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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

  • CPU Socket TypeAM5
  • CPU TypeSupports AMD Ryzen 7000 Series Desktop Processors* * Refer t
  • ChipsetAMD B650
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardDDR5 6400+(OC) / 6200(OC) / 6000(OC) / 5800(OC) / 5600(OC) /
  • Maximum Memory Supported256GB

model PRIME B650-PLUS

+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.

Highlights

  • 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

Specifications

BrandASUS
SeriesPrime
ModelPRIME B650-PLUS+R7 9800X3D
CPU Socket TypeAM5
CPU TypeSupports AMD Ryzen 7000 Series Desktop Processors*
* Refer to www.asus.com for CPU support list.
ChipsetAMD B650
Number of Memory Slots4x288pin (DDR5)
Memory StandardDDR5 6400+(OC) / 6200(OC) / 6000(OC) / 5800(OC) / 5600(OC) / 5400(OC) / 5200 / 5000 / 4800*
* Supported memory types, data rate(Speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information refer to www.asus.com for memory support list.
* Non-ECC, Un-buffered DDR5 Memory supports On-Die ECC function.
Maximum Memory Supported256GB
Channel SupportedDual Channel
ECC SupportedYes
Buffer SupportedUn-buffered
Memory FeatureSupports AMD EXTended Profiles for Overclocking (EXPO)
OptiMem II
PCI Express 4.0 x16AMD Ryzen 7000 Series Desktop Processors
1 x PCIe 4.0 x16 slot (supports x16 mode)
AMD B650 Chipset
1 x PCIe 4.0 x16 slot (supports x4 mode)
* Please check the PCIe bifurcation table on the ASUS support site
PCI Express x12 x PCIe 4.0 x1 slots
Serial ATA (SATA)4 x SATA 6Gb/s
M.2AMD 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 RAIDAMD RAIDXpert2 Technology supports both PCIe RAID 0/1/10 and SATA RAID 0/1/10
Audio 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
Max LAN Speed2.5Gbps
Wireless LANVertical M.2 slot only (Key E, PCIe)*
* Wi-Fi module is sold separately.
Back I/O Ports4 x USB 3.2 Gen 2 ports (3 x Type-A + 1 x USB Type-C)
2 x USB 3.2 Gen 1 ports (2 x Type-A)
2 x USB 2.0 ports (2 x Type-A)
1 x DisplayPort
1 x HDMI port
1 x Vertical M.2 slot (Key E)
1 x Realtek 2.5Gb Ethernet port
5 x Audio jacks
1 x Optical S/PDIF out port
1 x BIOS FlashBack button
Onboard USB1 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
Other ConnectorsFan and Cooling related
1 x 4-pin CPU Fan header
1 x 4-pin CPU OPT Fan header
1 x 4-pin AIO Pump header
3 x 4-pin Chassis Fan headers
Storage related
2 x M.2 slots (Key M)
4 x SATA 6Gb/s ports
Miscellaneous
3 x Addressable Gen 2 headers
1 x Aura RGB header
1 x Clear CMOS header
1 x COM Port header
1 x Front Panel Audio header (AAFP)
1 x SPI TPM header (14-1pin)
1 x 20-3 pin System Panel header with Chassis intrude function
1 x Thunderbolt (USB4) header
Form FactorATX
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24-pin Main Power connector
1 x 8-pin +12V Power connector
Windows 11Supported
FeaturesASUS 5X PROTECTION III
- DIGI+ VRM
- LANGuard
- Overvoltage Protection
- Safeslot Core+
- Stainless-Steel Back I/O
ASUS Q-Design
- Q-DIMM
- Q-LED Core
- Q-Slot
ASUS Thermal Solution
- Flexible M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- BIOS FlashBack button
- BIOS FlashBack LED
- ProCool
Aura Sync
- Aura RGB header
- Addressable Gen 2 headers
Package Contents1 x AMD Ryzen 7 9800X3D CPU
1 x Shin-Etsu X-23-7868-2D (1.8g)
Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x I/O Shield
1 x M.2 Rubber Package
1 x Screw package for M.2 SSD
Documentation
1 x User guide

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

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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