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Black ATX motherboard with silver heatsinks and red accents

MSI

MSI B450 GAMING PLUS MAX AMD motherboard

SKU CH-3EZ5-26RW1

Socket AM4 board supports first- and second-generation Ryzen CPUs, dual-channel DDR4 up to 3466 MHz and 64 GB memory, with 7.1-channel audio and Gigabit LAN

  • CPU Socket TypeSocket AM4
  • CPU TypeAMD first- and second-generation Ryzen processors with AM4 p
  • ChipsetAMD B450
  • Memory StandardSupport dual-channel DDR4 1866/2133/2400/2666/2800/2933/3000
  • Maximum Memory Supported64GB
  • PCI Slots1 PCIe 3.0 x16 slot (PCI_E1) AMD first and second generation
  • Supports fast dual-channel DDR4 up to 3466 MHz for responsive multitasking
  • 64 GB maximum memory capacity handles heavy workloads and large datasets
  • PCIe 3.0 x16 slot delivers full bandwidth for modern graphics cards
  • Realtek ALC892 codec provides 7.1-channel high-definition audio
  • Realtek 8111H Gigabit LAN ensures stable wired network connectivity

AM4 Board for Ryzen Builds

This MSI B450 GAMING PLUS MAX motherboard fits the AMD AM4 socket and the B450 chipset. It supports first- and second-generation Ryzen CPUs plus Ryzen APUs with Radeon Vega graphics. The ATX layout provides standard mounting points for typical chassis.

Ideal for DDR4 Upgraders

Builders who need up to 64 GB of dual-channel DDR4 at speeds from 1866 to 3466 MHz will find the four slots useful. Users requiring PCIe 4.0 lanes, integrated Wi-Fi or more than one full-length PCIe 3.0 x16 slot should consider a different chipset.

Primary PCIe 3.0 x16 Slot

The board delivers a single PCIe 3.0 x16 slot running at x16 with first- and second-generation Ryzen and at x8 with Ryzen APUs. A second x16-sized slot operates at PCIe 2.0 x4. This lane split decides whether the board matches your graphics or add-in card plans.

Highlights

  • Supports fast dual-channel DDR4 up to 3466 MHz for responsive multitasking
  • 64 GB maximum memory capacity handles heavy workloads and large datasets
  • PCIe 3.0 x16 slot delivers full bandwidth for modern graphics cards
  • Realtek ALC892 codec provides 7.1-channel high-definition audio
  • Realtek 8111H Gigabit LAN ensures stable wired network connectivity

Specifications

BrandMSI
SeriesMSI B450 GAMING PLUS MAX
ModelMSI B450 GAMING PLUS MAX
CPU Socket TypeSocket AM4
CPU TypeAMD first- and second-generation Ryzen processors with AM4 pins, as well as Ryzen processors with Radeon Vega display chips
ChipsetAMD B450
Memory StandardSupport dual-channel DDR4 1866/2133/2400/2666/2800/2933/3000/3066/3200/3466MHz memory
Maximum Memory Supported64GB
PCI Slots1 PCIe 3.0 x16 slot (PCI_E1)
AMD first and second generation Ryzen processors support x16 speed
AMD Ryzen processor with Radeon Vega display chip supports x8 speed
1 PCIe 2.0 x16 slot (PCI_E4, supports x4 mode)
4 PCIe 2.0 x1 slots
SATA RAID1XM.2 interface, 6xSATA III interface
Audio ChipsetRealtek ALC892 decoding chip
7.1-Channel high-quality sound effects
LAN Chipset1 Realtek 8111H Gigabit network interface card
Onboard USBAMD B450 Chipset
2 USB 3.1 Gen2 (SuperSpeed USB 10Gbps) Type-A ports on the backplane
2 USB 3.1 Gen1 (SuperSpeed USB) interfaces are provided via the onboard USB 3.1 Gen1 interface
6 USB 2.0 (High-speed USB) ports (2 Type-A ports on the backplane, 4 ports provided via onboard USB 2.0 ports)
AMD CPU
2 USB 3.1 Gen1 (SuperSpeed USB) Type-A ports located on the backplane

Questions about this item

Does the B450 chipset limit the primary PCIe 3.0 x16 slot to x8 when a Ryzen processor with Radeon Vega graphics is installed?

Yes, the primary slot runs at x8 speed with a Ryzen processor that includes Radeon Vega graphics, while first- and second-generation Ryzen CPUs without integrated graphics use the full x16 bandwidth.

What physical clearance does the board require for the ATX I/O shield and mounting holes?

The board uses a standard ATX I/O shield and nine mounting holes that align with any ATX-compatible case; the shield is included in the package.

Which BIOS step is often missed when installing a first- or second-generation Ryzen CPU on this board?

After seating the CPU and cooler, you must update the BIOS to a version that supports the installed Ryzen generation before the system will post.

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