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ATX motherboard in teal and pink Hatsune Miku livery with large heatsinks and bundled Ryzen 9 9900X CPU

ASUS

ASUS ROG STRIX X870E-H S MIKU+R9 9900X AMD motherboard & CPU combo

SKU CH-YQZN-EXT8J

AM5 combo pairs a 12-core Ryzen 9 9900X with an X870E board offering dual USB4, Wi-Fi 7, four DDR5 slots up to 8000 MT/s, two PCIe 5.0 M.2 slots, 5 Gbps LAN and 7.1 audio

  • 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

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CPU + Ryzen 9 9900X

  • Ready for Ryzen 9000, 8000 and 7000 series on AM5 socket
  • 12 cores and 24 threads with 5.6 GHz max boost on Zen 5 architecture
  • AI Advisor, AI Cache Boost, AI Cooling II and AI Networking II simplify setup
  • 16+2+1 power stages rated 80A with dual ProCool II connectors
  • Two PCIe 5.0 and two PCIe 4.0 M.2 slots with substantial cooling solutions

Combo for AM5 builders

This bundle pairs an ASUS ROG STRIX X870E-H S MIKU motherboard with an AMD Ryzen 9 9900X processor. The 12-core, 24-thread CPU runs up to 5.6 GHz and includes 64 MB L3 cache. The board targets enthusiasts who need robust power delivery and extensive connectivity for demanding workloads. It fits the AM5 socket used by Ryzen 7000, 8000 and 9000 series chips.

PCIe 5.0 and DDR5 limits

The platform provides one PCIe 5.0 x16 slot and two PCIe 5.0 M.2 slots when a Ryzen 9000 or 7000 processor is installed; with Ryzen 8000 the primary slot operates at PCIe 4.0 x8 or x4. Memory tops out at 256 GB across four DDR5 slots, with dual-channel support and speeds beyond 8000 MT/s via overclocking. Four SATA 6Gb/s ports remain available regardless of CPU generation.

12 cores and 5.6 GHz boost

The Ryzen 9 9900X delivers 12 cores and 24 threads based on the Zen 5 architecture, reaching a 5.6 GHz max boost clock while unlocked for overclocking. This core count and frequency combination defines the performance ceiling for rendering, compilation and multi-threaded AI tasks. The CPU also brings 12 MB L2 cache and native DDR5-5600 support to the AM5 platform.

How it compares

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

Price $1,122.99
Pricier than about 91% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Product lineROG STRIX
Model nameROG STRIX X870E-H S MIKU+R9 9900X
Part numberROG STRIX X870E-H S MIKU+R9 9900X
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

Which CPU is included in this combo?

The combo includes the AMD Ryzen 9 9900X processor with 12 cores, 24 threads, 5.6 GHz max boost and 64 MB L3 cache.

What does the 5.6 GHz boost mean for actual workloads?

The 5.6 GHz max boost gives high single-thread speed for gaming and light tasks, while the 12 Zen 5 cores sustain multi-thread throughput for rendering and compile jobs.

What USB4 capability does the board provide?

Two USB4 Type-C ports deliver up to 20 Gbps each for fast external storage and display output.

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