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ATX motherboard in black with silver heatsinks, CPU installed, I/O shield attached

ASUS

ASUS Prime B650-PLUS + Ryzen 7 9800X3D AMD motherboard CPU combo

SKU CH-TZTH-K8D89

Combines a B650 motherboard with a Ryzen 7 9800X3D CPU, supporting DDR5 memory up to 6400, PCIe 5.0 M.2, 2.5Gb LAN, USB4 and comprehensive cooling

  • 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 9800X3D

  • Ready-to-build combo with Ryzen 7 9800X3D CPU included
  • Up to 256 GB DDR5 memory across four 288-pin slots
  • PCIe 5.0 M.2 slot plus PCIe 4.0 x16 graphics slot
  • Realtek 2.5 Gbps LAN and USB 3.2 Gen 2 Type-C connectivity
  • BIOS FlashBack updates firmware without CPU or memory installed

Combo motherboard and CPU

The ASUS Prime B650-PLUS motherboard is paired with an AMD Ryzen 7 9800X3D processor in a single package. The AM5 socket board supports Ryzen 7000, 8000 and 9000 series desktop CPUs. This combination targets builders who want a ready-to-run platform for gaming and multitasking workloads. A BIOS update may be required before installing 8000 or 9000 series processors.

PCIe 5.0 M.2 and 2.5 Gb Ethernet limits

The primary M.2 slot operates at PCIe 5.0 x4 while the second runs at PCIe 4.0 x4, so the fastest drives only reach peak throughput in the top slot. The 2.5 Gb LAN port caps wired network transfers at that rate regardless of router capability. Four SATA 6 Gbps ports and two PCIe 4.0 x1 slots provide additional expansion within the chipset lane budget.

VRM and M.2 heatsinks with USB4 support

A VRM heatsink, dedicated M.2 heatsink and PCH heatsink work with hybrid fan headers and Fan Xpert 2+ for thermal management. Rear I/O includes USB 3.2 Gen 2 Type-C, DisplayPort, HDMI and a BIOS FlashBack button that updates firmware without a CPU or memory installed. Onboard addressable Gen 2 and standard RGB headers enable Aura Sync lighting control. USB4 support adds high-speed peripheral connectivity through compatible headers.

How it compares

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

Price $748.99
Pricier than about 76% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Product linePrime
Model namePRIME B650-PLUS+R7 9800 × 3D
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

5 more in the same range

Questions about this item

Should I pick the motherboard with the Ryzen 7 9800X3D or buy the board alone?

This listing is a fixed bundle that already pairs the PRIME B650-PLUS board with the Ryzen 7 9800X3D, so there is no separate board-only option to choose.

What does the 9800X3D's 3D V-Cache do once it is installed in this board?

The extra cache on the 9800X3D sits directly on the CPU die and cuts latency for gaming workloads, letting the AM5 socket and B650 chipset feed data faster without extra memory tweaks.

How fast can the PCIe 5.0 M.2 slot actually run a drive?

The primary M.2 slot is wired for PCIe 5.0 x4 from the Ryzen 7000 series processor, so a compatible drive can hit the full 5.0 x4 bandwidth when the CPU is installed.

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