ASUS PRIME B450M-A II mATX

Model
Brand ASUS
Model Prime B450M-A II

Supported CPU
CPU Socket Type AM4
CPU Type AMD AM4 Socket for 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
ChipsetsChipset AMD B450

Memory
Number of Memory Slots 4x288pin (DDR4)
Memory Standard 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 *
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.
Maximum Memory Supported 128GB
Channel Supported Dual Channel

Expansion Slots
PCI Express 3.0 x16 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)
PCI Express x16 None
PCI Express x1 2 x PCI Express 2.0 x1 slots
Storage DevicesSATA 6Gb/s 6 x SATA 6Gb/s
M.2 3rd/2nd/1st Gen AMD Ryzen / 2nd and 1st Gen AMD Ryzen with Radeon Vega Graphics: *
1 x M.2 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x4 mode)
Athlon with Radeon Vega Graphics Processors: *
1 x M.2 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA mode)

* The M.2 slot shares bandwidth with the SATA6G_5/6 ports, and therefore the SATA6G_5/6 ports cannot be used when an M.2 device is installed.
SATA RAID 0/1/10
Onboard VideoOnboard Video Chipset 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.

Onboard Audio
Audio Chipset Realtek High Definition Audio CODEC
Audio Channels 7.1 Channels
Onboard LANLAN Chipset Realtek RTL8111H
Max LAN Speed 1Gbps
Rear Panel PortsBack I/O Ports 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)
HDMI 1 x HDMI
USB 3.0 3 x USB 3.0

Internal I/O Connectors
Onboard USB 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)
Other Connectors 1 x CPU Fan connector(s) (1 x 4-pin)
2 x Chassis Fan connector(s) (2 x 4-pin)
1 x SPI TPM header
1 x COM port(s) connector(s)
1 x S/PDIF out header(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

Physical Spec
Form Factor Micro ATX
LED Lighting RGB
Dimensions (W x L) 9.6″ x 9.5″
Power Pin 1 x 24-pin EATX Power connector(s)
1 x 8-pin ATX 12V Power connector(s)