MOTHER ASUS (AM4) PRIME B450M-A II CSM

AMD AM4 Socket for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3rd/2nd/1st Gen AMD Ryzen™/ 2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega Graphics Processors *
* Refer to www.asus.com for CPU support list

AMD B450

3rd/2nd/1st Gen AMD Ryzen™/ 2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega Graphics Processors
4 x DIMM, Max. 128GB, DDR4 4400(O.C)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3400(O.C.)/3300(O.C.)/3200(O.C.)/3000(O.C.)/2800(O.C.)/2666/2400/2133 MHz Un-buffered Memory *
Dual Channel Memory Architecture
ECC Memory (ECC mode) support varies by CPU.
* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).
* The maximum memory frequency supported varies by processor.

Integrated Graphics in the 2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega Graphics Processors *
1  x D-Sub
1  x DVI-D
1  x HDMI 2.0b
*Graphics specifications may vary between CPU types.

3rd/2nd/1st Gen AMD Ryzen™ Processors
1 x PCIe 3.0 x16 (x16 mode)
2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega Graphics Processors
1 x PCIe 3.0 x16 (x8 mode)
AMD Athlon™ with Radeon™ Vega Graphics Processors
1 x PCIe 3.0 x16 (x4 mode)
AMD B450 chipset
2 x PCIe 2.0 x1

Total supports 1 x M.2 slot(s) and 6 x SATA 6Gb/s ports
3rd/2nd/1st Gen AMD Ryzen™/ 2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega Graphics : *¹
1 x M.2 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)
Athlon™ with Radeon™ Vega Graphics Processors : *¹
1 x M.2 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA mode)
3rd/2nd/1st Gen AMD Ryzen™/ 2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega Graphics Processors :
2 x SATA 6Gb/s port(s),
Support Raid 0, 1, 10
AMD B450 chipset :
4 x SATA 6Gb/s port(s),
Support Raid 0, 1, 10

Realtek® RTL8111H
ASUS LANGuard

Realtek ALC887/897 7.1-Channel High Definition Audio CODEC *
– Supports : Jack-detection, Multi-streaming, Front Panel Jack-retasking, up to 24-Bit/192kHz playback
Audio Feature :
– LED-illuminated design
– Audio Shielding
– Dedicated audio PCB layers
– Premium Japanese audio capacitors
* Choose the chassis with HD audio module in front panel to support 8-channel audio output.

Rear USB Port ( Total 6  )
2 x USB 3.2 Gen 2 (up to 10Gbps) port(s)(2 x Type-A)
4 x USB 3.2 Gen 1 port(s)(4 x Type-A)
Front USB Port ( Total 6  )
2 x USB 3.2 Gen 1 port(s)
4 x USB 2.0 port(s)

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+
PC Cleaner
– EZ update
– System Information
ASUS CPU-Z
AI Charger
ASUS EZ Installer
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 EZ DIY
– BIOS FlashBack™ button
– BIOS FlashBack™ LED
AURA Sync
– AURA RGB header
ASUS Lighting Control

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)
2 x USB 3.2 Gen 2 (teal blue) (2 x Type-A)
4 x USB 3.2 Gen 1 (blue) Type-A
3 x Audio jack(s)
1 x BIOS FlashBack^™ Button(s)

1 x CPU Fan connector(s) (1 x 4 -pin)
2 x Chassis Fan connector(s) (2 x 4 -pin)
1 x USB 3.2 Gen 1(up to 5Gbps) connector(s) support(s) additional 2 USB 3.2 Gen 1 port(s) (19-pin)
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 & PCIE 3.0 x 4 mode)
1 x SPI TPM header
1 x COM port(s) connector(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 System panel(s)
1 x Clear CMOS jumper(s)
1 x COM port header
1 x Speaker connector
1 x RGB Header

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

256 Mb Flash ROM, UEFI AMI BIOS

Windows® 10 64-bit
Windows® 7 64-bit *²

mATX Form Factor
9.6  inch x 9.5  inch ( 24.4  cm x 24  cm )