ASUS Prime B450-Plus AM4 ATX Motherboard: features, specs and who it suits

The ASUS Prime B450-Plus is an ATX motherboard built around AMD's AM4 socket. It is the part that every other component in a desktop PC plugs into, so it decides which processors, memory and storage you can use. ASUS aims it at people building or upgrading a Ryzen-based desktop who want current connections without a complicated setup.

What the AM4 socket and B450 chipset mean

The socket is the physical connector for the processor, and AM4 is the one used by AMD's Ryzen desktop chips of this era. ASUS says the board is powered by 2nd generation Ryzen processors. The listing names that generation specifically, so anyone planning to use a different Ryzen generation should look up the board's processor support list and BIOS version before buying. Boards of this age sometimes need a BIOS update before they recognise newer chips.

The B450 chipset sits in the middle of AMD's lineup for that platform. In general, chipsets of this class allow processor and memory tuning, which is why enthusiasts often choose them over the most basic options.

Memory, storage and ports

The board uses DDR4 memory, and ASUS lists support for speeds of 3200 MHz. DDR4 modules are not interchangeable with DDR3 or DDR5, so it matters that any memory you reuse is DDR4.

For storage, the Prime B450-Plus has an NVMe M.2 slot. NVMe drives connect over PCI Express rather than the older SATA interface, and they are typically several times faster in sequential transfers than a SATA drive. The listing also mentions USB 3.1 Gen2, which is rated at up to 10 Gbit/s, and Gigabit LAN for wired networking. Video outputs include HDMI and DVI, though these only work with a processor that has built-in graphics. Most Ryzen chips of this generation do not, so a separate graphics card is typically needed.

Protection and the reinforced slot

ASUS calls its set of electrical safeguards 5X Protection III and says it provides hardware-level protection for longevity and reliability. The listing also mentions the Safe Slot Core, a reinforced PCIe slot that ASUS says helps prevent damage from heavy graphics cards. Large cards are heavy, and a slot that is anchored more firmly can matter when you move a PC or transport it.

Cooling and lighting

FanXpert 4 Core is ASUS's fan control software. According to the brand, it manages case fans and all-in-one liquid cooler pumps, and it can use graphics card temperature readings to adjust fan behaviour. There is also an Aura Sync RGB header, which lets you connect compatible lighting and synchronise effects across Aura-enabled parts. If you prefer a plain build, the lighting header can simply stay unused.

Size and fit

The board is a standard ATX form factor. The listing gives the package size as 10.4 x 13.0 x 2.1 inches (about 26 x 33 x 5 cm), with a weight of 1.8 lb (about 0.8 kg). ATX boards fit mid-tower and full-tower cases, while many compact cases only take smaller formats, so check your case.

Who it suits

It suits someone assembling a new AM4 desktop, or replacing a board in an older Ryzen system. It also suits a builder who wants an NVMe drive, wired networking and modern USB without paying attention to a long list of extras.

What to check before you buy

• Processor support: confirm your exact processor and the BIOS version needed on the manufacturer's support page.
• Memory: make sure your modules are DDR4 and check the board's memory support list.
• Case size: confirm your case takes ATX boards.
• Graphics: check whether your processor has built-in graphics before relying on the HDMI or DVI ports.
• Wireless: the listing mentions Gigabit LAN only, so plan for a wireless adapter if you need Wi-Fi.
• Power connectors: confirm your power supply has the connectors the manual describes.

The short version

• An ATX motherboard for AMD AM4 processors, listed for 2nd generation Ryzen.
• DDR4 memory support up to 3200 MHz and an NVMe M.2 slot.
• USB 3.1 Gen2, Gigabit LAN, HDMI and DVI outputs.
• 5X Protection III, a reinforced PCIe slot and FanXpert 4 Core fan control.
• Aura Sync RGB header for compatible lighting.

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