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ATX motherboard in grey with silver heatsinks and CPU in clear box

ASUS

ASUS PRIME B650-PLUS + Ryzen 9 9900X AMD motherboard CPU combo

SKU CH-JK7Z-EN0MV

A ready-to-build AMD AM5 platform pairing a 12-core 5.6 GHz Ryzen 9 9900X with a B650 board that supports DDR5 up to 6400 OC, PCIe 5.0 M.2, 2.5 Gb Ethernet and USB4

  • ProcessorSupports AMD Ryzen 7000 Series Desktop Processors* * Refer t
  • ChipsetAMD B650
  • Form factorATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryDDR5 6400+(OC) / 6200(OC) / 6000(OC) / 5800(OC) / 5600(OC) /

Model PRIME B650-PLUS

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CPU +Ryzen 9 9900X

  • 12 cores and 24 threads handle heavy workloads with the included Ryzen 9 9900X
  • DDR5 memory scales to 6400 MT/s across four slots for 256 GB total capacity
  • M.2 slot runs at PCIe 5.0 x4 for the fastest storage throughput
  • Realtek 2.5 Gb LAN and USB 3.2 Gen 2 Type-C keep data moving quickly
  • VRM, M.2 and PCH heatsinks plus Fan Xpert 2+ cool the system under load

AM5 combo for 12-core Ryzen 9 9900X

The ASUS PRIME B650-PLUS motherboard ships paired with a Ryzen 9 9900X processor that delivers 12 cores and 24 threads on the Zen 5 architecture. The board uses the AMD B650 chipset and an AM5 socket ready for Ryzen 7000, 8000 and 9000 series CPUs. Four DDR5 slots support up to 256 GB of memory with EXPO profiles and OptiMem II trace routing for stability at higher data rates.

VRM heatsink M.2 heatsink PCH heatsink Fan Xpert 2+

Comprehensive cooling covers the voltage regulators, the primary M.2 slot and the chipset with dedicated heatsinks. Hybrid fan headers connect to Fan Xpert 2+ software for automatic speed curves based on component temperatures. The 12-core CPU has a 5.6 GHz maximum boost frequency and an unlocked multiplier for manual overclocking within the board's power delivery limits.

PCIe 5.0 M.2 2.5Gb LAN USB4 support BIOS FlashBack

The top M.2 slot runs at PCIe 5.0 x4 for 2242 2260 2280 and 22110 drives while a second slot provides PCIe 4.0 x4. Rear I/O includes Realtek 2.5Gb Ethernet USB 3.2 Gen 2 Type-C HDMI DisplayPort and a USB BIOS FlashBack port that updates firmware without a CPU or memory installed. USB4 support and front-panel USB 3.2 Gen 1 Type-C complete the connectivity set.

How it compares

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

Price $726.99
Pricier than about 75% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Product linePrime
Model namePRIME B650-PLUS+R9 9900X
Processor
ProcessorSupports AMD Ryzen 7000 Series Desktop Processors*
* Refer to www.asus.com for CPU support list.
CPU socketAM5
ChipsetAMD B650
Memory
Memory slot count4 × 288pin (DDR5)
Max supported RAM256 GB
Memory channelsDual Channel
ECC supportYes
BufferingUn-buffered
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsAMD Ryzen 7000 Series Desktop Processors
M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 5.0 x4 mode)
M.2_2 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
SATA and RAID supportAMD RAIDXpert2 Technology supports both PCIe RAID 0/1/10 and SATA RAID 0/1/10
Audio & video
Sound channelsRealtek 7.1 Surround Sound High Definition Audio CODEC
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- Supports up to 24-Bit/192 kHz playback
Audio Features
- Audio Shielding
- Premium audio capacitors
- Dedicated audio PCB layers
Connectivity
Maximum network speed2.5 Gbit/s
Wi-Fi standardVertical M.2 slot only (Key E, PCIe)*
* Wi-Fi module is sold separately.
Ports & slots
PCIe x1 slots2 x PCIe 4.0 x1 slots
Onboard USB headers1 x USB 3.2 Gen 1 connector (supports USB Type-C )
1 x USB 3.2 Gen 1 header supports 2 additional USB 3.2 Gen 1 ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports
Power
Power connectors1 × 24-pin Main Power connector
1 × 8-pin +12 V Power connector
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 supportSupported

Other versions of this model

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Questions about this item

Will the board accept 256 GB of DDR5 memory?

Yes, the board supports up to 256 GB across its four DDR5 slots.

Does the included Ryzen 9 9900X run on this motherboard without a BIOS update?

The CPU is a 9000-series part; the board may need a BIOS update before it will post with that processor.

Can I add a PCIe 5.0 M.2 drive and a second PCIe 4.0 M.2 drive at the same time?

Yes, the primary M.2 slot runs at PCIe 5.0 x4 and the second at PCIe 4.0 x4, both usable together.

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