen AMD Ryzen CPUs with DDR4 up to 4866MHz OC for seamless multitasking and gaming dominance.
FUTURE PROOF CONNECTIVITY - Equipped with PCIe 4.0 and dual M.2 slots to handle the latest GPUs and ultra-fast storage without bottlenecks.
IMMERSIVE AUDIO EXPERIENCE - Audio Boost technology delivers studio-grade sound quality, making every game and call crystal clear.
ROBUST THERMAL BUILD DESIGN - Extended heatsinks, thick copper PCB, and pre-installed I/O shielding ensure stable performance under intense workloads.

The MSI MAG B550 TOMAHAWK is a high-performance ATX motherboard designed for 3rd Gen AMD Ryzen processors. It supports up to 128GB DDR4 RAM at 4866MHz (OC), features PCIe 4.0 x16 and dual M.2 slots for cutting-edge graphics and storage, and includes dual LAN ports (2.5G + Gigabit) for superior networking. Enhanced with Audio Boost, Mystic Light RGB control, and advanced thermal solutions, it’s engineered for gamers and professionals seeking reliability, speed, and customization.

Specifications

Brand	MSI
Product Dimensions	30.48 x 3.81 x 24.38 cm; 1.3 kg
Batteries	1 Lithium Ion batteries required.
Item model number	911-7C91-004
Manufacturer	MSI
Series	MAG B550 TOMAHAWK
Colour	Black
Form Factor	ATX
Processor Type	Ryzen 9
Processor Socket	Socket AM4
Memory Technology	DDR4
Computer Memory Type	DDR4 SDRAM
Maximum Memory Supported	128 GB
Memory Clock Speed	4866 MHz
Graphics Card Interface	PCI Express
Wireless Type	2.4 GHz Radio Frequency, 5 GHz Radio Frequency
Number of USB 2.0 Ports	2
Number of HDMI Ports	1
Number of Ethernet Ports	1
Wattage	3600 watts
Are Batteries Included	No
Lithium Battery Energy Content	2 Kilowatt Hours
Lithium Battery Packaging	Batteries packed with equipment
Lithium Battery Weight	2 Grams
Number Of Lithium Ion Cells	5
Number of Lithium Metal Cells	5
Item Weight	1.3 kg
Guaranteed software updates until	unknown

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