ASUS TX GAMING B650EM WIFI W AMD motherboard with Ryzen 9 9900X CPU
- AM5
ASUS
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
model PRIME B650-PLUS
+CPU +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.
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.
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.
| Brand | ASUS |
|---|---|
| Series | Prime |
| Model | PRIME B650-PLUS+R9 9900X |
| CPU Socket Type | AM5 |
| CPU Type | Supports AMD Ryzen 7000 Series Desktop Processors* * Refer to www.asus.com for CPU support list. |
| Chipset | AMD B650 |
| Number of Memory Slots | 4x288pin (DDR5) |
| Memory Standard | DDR5 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 Supported | 256GB |
| Channel Supported | Dual Channel |
| ECC Supported | Yes |
| Buffer Supported | Un-buffered |
| Memory Feature | Supports AMD EXTended Profiles for Overclocking (EXPO) OptiMem II |
| PCI Express 4.0 x16 | AMD 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 x1 | 2 x PCIe 4.0 x1 slots |
| Serial ATA (SATA) | 4 x SATA 6Gb/s |
| M.2 | AMD 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 RAID | AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/10 and SATA RAID 0/1/10 |
| Audio Channels | Realtek 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 Speed | 2.5Gbps |
| Wireless LAN | Vertical M.2 slot only (Key E, PCIe)* * Wi-Fi module is sold separately. |
| Back I/O Ports | 4 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 USB | 1 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 Connectors | Fan 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 Factor | ATX |
| Dimensions (W x L) | 12.0" x 9.6" |
| Power Pin | 1 x 24-pin Main Power connector 1 x 8-pin +12V Power connector |
| Windows 11 | Supported |
| Features | ASUS 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 Contents | 1 x AMD Ryzen 9 9900X 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 |
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Yes, the board supports up to 256 GB across its four DDR5 slots.
The CPU is a 9000-series part; the board may need a BIOS update before it will post with that processor.
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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