3 Best B450M Motherboards Under $300 (2026)

Compact AM4 builds demand careful attention to rear I/O connectivity and memory topology. These three Micro-ATX boards handle Ryzen 5 chips under $150 while differing sharply in VRM cooling and integrated wireless.

Best for someone building a compact AMD Ryzen gaming desktop who needs built-in Wi-Fi, a rear USB-C port, and solid performance without breaking a $300 budget.

Picked by QuickPick's AI from current retailer listings · Last reviewed September 8, 2026

1. Gigabyte B450M DS3H WIFI

$90

Estimated Starting Price

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This budget-friendly option fits your compact case and includes built-in wireless connectivity, though it omits a rear USB-C port.

Key Features

Built-in Wi-Fi and Bluetooth module
Compact Micro-ATX form factor
Dual-channel DDR4 memory support

Full Description

The Gigabyte B450M DS3H WIFI is a budget-friendly micro-ATX motherboard designed to support AMD AM4 socket processors, including Ryzen 1st, 2nd, 3rd, and 5th generation CPUs. It features a compact form factor that fits well in smaller PC chassis while still offering essential expansion capabilities for everyday gaming and productivity builds. Equipped with built-in 802.11ac Wi-Fi and Bluetooth 4.2, it provides convenient wireless connectivity out of the box without requiring extra adapter cards. The board includes support for dual-channel DDR4 memory up to 3600MHz (O.C.) and features an NVMe PCIe Gen3 x4 M.2 slot for fast storage solutions. While its power delivery system is basic and lacks heavy VRM cooling, it remains a popular choice for cost-conscious builders looking for reliable performance on an older platform.

Comparison Table

Attribute	Gigabyte B450M DS3H WIFI	Asus TUF Gaming B450M-PRO II	MSI B450M MORTAR MAX
Price in USD	90	120	130
User Rating out of 5	4.3	4.6	4.7
Built-in Wi-Fi and Bluetooth	Yes	No	No
Rear USB-C Port	No	Yes	Yes
Build Quality and Components	Standard budget components	Military-grade TUF components	Premium enthusiast-grade components
Cooling and VRM Design	Adequate for standard workloads	Optimized cooling and VRM design	Extended heatsink design

3. MSI B450M MORTAR MAX

$130

Estimated Starting Price

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This motherboard provides exceptional build quality and a rear USB-C port, though like the previous option, it requires a separate Wi-Fi card.

Key Features

Extended heatsink design for cooling
Rear USB 3.2 Gen 2 Type-C connectivity
Audio Boost for immersive sound

Full Description

The MSI B450M MORTAR MAX is a micro-ATX motherboard designed for AMD AM4 socket processors, supporting 1st, 2nd, and 3rd Gen Ryzen, as well as Ryzen with Radeon Vega Graphics. It bridges the gap between budget constraints and high-end performance by offering a robust power delivery system and comprehensive cooling options. The 'MAX' designation specifically highlights the upgraded BIOS chip size, ensuring full support for modern Ryzen 3000 series processors out of the box with the appealing graphical Click BIOS G. The board features an extended heatsink design and Pin Header Keep Out Zone to maintain stability under heavy loads. With its military-style aesthetic and steel-armored PCIe slots, it targets gamers and PC builders looking for a reliable, feature-rich foundation for a compact system.

Additional Features

Supports 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
Extended Heatsink Design with additional choke thermal padding rated for 7W/mk
Turbo M.2 with PCI-E Gen3 x4 performance maximizing NVMe SSD speeds
PCIe Steel Armor protecting VGA cards against bending and EMI
Audio Boost with studio grade sound quality for immersive gaming experiences
Flash BIOS Button allowing users to simply flash any BIOS within seconds without a CPU or memory
DDR4 Boost technology providing pure data signals for the best gaming and stability
Core Boost technology combining optimized power layout and digital power design
Mystic Light and Mystic Light Sync allowing personalization of your PC with 16.8 million colors and 10 effects

3 Best B450M Motherboards Under $300 (2026)

1. Gigabyte B450M DS3H WIFI

Key Features

Full Description

Comparison Table

Additional Features

2. Asus TUF Gaming B450M-PRO II

Key Features

Full Description

Additional Features

3. MSI B450M MORTAR MAX

Key Features

Full Description

Additional Features

Summary

Which One to Pick and Why

Gigabyte B450M DS3H WIFI

Asus TUF Gaming B450M-PRO II

MSI B450M MORTAR MAX