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Pro B550M-C/CSM
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Form Factor

mATX Form Factor,9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )
mATX Form Factor,9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )

Multi-GPU Support

Supports AMD CrossFireX™ Technology

CPU

AMD AM4 Socket for AMD Ryzen™ 5000 Series/ 4000 G-Series/ 3000 Series Desktop Processors *,* Refer to www.asus.com for CPU support list
Intel® Socket 1151for 9th / 8th Generation Core™ i7/Core™ i5/Core™ i3/Pentium®/Celeron® Processors

LAN

Realtek RTL8111H 1Gb Ethernet
Intel® I219V, 1 x Gigabit LAN Controller(s),ASUS LAN Guard

Manageability

WOL by PXE
WOL by PME, PXE

Software Features

ASUS Exclusive Software
IT Management software supported
- ASUS Control Center Express(ACCE)

Chipset

AMD B550
Intel® H370

Graphic

1 x HDMI 2.1(4K@60HZ),*Graphics specifications may vary between CPU types.
Multi-VGA output support : HDMI/DVI-D/D-Sub ports,- Supports D-sub with max. resolution 1920 x 1200 @ 60 Hz,- Supports HDMI 1.4b with max. resolution 4096 x 2160 @ 24 Hz / 2560 x 1600 @ 60 Hz,Integrated Graphics Processor- Intel® HD Graphics support,- Supports DVI-D with max. resolution 1920 x 1200 @ 60Hz,Supports Intel® InTru™ 3D, Quick Sync Video, Clear Video HD Technology, Insider™,Maximum shared memory of 1024 MB (for iGPU exclusively)

Memory

4 x DIMM, Max. 128GB, 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 *,AMD Ryzen™ 4000 G-Series Desktop Processors,4 x DIMM, Max. 128GB, 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 *,ECC Memory (ECC mode) support varies by CPU.,Dual Channel Memory Architecture,* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).
4 x DIMM, Max. 64GB, DDR4 2666/2400/2133 MHz Non-ECC, Un-buffered Memory *,** DDR4 2666MHz and higher memory modules will run at max. 2666MHz on Intel® 8th Gen. 6-core or higher processors.,* The maximum memory frequency supported varies by processor.,Dual Channel Memory Architecture,Supports Intel® Extreme Memory Profile (XMP),* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).

Note

*1 The PCIe x4 slot runs x2 mode when the PCI slot is occupied.
*1. *The M.2_1 socket shares SATA_2 port when use M.2 SATA mode device. Adjust BIOS settings to use a SATA device.

Storage

Total supports 2 x M.2 slot(s) and 4 x SATA 6Gb/s ports,AMD RyzenTM 4000 G-Series Processors : ,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,AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors : ,1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280 (PCIE 4.0 x4 and SATA modes) storage devices support,1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support,4 x SATA 6Gb/s port(s),,Support Raid 0, 1, 10
Intel® H370 Chipset : ,1 x M.2 Socket 3, , with M Key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 X2 mode)*1,1 x M.2 Socket 3, , with M key, type 2242/2260/2280 storage devices support (PCIE 3.0 x 4 mode),Intel® Optane™ Memory Ready,6 x SATA 6Gb/s port(s), gray,Support Raid 0, 1, 5, 10

Expansion Slots

1 x PCIe 4.0 x16 (x16 mode) *,AMD B550 Chipset,* Support PCIe bifurcation for RAID on CPU function.,AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors,1 x PCIe 3.0 x16 (x16 mode),1 x PCIe 3.0 x4 *1,1 x PCI
1 x PCIe 3.0/2.0 x16 (max at x4 mode),2 x PCIe 3.0/2.0 x1,1 x PCIe 3.0/2.0 x16 (x16 mode)

Internal I/O Ports

1 x M.2 with E key for Wi-Fi module,2 x USB 2.0 connector(s) support(s) additional 3 USB 2.0 port(s),1 x 8-pin EATX 12V Power connectors,1 x Speaker connector,2 x M.2 Socket 3 with M Key, type 2242/2260/2280 storage devices support (SATA mode & X4 PCIE mode),1 x LPC Debug header,1 x Chassis intrusion header,2 x USB 3.2 Gen 1(up to 5Gbps) connector(s) support(s) additional 4 USB 3.2 Gen 1 port(s),1 x COM port header,1 x Thunderbolt header(s),1 x LPT header,1 x SMBus header(s),4 x SATA 6Gb/s connector(s),1 x CPU Fan connector(s),2 x Chassis Fan connector(s),1 x 24-pin EATX Power connector(s),1 x Front panel audio connector(s) (AAFP),1 x System panel(s),1 x Clear CMOS jumper(s)
1 x M.2 Socket 3 with M Key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 X2 mode),1 x M.2 Socket 3 with M key, type 2242/2260/2280 storage devices support (PCIE 3.0 x 4 mode),1 x AIO_PUMP connector (1 x 4-pin),2 x Chassis Fan connector(s) (1 x 4-pin),1 x System panel(s) (Chassis intrusion header is inbuilt),1 x MONO out header,1 x COM port header,1 x CPU Fan connector(s) (1 x 4-pin),1 x USB 3.1 Gen 1(up to 5Gbps) connector(s) support(s) additional 2 USB 3.1 Gen 1 port(s) (19-pin),2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s),6 x SATA 6Gb/s connector(s),1 x S/PDIF out header(s),1 x 24-pin EATX Power connector(s),1 x 8-pin ATX 12V Power connector(s),1 x Front panel audio connector(s) (AAFP),1 x Clear CMOS jumper(s)

USB Ports

Rear USB Port ( Total 6 ),2 x USB 3.2 Gen 2 port(s)(1 x Type-A +1 x USB Type-C®),2 x USB 3.2 Gen 1 port(s)(2 x Type-A),2 x USB 2.0 port(s)(2 x Type-A),Front USB Port ( Total 7 ),4 x USB 3.2 Gen 1 port(s)(4 x Type-A),3 x USB 2.0 port(s)
Intel® H370 Chipset :,2 x USB 3.1 Gen 2 up to 10Gbps port(s) (2 at back panel, teal blue, Type-A),5 x USB 3.1 Gen 1 up to 5Gbps port(s) (3 at back panel, , Type-A + USB Type-CTM, 2 at mid-board),6 x USB 2.0 port(s) (2 at back panel, , 4 at mid-board)

Accessories

3 x M.2 SSD screw package(s),2 x M.2 SSD Hex screw packages,1 x ACC Express Activation Key Card,User manual,1 x Supporting DVD,I/O Shield,2 x SATA 6Gb/s cable(s)
2 x M.2 screws,1 x SCD,User´s manual,I/O Shield,2 x SATA 6Gb/s cable(s)

Audio

Realtek ALC887/8977.1 Surround Sound High Definition Audio CODEC *,- Supports : Jack-detection, Multi-streaming, Front Panel Jack-retasking, up to 24-Bit/192kHz playback,* Choose the chassis with HD audio module in front panel to support 8-channel audio output.
Realtek® ALC8878-Channel High Definition Audio CODEC,- Premium Japanese audio capacitors: Provide warm, natural and immersive sound with exceptional clarity and fidelity,- Audio Shielding: Ensures precision analog/digital separation and greatly reduced multi-lateral interference,- Dedicated audio PCB layers: Separate layers for left and right channels to guard the quality of the sensitive audio signals,- Supports : Jack-detection, Front Panel Jack-retasking,Audio Feature :

Back I/O Ports

1 x Realtek® RTL8111H,2 x USB 3.2 Gen 2 (1 x Type-A+1 x USB Type-C®),2 x USB 3.2 Gen 1 Type-A,2 x DisplayPort,2 x USB 2.0,3 x Audio jack(s),1 x PS/2 keyboard (purple),1 x PS/2 mouse (green),1 x HDMI
2 x USB 3.1 Gen 2 (teal blue)up to 10Gbps,3 x USB 3.1 Gen 1 (blue) Type-A + USB Type-CTM,2 x USB 2.0,3 x Audio jack(s),1 x PS/2 keyboard/mouse combo port(s),1 x DVI-D,1 x D-Sub,1 x HDMI,1 x LAN (RJ45) port(s)

Operating System

Windows® 10 64-bit
Windows® 10 64-bit

ASUS Special Features

ASUS Q-Design
- ASUS Q-DIMM
- ASUS Q-Slot
ASUS Thermal Solution
- Aluminum heatsink design
ASUS EZ DIY
- Box Headers
Bespoke Motherboard Design & Business Focused Features
- ASUS Self Recovering BIOS
- ASUS Event Log
- ASUS Commercial BIOS kit
- Anti-Moisture
- 24/7 Reliability
- Overcurrent Protection
TPM2.0 IC Onboard

BIOS

256 Mb Flash ROM, UEFI AMI BIOS
128 Mb Flash ROM, UEFI AMI BIOS, PnP, SM BIOS 3.1, ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, CrashFree BIOS 3, F11 EZ Tuning Wizard, F6 Qfan Control, F3 My Favorites, Last Modified log, F9 Search, F12 PrintScreen, and ASUS DRAM SPD (Serial Presence Detect) memory information

Special Features

ASUS 5X Protection III :
- ASUS SafeSlot Core: Fortified PCIe Slot prevents damage,- ASUS LANGuard: Protects against LAN surges, lightning strikes and static-electricity discharges!,- ASUS Overvoltage Protection: World-class circuit-protecting power design,- ASUS Stainless-Steel Back I/O: 3X corrosion-resistance for greater durability!,- ASUS DIGI+ VRM: 6 Phase digital power design,- File Transfer,- ASUS Fan Xpert 4 Core,M.2 Onboard(The latest transfer technologies with up to 32Gb/s data transfer speeds),- PC Cleaner,- ASUS EZ Flash 3,- ASUS UEFI BIOS EZ Mode,- AI Suite 3,- Ai Charger,- Stylish Fanless Design Heat-sink solution & MOS Heatsink,ASUS EPU :,- EPU,ASUS Exclusive Features :,ASUS Quiet Thermal Solution :,ASUS EZ DIY :,- ASUS CrashFree BIOS 3,ASUS Q-Design :,- ASUS Q-Slot,- ASUS Q-DIMM

Support Disc

Drivers
ASUS Utilities
ASUS EZ Update
Anti-virus software (OEM version)
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