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ASUS PRIME B850-PLUS ATX motherboard with Ryzen 7 9800X3D CPU in AM5 socket

ASUS

ASUS PRIME B850-PLUS & Ryzen 7 9800X3D AMD motherboard CPU combo

SKU CH-1GAN-H2977

B850 ATX motherboard paired with an 8-core Ryzen 7 9800X3D CPU featuring 3D V-Cache, 12+2 phase power, three M.2 slots including PCIe 5.0, 2.5Gb Ethernet and DDR5 AEMP support

  • CPU Socket TypeAM5

Motherboard PRIME B850-PLUS

CPU + R7 9800X3D

  • Stable power for high-end CPUs with 12+2 phase VRM design
  • Faster DDR5 speeds on any kit via ASUS Enhanced Memory Profile
  • One PCIe 5.0 and two PCIe 4.0 M.2 slots for rapid storage
  • 5Gb Ethernet with LANGuard for reliable wired networking
  • 8-core Zen 5 CPU with 96MB L3 cache and 5.2GHz boost

Combo Foundation

The ASUS PRIME B850-PLUS motherboard paired with the AMD Ryzen 7 9800X3D creates a ready-to-build platform for gamers and creators who want current-gen AM5 performance without selecting parts individually. The board brings a 12+2 phase power design with Digi+ VRM to feed the processor cleanly, while the CPU delivers 8 cores, 16 threads and a 5.2 GHz max boost on the Zen 5 architecture.

Storage And Network Gains

Three M.2 slots change how much fast storage fits: one PCIe 5.0 x4 slot reaching 128 Gbps and two PCIe 4.0 x4 slots sit alongside a 2.5 Gb Ethernet port with LANGuard. The pre-mounted I/O shield, Fan Xpert 2+ software and Aura Sync addressable headers simplify assembly and let you tune cooling or lighting without extra downloads.

Memory And Cache Headroom

DDR5-5600 support with AEMP raises memory speeds even on non-EXPO kits, while the processor’s 96 MB L3 cache and 8 MB L2 cache give games and heavy workloads a large, low-latency buffer. The combination handles modern titles and multitasking comfortably; storage bandwidth scales with the PCIe 5.0 slot, and the 2.5 Gb network link caps wired throughput.

Highlights

  • Stable power for high-end CPUs with 12+2 phase VRM design
  • Faster DDR5 speeds on any kit via ASUS Enhanced Memory Profile
  • One PCIe 5.0 and two PCIe 4.0 M.2 slots for rapid storage
  • 5Gb Ethernet with LANGuard for reliable wired networking
  • 8-core Zen 5 CPU with 96MB L3 cache and 5.2GHz boost

Specifications

BrandASUS
ModelPRIME B850-PLUS+R7 9800X3D
CPU Socket TypeAM5

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Questions about this item

How often will the 12+2 phase VRM need attention or replacement?

The 12+2 phase power design uses premium components and Digi+ VRM for stable delivery, so the VRM itself requires no scheduled maintenance under normal use.

Which limit appears first when the Ryzen 7 9800X3D runs sustained loads?

The 96 MB L3 cache and 5.2 GHz max boost keep gaming latency low, so thermal headroom from your cooler becomes the first practical limit.

What noise, heat or power should I expect once the combo runs all day?

ASUS Fan Xpert 2+ controls fan curves for the 12+2 phase VRM and CPU, letting you balance acoustics and thermals during continuous operation.

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