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ATX motherboard in dark grey with silver heatsinks and a boxed Ryzen 9 9950X3D processor

ASUS

ASUS PRIME B650-PLUS + Ryzen 9 9950X3D AMD motherboard CPU combo

SKU CH-AN45-0ECPW

ATX AM5 board paired with a 16-core Zen 5 CPU, DDR5 to 6400, PCIe 5.0 M.2, 2.5Gb LAN, USB4 support and BIOS FlashBack

  • 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 9 9950X3D

  • 16-core CPU with 128 MB L3 cache for heavy multitasking
  • DDR5 memory up to 6400 MT/s with OptiMem II for stable overclocking
  • PCIe 5.0 M.2 slot enables fastest storage bandwidth
  • 5 Gb Ethernet plus USB4 support for high-speed connectivity
  • VRM, M.2 and PCH heatsinks with Fan Xpert 2+ keep thermals in check

AM5 Combo for Ryzen 9000 and 7000

This motherboard and CPU combination pairs the ASUS PRIME B650-PLUS with an AMD Ryzen 9 9950X3D processor. The AM5 socket supports Ryzen 9000, 8000 and 7000 series desktop CPUs. Four DDR5 slots accept up to 256 GB of memory. The board delivers PCIe 5.0 on the primary M.2 slot and 2.5 Gb Ethernet for fast networking.

Sustained Load Behaviour

The Ryzen 9 9950X3D runs at a 170 W TDP with 128 MB of L3 cache and 16 MB of L2 cache. The motherboard provides a VRM heatsink, an M.2 heatsink and a PCH heatsink linked to hybrid fan headers controlled by Fan Xpert 2+. This cooling arrangement is designed to maintain performance during extended workloads rather than brief bursts.

Build and Connectors

The ATX board uses 288-pin DDR5 slots with OptiMem II trace routing for signal integrity. Rear I/O includes HDMI, DisplayPort, USB 3.2 Gen 2 Type-C, USB 3.2 Gen 1 Type-C and USB4 support. Four SATA 6 Gb/s ports and two PCIe 4.0 x1 slots add expansion room. BIOS FlashBack updates firmware without a CPU or memory installed. Aura Sync headers address RGB lighting.

Highlights

  • 16-core CPU with 128 MB L3 cache for heavy multitasking
  • DDR5 memory up to 6400 MT/s with OptiMem II for stable overclocking
  • PCIe 5.0 M.2 slot enables fastest storage bandwidth
  • 5 Gb Ethernet plus USB4 support for high-speed connectivity
  • VRM, M.2 and PCH heatsinks with Fan Xpert 2+ keep thermals in check

Specifications

BrandASUS
SeriesPrime
ModelPRIME B650-PLUS+R9 9950X3D
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 9 9950X3D 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

How loud and hot does the Ryzen 9 9950X3D run under sustained 170W loads?

The CPU has a 170W TDP. The board includes a VRM heatsink, M.2 heatsink, PCH heatsink, hybrid fan headers and Fan Xpert 2+ to manage thermals.

Which DDR5 memory kit do I need to populate the four 288-pin slots?

The board accepts DDR5 modules at speeds from 4800 up to 6400+(OC) with AMD EXPO support. Maximum capacity is 256GB across four slots in dual-channel mode.

Will my existing SATA SSDs and PCIe 4.0 graphics card work with this AM5 platform?

The board provides four SATA 6Gbps ports, one PCIe 4.0 x16 slot at x16 mode, one PCIe 4.0 x16 slot at x4 mode and two PCIe 4.0 x1 slots for legacy add-in cards.

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