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ASUS PRIME B650-PLUS motherboard with Ryzen 7 9700X CPU in AM5 socket ATX form factor black PCB silver heatsinks

ASUS

ASUS PRIME B650-PLUS + Ryzen 7 9700X AMD motherboard combo

SKU CH-3755-XC42G

Combines an AM5 board with 8-core, 16-thread Zen 5 CPU, DDR5 to 6400, PCIe 5.0 M.2, 2.5Gb LAN and BIOS FlashBack

  • 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 7 9700X

  • 8 cores and 16 threads deliver high frame rates in games
  • DDR5 up to 6400 MT/s overclocked gives fast memory bandwidth
  • PCIe 5.0 M.2 slot enables rapid storage speeds
  • 5 Gb Ethernet provides low-latency wired networking
  • VRM, M.2 and PCH heatsinks with Fan Xpert 2+ keep temperatures controlled

Socket AM5 platform for Ryzen 9000

This combo pairs the ASUS PRIME B650-PLUS motherboard with an AMD Ryzen 7 9700X processor. The board uses the B650 chipset and AM5 socket to support Ryzen 7000, 8000 and 9000 series CPUs. It targets builders who want a ready-to-run foundation for gaming or content creation. The CPU delivers 8 cores and 16 threads based on the Zen 5 architecture.

Memory, power and BIOS readiness

Verify that your power supply provides the necessary connectors for the board and CPU. You will need DDR5 modules; the board offers four 288-pin slots with a maximum capacity of 256 GB in dual-channel mode. Supported speeds range from 4800 up to 6400+(OC) and EXPO profiles are available. A BIOS update may be required before the 9700X will post, so prepare a USB stick and use the BIOS FlashBack button if the board ships on an older revision.

Connectivity, cooling and daily use

The rear I/O includes HDMI and DisplayPort outputs driven by the processor graphics, a 2.5 Gbps LAN port, USB 3.2 Gen 2 Type-C and USB4 support. Storage options comprise one PCIe 5.0 M.2 slot and one PCIe 4.0 M.2 slot, both accepting 2242, 2260, 2280 and 22110 form factors, plus four SATA 6Gb/s ports. Heatsinks cover the VRM, primary M.2 and PCH, while hybrid fan headers and Fan Xpert 2+ manage thermals. Addressable Gen 2 and standard RGB headers enable Aura Sync lighting control.

How it compares

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

Price $593.99
Pricier than about 70% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Product linePrime
Model namePRIME B650-PLUS+R7 9700X
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 motherboard support the Ryzen 7 9700X CPU out of the box or do I need to update the BIOS first?

A BIOS update may be required for Ryzen 9000 series processors. The board includes BIOS FlashBack so you can update using a FAT32 USB stick without a CPU or memory installed.

What DDR5 memory speeds can I run with this combo and how much total capacity is supported?

The board supports DDR5 speeds from 4800 up to 6400+(OC) depending on the CPU and module configuration, with a maximum capacity of 256 GB across four slots in dual-channel mode.

Which M.2 slots provide PCIe 5.0 and PCIe 4.0 speeds and what drive lengths do they accept?

The primary M.2 slot runs at PCIe 5.0 x4 and the second at PCIe 4.0 x4; both accept 2242, 2260, 2280 and 22110 form-factor drives.

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