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ATX motherboard in turquoise and white with integrated I/O shield and large heatsinks, plus boxed Ryzen CPU

ASUS

ASUS ROG STRIX X870E-H S MIKU AMD motherboard & Ryzen 9 9900X3D CPU Combo

SKU CH-74H4-BPFQ0

ATX AM5 board with Ryzen 9 9900X3D, DDR5 to 8000 MT/s, dual USB4, Wi‑Fi 7, 5 Gbps LAN, four M.2 slots and 16+2+1 80A power stages

  • ProcessorAMD Socket AM5 for AMD Ryzen 9000 & 8000 & 7000 Series Deskt
  • ChipsetAMD X870E
  • Form factorATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Supported memorySupports up to 8000+MT/s(OC)

Model ROG STRIX X870E-H S MIKU

CPU +R9 9900X3D

  • Ready for advanced AI PCs with powerful connectivity
  • AMD AM5 socket supports Ryzen 9000, 8000 and 7000 series processors
  • Intelligent control via AI Advisor, AI Cache Boost, AI Cooling II and AI Networking II
  • Robust 16+2+1 power solution rated 80A per stage with dual ProCool II connectors
  • Two PCIe 5.0 M.2 slots and two PCIe 4.0 M.2 slots with substantial cooling

AM5 Platform for Ryzen 9000

This combo pairs an ASUS ROG STRIX X870E-H S MIKU motherboard with a Ryzen 9 9900X3D processor on the AM5 socket. The board supports Ryzen 9000, 8000 and 7000 series CPUs with four DDR5 slots up to 256GB. It targets builders who want high core counts and large cache for gaming and AI workloads.

Upgrade Path from Older AM5

Moving from a Ryzen 7000 chip to the 9900X3D adds 128MB of L3 cache and Zen 5 architecture on a 4nm process. The X870E chipset unlocks PCIe 5.0 on the primary x16 slot and the first M.2, while 7000 series CPUs run that slot at PCIe 4.0. The jump is worth it when you need the extra cache and faster storage lanes.

Straightforward ATX Install

Standard ATX mounting fits most cases and the board uses dual ProCool II power connectors for the 16+2+1 phase VRM rated at 80A per stage. Heatsinks cover the VRM and all four M.2 slots with thermal pads pre-applied. Common issues are forgetting the CPU power cables or not seating DDR5 modules fully until the clips click.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $1,292.99
Pricier than about 92% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASUS
Model nameROG STRIX X870E-H S MIKU+(R9 9900 × 3D)
Part numberROG STRIX X870E-H S MIKU+(R9 9900 × 3D)
Processor
ProcessorAMD Socket AM5 for AMD Ryzen 9000 & 8000 & 7000 Series Desktop Processors
CPU socketAM5
ChipsetAMD X870E
Memory
Memory slot count4 × 288pin (DDR5)
Supported memorySupports up to 8000+MT/s(OC)
Max supported RAM256 GB
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsSupports 4 x M.2 slots and 4 x SATA 6Gb/s ports
AMD Ryzen 9000 & 7000 Series Desktop Processors
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
M.2_2 slot (Key M), type 2280/22110 (supports PCIe 5.0 x4 mode)*
AMD Ryzen 8000 Series Desktop Processors*
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4/x2 mode)
M.2_2 slot (Key M), type 2280/22110 (Not supports)**
AMD X870E Chipset
M.2_3 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
M.2_4 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
* M.2_2 shares bandwidth with PCIEX16(G5). When M.2_2 is occu
SATA and RAID supportAMD RAIDXpert2 Technology*
Ryzen 9000 Series Processors: RAID 0/1/5/10
Ryzen 8000 Series Processors: RAID 0/1
Ryzen 7000 Series Processors: RAID 0/1/10
Audio & video
Audio chipRealtek ALC1220P 7.1 Surround Sound High Definition Audio CODEC*
- Impedance sense for front and rear headphone outputs
- Internal audio Amplifier to enhance the highest quality sound for headphone and speakers
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- High quality 120 dB SNR stereo playback output and 113 dB SNR recording input (Line-in)
- Supports up to 32-Bit/192 kHz playback*
Audio Features
- SupremeFX Shielding Technology
- Savitech SV3H712 AMP
- Rear optical S/PDIF out port
- Premium audio capacitors
- Audio cover
Sound channels7.1 Channels
Connectivity
Maximum network speed5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
PCIe 5.0 x16 slotsAMD Ryzen 9000 & 7000 Series Desktop Processors*
1 x PCIe 5.0 x16 slot (supports x16 mode)
AMD Ryzen 8000 Series Desktop Processors*
1 x PCIe 4.0 x16 slot (supports x8/x4 mode)**
PCIe 4.0 x16 slots1 x PCIe 4.0 x16 slot (supports x4 mode)
Onboard USB headers1 x USB 20 Gbit/s connector (supports USB Type-C)
1 x USB 5 Gbit/s header supports 2 additional USB 5 Gbit/s ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports
Power
Power connectors1 × 24-pin Main Power connector
2 × 8-pin +12 V CPU Power connector
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 supportSupported
More details
BIOS256 Mb Flash ROM, UEFI AMI BIOS

Other versions of this model

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Questions about this item

What case and power connectors does the ASUS ROG STRIX X870E-H S MIKU need?

The board uses the standard ATX form factor and requires dual ProCool II power connectors for the 16+2+1 power solution rated at 80A per stage.

Which step is often missed when installing the Ryzen 9 9900X3D into the AM5 socket?

Many builders forget to update the BIOS before fitting the 120W Zen 5 CPU; without the latest firmware the system will not post.

What cooling maintenance will the motherboard's M.2 heatsinks and VRM thermal pads require later?

The massive heatsinks with integrated I/O cover and high-conductivity thermal pads should be checked for dust buildup and pad degradation every 12 months.

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