NOTES FROM THE SELLER 

ITEM CONDITION:

OPEN BOX / NO RETAIL BOX / TINY SCRATCH. 100% FUNCTIONAL, 30 DAY NO HASSLE RETURNS.  
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SHIPPING:
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MANUFACTURE ITEM DETAILS:

Model

Brand	ASUS
Model	PRIME B550M-A/CSM

Supported CPU

CPU Socket Type	AM4
CPU Type	BIOS update might require for AMD Zen 3 Ryzen 5000 series CPU. Refer to ASUS website for CPU support list.

Chipsets

Chipset	AMD B550

Memory

Number of Memory Slots	4x288pin (DDR4)
Memory Standard	3rd Gen AMD Ryzen Processors DDR4 4600(O.C)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory * 3rd Gen AMD Ryzen with Radeon Graphics Processors DDR4 4800(O.C.)/ 4600(O.C)/ 4466(O.C.)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory * * Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).
Maximum Memory Supported	128GB
Channel Supported	Dual Channel

Expansion Slots

PCI Express 4.0 x16	3rd Gen AMD Ryzen Processors 1 x PCIe 4.0 x16 (x16 mode) 3rd Gen AMD Ryzen with Radeon Graphics Processors 1 x PCIe 3.0 x16 (x16 mode)
PCI Express x1	AMD B550 Chipset 2 x PCIe 3.0 x1 slots * Support PCIe bifurcation for RAID on CPU function.

Storage Devices

SATA 6Gb/s	4 x SATA 6Gb/s
M.2	3rd Gen AMD Ryzen Processors: 1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280/22110 (PCIE 4.0 x4 and SATA modes) storage devices support 3rd Gen AMD Ryzen with Radeon Graphics Processors: 1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280/22110 (PCIE 3.0 x4 and SATA modes) storage devices support AMD B550 Chipset: 1 x M.2_2 socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support
SATA RAID	0/1/10

Onboard Video

Onboard Video Chipset	Supported only by CPU with integrated graphic: 1 x D-Sub 1 x DVI-D 1 x HDMI 2.1 (4K@60HZ)

Onboard Audio

Audio Chipset	Realtek ALC887
Audio Channels	7.1 Channels * A chassis with an HD audio module in the front panel is required to support 7.1-channel audio output.

Onboard LAN

LAN Chipset	Realtek RTL8111H
Max LAN Speed	1Gbps

Rear Panel Ports

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 Realtek RTL8111H 1Gb Ethernet port 3 x Audio jacks 1 x PS/2 Keyboard/Mouse combo port

Internal I/O Connectors

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	1 x CPU Fan connector(s) 1 x CPU OPT Fan connector(s) 2 x Chassis Fan connector(s) 2 x Aura RGB Strip Headers 1 x Addressable Gen 2 header(s) 1 x SPI TPM header 1 x S/PDIF out header(s) 1 x Front panel audio connector(s) (AAFP) 1 x Clear CMOS jumper(s) 1 x System panel connector 1 x COM port header 1 x Speaker connector

Physical Spec

Form Factor	Micro ATX
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

Windows 11 Compatibility

Windows 11	Supported

Features

Features

Software Features: ASUS Exclusive Software Armoury Crate - Aura Creator - Aura Sync AI Suite 3 - Performance And Power Saving Utility TurboV EVO EPU Digi+ VRM Fan Xpert 2+ - EZ update ASUS CPU-Z AI Charger DAEMON Tools Norton Anti-virus software (Free Trial for 60 days) WinRAR UEFI BIOS ASUS EZ DIY - ASUS CrashFree BIOS 3 - ASUS EZ Flash 3 - ASUS UEFI BIOS EZ Mode ASUS Special Features: ASUS 5X PROTECTION III - ASUS DIGI+ VRM - ASUS LANGuard - ASUS Overvoltage Protection - ASUS SafeSlot Core - ASUS Stainless-Steel Back I/O ASUS Q-Design - ASUS Q-DIMM - ASUS Q-Slot ASUS Thermal Solution - Aluminum heatsink design AURA Sync - Standard RGB headers - Addressable Gen 2 RGB header ASUS Lighting Control BIOS: 256MB Flash ROM, UEFI AMI BIOS Manageability: WOL by PXE Operating System: Windows 10 64-bit

Packaging

Package Contents	Accessories: 1 x ACC Express Activation Key Card I/O Shield 2 x SATA 6Gb/s cable(s) 1 x Supporting DVD User manual 1 x M.2 SSD screw package(s)

AMD B550 (Ryzen AM4) micro ATX motherboard with dual M.2, PCIe 4.0, 1 Gb Ethernet, HDMI/D-Sub/DVI, SATA 6 Gbps, USB 3.2 Gen 2 Type-A, and Aura Sync RGB headers support

• AMD AM4 socket: Ready for 3rd Gen AMD Ryzen™ Processors
• Comprehensive cooling: VRM heatsink, PCH heatsink, and Fan Xpert 2+
• Ultrafast connectivity: Dual M.2, PCIe 4.0, 1 Gb Ethernet, USB 3.2 Gen 2 Type-A