ASUS PRIME B840M-R Motherboard - 90MB1PT0-M0EAY0

The ASUS PRIME B840M-R is a compact and reliable Micro-ATX motherboard designed for the AMD B840 c...

Best current price£87.98from Box.co.uk

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Box.co.ukAsus Black Prime B840m-R Amd B840 Micro-Atx Socket Am5 Motherboard
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£87.98
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Laptop OutletAsus Black Prime B840m-R Amd B840 Micro-Atx Socket Am5 Motherboard
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£87.98
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AWD-IT.co.ukAsus Prime B840m-R Micro Atx Motherboard Ddr5 Pcie 4.0 Amd Am5 - 90Mb1pt0-M0eay0
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£87.99
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eBayAsus PRIME B840M-R Socket Am5/B840/Ddr5/S-Ata 6Gb/S/Micro Atx
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£101.25
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Product Information

Full details

The ASUS PRIME B840M-R is a reliable Micro-ATX motherboard tailored for users seeking a stable and compact foundation for AMD AM5-based desktop builds. It is ideal for gamers and professionals utilizing AMD Ryzen 9000, 8000, and 7000 series processors, offering a balance of high-speed DDR5 memory support and essential storage expandability. While the Micro-ATX form factor saves significant desk space, potential users should note that the board is equipped with two memory slots, which may limit future RAM upgrades compared to full-sized ATX boards.

All features

Model Part Number90MB1PT0-M0EAY0
BrandAsus

Extended Product Information

FAQs

Does this motherboard support overclocking?

The PRIME series is generally focused on stability; while it supports standard performance profiles, check the specific BIOS options for the level of tuning available.

Can I use older AM4 processors with this board?

No, this board uses the AM5 socket and is only compatible with Ryzen 7000, 8000, and 9000 series processors.

What is the maximum RAM speed supported?

The board supports high-speed DDR5; please refer to the Qualified Vendor List (QVL) on the ASUS website for specific memory module compatibility and tested speeds.

Does this board have built-in Wi-Fi?

The base model specifications for the PRIME B840M-R rely on wired networking. Please check your specific box packaging if your variant includes an optional Wi-Fi module.

How many fans can I connect to this motherboard?

The board features multiple fan headers; please consult the user manual layout for the exact number and location of chassis and CPU fan headers.

Troubleshooting

System fails to POST or show display output

Ensure the RAM is fully seated in the slots and check that the monitor is connected to the motherboard's display output or the GPU if one is installed.

M.2 drive not detected in BIOS

Verify that the drive is properly installed in the M.2 slot and check the storage settings in the BIOS menu to ensure the interface is enabled.

No audio output

Confirm that the latest audio drivers are installed from the ASUS support page and that the correct playback device is selected in your operating system.

Pros and Cons

Pros

  • Supports the latest AMD Ryzen 7000, 8000, and 9000 processor series
  • High-speed DDR5 memory architecture for modern workflows
  • Compact Micro-ATX size is ideal for small form factor builds
  • Multiple storage interfaces including two M.2 slots

Cons

  • Limited to two RAM slots which restricts future memory expansion
  • Micro-ATX form factor offers fewer expansion slots than ATX alternatives
  • May require BIOS updates for newer generation processor compatibility

Setup, Compatibility & Care

To ensure optimal performance, verify that your power supply unit is properly connected to the motherboard's main power and CPU power headers. When installing memory, ensure the sticks are firmly seated in both slots to enable dual-channel performance. Regarding compatibility, always check the ASUS support website for the latest BIOS version, especially when installing a new CPU generation. Maintenance is straightforward: keep the interior of your PC case clean of dust using compressed air to maintain airflow and prevent thermal throttling on the M.2 drives and chipset heatsinks.

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