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ATX motherboard with large VRM heatsinks and installed AM5 CPU

ASUS

ASUS PRIME X870-P & AMD Ryzen 9 9900X3D Combo AMD Motherboard

SKU CH-ENSA-NGMXJ

A motherboard and CPU combo built on the AMD AM5 platform with a 12-core Ryzen 9 9900X3D processor, 128MB L3 cache, DDR5 memory support, PCIe 5.0 connectivity, four M.2 slots, Realtek 2.5Gb Ethernet.

  • CPU Socket TypeAM5

model PRIME X870-P

+CPU + Ryzen 9 9900X3D

  • Ready-to-build combo with matched Ryzen 9 9900X3D CPU and PRIME X870-P motherboard
  • Strong VRM delivery from 14 plus 2 plus 1 eighty-amp DrMOS stages with large cooler
  • Comprehensive cooling control via multiple heatsinks and Fan Xpert 4 software
  • Fast wired and USB links including 2.5 Gb Ethernet and 40 Gbps ports
  • PCIe 5.0 platform ready for high-speed graphics and storage

Combo Platform for AM5 Builds

This bundle pairs the ASUS PRIME X870-P motherboard with the AMD Ryzen 9 9900X3D processor. The board uses the AMD X870 chipset and AM5 socket to support Ryzen 9000 series CPUs. It targets enthusiasts who want a ready-to-go foundation for high-performance desktop systems.

Sustained Load Behaviour

The motherboard delivers power through a 14+2+1 DrMOS arrangement rated at 80A per stage with a large VRM heatsink. Multiple high-efficiency heatsinks and hybrid fan headers are managed by ASUS Fan Xpert 4 software. The 120W Zen 5 CPU includes 128MB L3 cache and 12MB L2 cache for consistent throughput under extended workloads.

Installation Practicalities

A pre-installed I/O backplate and BIOS FlashBack button simplify first-time setup and firmware updates without a CPU installed. SafeSlot reinforced PCIe 5.0 slots add retention strength for heavy graphics cards. Builders should verify DDR5 memory compatibility and case clearance for the VRM cooler height before assembly.

Highlights

  • Ready-to-build combo with matched Ryzen 9 9900X3D CPU and PRIME X870-P motherboard
  • Strong VRM delivery from 14 plus 2 plus 1 eighty-amp DrMOS stages with large cooler
  • Comprehensive cooling control via multiple heatsinks and Fan Xpert 4 software
  • Fast wired and USB links including 2.5 Gb Ethernet and 40 Gbps ports
  • PCIe 5.0 platform ready for high-speed graphics and storage

Specifications

BrandASUS
ModelPRIME X870-P+R9 9900X3D
CPU Socket TypeAM5

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How loud and hot does the PRIME X870-P get when the 120W Ryzen 9 9900X3D runs all day?

The board uses a 14+2+1 phase 80A DrMOS power design with a large VRM heatsink and multiple hybrid fan headers controlled by Fan Xpert 4 software to manage thermals and acoustics under sustained loads.

What memory and storage must I already own to use this DDR5 motherboard and its four M.2 slots?

You need DDR5 DIMMs for the memory slots and M.2 SSDs for the four M.2 connectors; the board also provides SATA 6Gbps ports for any 2.5-inch or 3.5-inch drives you want to keep.

Will my older PCIe 3.0 graphics card and SATA SSDs work at full speed alongside the PCIe 5.0 slots on this X870 board?

The motherboard includes PCIe 5.0 slots that are backward compatible with PCIe 3.0 cards, and its SATA 6Gbps ports run at full speed for existing SATA SSDs and hard drives.

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