MSI Factory refurbished unit, 120 days MSI warranty, comes with SATA cable, and I/O shield only.

Model
BrandMSI
SeriesPRO
ModelB450-A PRO MAX
Supported CPU
CPU Socket Type AM4
CPU TypeSupports 1st, 2nd and 3rd Gen AMD Ryzen / Ryzen with Radeon Vega Graphics / 2nd Gen AMD Ryzen with Radeon Graphics / Athlon with Radeon Vega Graphics Desktop Processors for Socket AM4
Chipsets
Chipset AMD B450
Memory
Number of Memory Slots4x288pin (DDR4)
Memory StandardFor AMD Ryzen Gen3 (R5/R7/R9):
Supports DDR4 4133/ 4000/ 3866/ 3733/ 3466/ 3200/ 3066/ 3000/ 2933/ 2800/ 2667 MHz (by A-XMP OC MODE)
For AMD Other CPU:
Supports DDR4 3466/ 3200/ 3066/ 3000/ 2933/ 2800/ 2667 MHz (by A-XMP OC MODE)
Supports DDR4 2667/ 2400/ 2133/ 1866 MHz (by JEDEC)
Maximum Memory Supported64GB
Channel Supported Dual Channel
Expansion Slots
PCI Express 3.0 x16 1 x PCIe 3.0 x16 slot (PCI_E1)
- 1st, 2nd and 3rd Gen AMD Ryzen support x16 mode
- Ryzen with Radeon Vega Graphics and 2nd Gen AMD Ryzen with Radeon Graphics support x8 mode
- Athlon with Radeon Vega Graphics support x4 mode
PCI Express 2.0 x161 x PCIe 2.0 x16 slot (PCI_E4, supports x4 mode)*
* PCI_E4 will run x1 speed when installing devices in PCI_E2/PCI_E3/PCI_E5 slot.
PCI Express x14 x PCIe 2.0 x1 slots*
* PCI_E4 will run x1 speed when installing devices in PCI_E2/PCI_E3/PCI_E5 slot.
Storage Devices
SATA 6Gb/s AMD B450 Chipset
4 x SATA 6Gb/s ports

AMD CPU
2 x SATA 6Gb/s ports*
* SATA5 and SATA6 ports will be unavailable when installing a M.2 device in M.2 slot.
M.21 x M.2 slot (Key M)*
Supports PCIe 3.0 x4 (1st, 2nd and 3rd Gen AMD Ryzen / Ryzen with Radeon Vega Graphics and 2nd Gen AMD Ryzen with Radeon Graphics) or PCIe 3.0 x2 (Athlon with Radeon Vega Graphics) and SATA 6Gb/s standards 2242/2260/2280/22110 storage device

* SATA5 and SATA6 ports will be unavailable when installing a M.2 device in M.2 slot.
SATA RAID0/1/10
Onboard Video
Onboard Video Chipset Supported only by CPU with integrated graphic:
1 x VGA port, support a maximum resolution of 2048x1280@60Hz,1920x1200@60Hz
1 x DVI-D port, support a maximum resolution of 1920x1200@60Hz
1 x HDMI 1.4 port, supports a maximum resolution of 4096x2160@30Hz, 2560x1600@60Hz

Only support when using Ryzen with Radeon Vega Graphics and 2nd Gen AMD Ryzen with Radeon Graphics / Athlon with Radeon Vega Graphics processors
Maximum shared memory of 2048MB
Onboard Audio
Audio Chipset Realtek ALC892
Audio Channels 7.1 Channels
Onboard LAN
LAN ChipsetRealtek 8111H
Max LAN Speed1Gbps
Rear Panel Ports
Back I/O Ports1 x D-Sub / 1 x DVI-D / 1 x HDMI / 1 x LAN (RJ45) / 1 x PS/2 Keyboard/Mouse Combo / 2 x USB 2.0/1.1 / 2 x USB 3.2 Gen 1 / 2 x USB 3.2 Gen 2 / 6 x Audio Jacks
Internal I/O Connectors
Onboard USB2 x USB 2.0 connectors (support additional 4 USB 2.0 ports)
1 x USB 3.2 Gen1 connectors (support additional 2 USB 3.2 Gen1 ports)
Other Connectors1 x 4-pin CPU fan connector
1 x 4-pin water-pump-fan connector
4 x 4-pin system fan connectors
1 x TPM module connector
1 x Front panel audio connector
2 x System panel connectors
1 x Serial port connector
1 x Parallel port connector
1 x Chassis Intrusion connector
1 x Clear CMOS jumper
1 x 5050 RGB LED strip 12V connector
Physical Spec
Form FactorATX
LED LightingRGB
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24-pin ATX main power connector
1 x 8-pin ATX 12V power connector
Windows 11 Compatibility
Windows 11Supported
Features
FeaturesSupports 1st, 2nd and 3rd Gen AMD Ryzen / Ryzen with Radeon Vega Graphics and 2nd Gen AMD Ryzen with Radeon Graphics / Athlon with Radeon Vega Graphics Desktop Processors for Socket AM4

Supports DDR4 Memory, up to 4133(OC) MHz

Turbo M.2: Running at PCI-E Gen3 x4 maximizes performance for NVMe based SSDs

DDR4 Boost: Fully isolated, shielded and optimized DDR4 PCB design to give your DDR4 memory a performance boost

Audio Boost: Reward your ears with studio grade sound quality

Flash BIOS Button: Simply use a USB key to flash any BIOS within seconds, without installing a CPU, memory or graphics card

Core Boost: With premium layout and fully digital power design to support more cores and provide better performance

Multi-GPU: With Steel armor PCI-E slots. Supports 2-Way AMD Crossfire

AMD Turbo USB 3.2 Gen2: Powered by AMD USB 3.2 Gen2 controller, Turbo USB ensures an uninterrupted connection with more stability and fastest USB speeds