PRIME B550M-K/CSM

AMD AM4 Socket for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors *,* Refer to www.asus.com for CPU support list

AMD B550

4 x DIMM, Max. 128GB, DDR4 4866(O.C)/4800(O.C.)/4600(O.C)/4466(O.C.)/4400(O.C)/4333(O.C.)/4266(O.C.)/4200(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3400(O.C.)/3333(O.C.)/3200/3000/2933/2800/2666/2400/2133 MHz Un-buffered Memory *,* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists), and memory frequency support depends on the CPU types.,Dual Channel Memory Architecture,ECC Memory (ECC mode) support varies by CPU.

1 x HDMI 2.1(4K@60HZ),*Graphics specifications may vary between CPU types.

AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors,AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors,AMD B550 Chipset,2 x PCIe 3.0 x1,1 x PCIe 4.0 x16 (x16 mode),1 x PCIe 3.0 x16 (x16 mode)

AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors : ,AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors : ,1 x M.2_2 socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support,Total supports 2 x M.2 slot(s) and 4 x SATA 6Gb/s ports,AMD B550 Chipset : ,4 x SATA 6Gb/s port(s),,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,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,Support Raid 0, 1, 10

Realtek RTL8111H 1Gb Ethernet,ASUS LANGuard

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,- LED-illuminated design,- Audio Shielding,- Dedicated audio PCB layers,- Premium Japanese audio capacitors,Audio Feature :,* Choose the chassis with HD audio module in front panel to support 8-channel audio output.

4 x USB 2.0 port(s)(4 x Type-A),Front USB Port ( Total 6 ),Rear USB Port ( Total 6 ),2 x USB 3.2 Gen 2 port(s)(2 x Type-A),4 x USB 3.2 Gen 1 port(s)(4 x Type-A),2 x USB 3.2 Gen 1 port(s)(2 x Type-A)

ASUS Exclusive Software
Armoury Crate
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 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
ASUS Lighting Control

2 x USB 3.2 Gen 2 (teal blue) (2 x Type-A),4 x USB 3.2 Gen 1 (blue) Type-A,1 x DVI-D,1 x D-Sub,3 x Audio jack(s),1 x PS/2 keyboard/mouse combo port(s),1 x LAN (RJ45) port(s),1 x HDMI

1 x USB 3.2 Gen 1(up to 5Gbps) connector(s) support(s) additional 2 USB 3.2 Gen 1 port(s),1 x M.2 Socket 3 with M Key, type 2242/2260/2280 storage devices support (SATA mode & X4 PCIE mode),1 x Speaker connector,2 x Chassis Fan connector(s),1 x 8-pin EATX 12V Power connectors,1 x System panel connector,1 x CPU Fan connector(s),2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s),1 x M.2 Socket 3 with M Key, type 2242/2260/2280/22110 storage devices support (SATA mode & X4 PCIE mode),1 x SPI TPM header,4 x SATA 6Gb/s connector(s),1 x S/PDIF out header(s),1 x 24-pin EATX Power connector(s),1 x Front panel audio connector(s) (AAFP),1 x Clear CMOS jumper(s),1 x COM port header

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

256 Mb Flash ROM, UEFI AMI BIOS

WOL by PME, PXE

Windows® 10 64-bit

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