ASUS factory refurbished unit, comes with SATA cable, I/O shield, M.2 screws, M.2 standoff only, repacked with ASUS service white or brown box.

Model
BrandASUS
SeriesROG
ModelSTRIX B550-A GAMING
Supported CPU
CPU Socket Type AM4
CPU TypeSupports AMD Ryzen 5000 Series / 4000 G-Series / 3000 Series Processors

* Refer to www.asus.com for CPU support list.
* BIOS update might require for AMD Zen 3 Ryzen 5000 series CPU.
Chipsets
Chipset AMD B550
Memory
Number of Memory Slots4x288pin (DDR4)
Memory StandardDDR4 5100(OC) / 4800(OC) / 4600(OC) / 4400(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3600(OC) / 3466(OC) / 3200 / 3000 / 2800 / 2666 / 2400 / 2133 (AMD Ryzen 4000 G-Series Processors)

DDR4 4600(OC) / 4400(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3600(OC) / 3466(OC) / 3200 / 3000 / 2800 / 2666 / 2400 / 2133
Maximum Memory Supported128GB
Channel Supported Dual Channel
ECC SupportedECC Memory (ECC mode) support varies by CPU.
Buffer SupportedUn-buffered
Expansion Slots
PCI Express 4.0 x161 x PCI Express 4.0 x16*

* Actual support may vary by CPU.
PCI Express 3.0 x16 1 x PCIe 3.0 x16*

* Supports x4 mode.
* PCIEX16_2 shares bandwidth with PCIE x1_1, PCIE x1_2, and PCIE x1_3.
PCI Express x13 x PCIe 3.0 x1
Storage Devices
SATA 6Gb/s 6 x SATA 6Gb/s
M.23rd Gen AMD Ryzen Processors:
1 x M.2_1 socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIe 4.0 x4 mode)

AMD B550 Chipset:
1 x M.2_2 socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x4 mode)*

* When the M.2_2 Socket 3 is populated, SATA6G_5/6 ports will be disabled.
SATA RAID0/1/10
Onboard Video
Onboard Video Chipset Supported only by CPU with integrated graphic
Onboard Audio
Audio Chipset ROG SupremeFX High Definition Audio CODEC S1220A
Audio Channels 8 Channels*

* Due to limitations in HDA bandwidth, 32-Bit/192kHz is not supported for 8-Channel audio.
Onboard LAN
LAN ChipsetIntel I225-V
Max LAN Speed2.5Gbps
Rear Panel Ports
Back I/O Ports1 x Intel I225-V 2.5Gb Ethernet
1 x DisplayPort
1 x HDMI
2 x USB 3.2 Gen 2 (1 x Type-A+1 x USB Type-C)
4 x USB 3.2 Gen 1
2 x USB 2.0
1 x Optical S/PDIF out
1 x BIOS FlashBack Button(s)
5 x Gold-plated audio jacks
Internal I/O Connectors
Onboard USB1 x USB 3.2 Gen 1 (up to 5Gbps) connector(s) support(s) additional 2 USB 3.2 Gen 1 port(s)
2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s)
Other Connectors1 x CPU Fan connector(s)
1 x CPU OPT Fan connector(s)
3 x Chassis Fan connector(s)
1 x AIO_PUMP connector
1 x AAFP connector
2 x Aura RGB Strip Header(s)
1 x Addressable Gen 2 header(s)
1 x Thunderbolt header(s)
1 x System panel(s)
1 x Thermal sensor connector(s)
1 x Clear CMOS jumper(s)
Physical Spec
Form FactorATX
LED LightingRGB
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24-pin EATX Power connector(s)
1 x 8-pin ATX 12V Power connector(s)
1 x 4-pin ATX 12V Power connector(s)
Windows 11 Compatibility
Windows 11Supported
Features
FeaturesMulti-GPU Support:
Supports AMD 2-Way CrossFireX Technology

Software Features:
ROG Exclusive Software
- RAMCache III
- ROG CPU-Z
- GameFirst VI
- Sonic Studio III + Sonic Studio Virtual Mixer
- Sonic Radar III
- DTS Sound Unbound
- Overwolf
- Anti-virus software
ASUS Exclusive Software Features
Armoury Crate
- Aura Creator
- Aura Sync
- AI Noise Cancelling Microphone
AI Suite 3:
- PPSU
EPU
DIGI+ VRM
Fan Xpert 4
TurboV EVO
- EZ update
WinRAR
UEFI BIOS
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
- ASUS UEFI BIOS EZ Mode

ASUS Special Features:
Aura Sync
- Standard RGB header(s)
- Addressable Gen 2 RGB header(s)
ASUS Q-Design
- ASUS Q-DIMM
- ASUS Q-LED (DRAM [yellow], CPU [red], VGA [white], Boot Device [yellow green)
- ASUS Q-Slot
ASUS Thermal Solution
- Aluminum M.2 heatsink
ASUS EZ DIY
- BIOS FlashBack button
- BIOS FlashBack LED
- Clear CMOS header
- ProCool
- Pre-mounted I/O shield
- SafeSlot

BIOS:
256MB Flash ROM, UEFI AMI BIOS

Manageability:
WOL by PME, PXE

Operating System:
Windows 10 64-bit