| Model |
PRIME B840-PLUS WIFI-CSM |
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| CPU |
AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors* |
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* Refer to https://www.asus.com/support/download-center/ for CPU support list. |
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| Chipset |
AMD B840 Chipset |
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| Memory |
4 x DIMM slots, max. 256GB, DDR5 Supports up to 7600+MT/s (OC) with Ryzen™ 9000 & 8000 & 7000 Series Processors, ECC and Non-ECC Un-buffered DIMM* |
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Dual channel memory architecture |
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Supports AMD Extended Profiles for Overclocking (EXPO™) |
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ASUS Enhanced Memory Profile (AEMP) |
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* Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/download-center/. Adjustments will be made based on the specifications of mass-produced memory products available on the market. |
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* Non-ECC, un-buffered DDR5 memory supports On-Die ECC function. |
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| Graphics |
1 x DisplayPort** |
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1 x HDMI™ port*** |
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* Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications. |
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** Supports max. 8K@30Hz as specified in DisplayPort 1.4. |
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*** Supports 4K@60Hz as specified in HDMI 2.1. |
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| Expansion Slots |
AMD Ryzen™ 9000 & 7000 Series Desktop Processors* |
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1 x PCIe 4.0 x16 slot (supports x16 mode) |
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AMD Ryzen™ 8000 Series Desktop Processors |
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1 x PCIe 4.0 x16 slot (supports x8/x4 mode)** |
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AMD B840 Chipset |
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1 x PCIe 3.0 x16 slot (support x4 mode)*** |
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2 x PCIe 3.0 x16 slots (support x1 mode)*** |
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1 x PCIe 3.0 x1 slot*** |
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* Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/). |
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** Specifications vary by CPU types. |
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*** The PCIEX16(G3)_1/3 and PCIEX1(G3) share bandwidth with PCIEX16(G3)_2. The PCIEX16(G3)_2 will run x1 mode when any of the PCIEX16(G3)_1/3 and PCIEX1(G3) slots is occupied. |
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– To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals. |
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| Storage |
Supports 3 x M.2 slots and 4 x SATA 6Gb/s ports |
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AMD Ryzen™ 9000 & 7000 Series Desktop Processors |
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M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) |
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M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) |
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AMD Ryzen™ 8000 Series Desktop Processors |
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M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) |
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M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode)* |
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AMD B840 Chipset |
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M.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 mode |
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4 x SATA 6Gb/s ports |
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* Specifications vary by CPU types. |
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AMD RAIDXpert2 Technology |
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Ryzen™ 9000 Series Processors: RAID 0/1/5/10 |
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Ryzen™ 8000 Series Processors: RAID 0/1 |
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Ryzen™ 7000 Series Processors: RAID 0/1/10 |
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| Ethernet |
1 x Realtek 2.5Gb Ethernet |
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ASUS LANGuard |
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| Wireless & Bluetooth |
“Wi-Fi 6E |
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2×2 Wi-Fi 6E (802.11ax) |
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Supports 2.4/5/6GHz frequency band* |
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Bluetooth® v5.3** |
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* WiFi 6E 6GHz regulatory may vary between countries, supported only in Windows 11 or later. |
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** The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer’s website for the latest specifications.” |
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| USB |
Rear USB (Total 8 ports) |
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2 x USB 10Gbps port(s) (1 x Type-A + 1 x USB Type-C®) |
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2 x USB 5Gbps ports (2 x Type-A) |
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4 x USB 2.0 ports (4 x Type-A) |
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Front USB (Total 7 ports) |
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1 x USB 5Gbps connector (supports USB Type-C®) |
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1 x USB 5Gbps header supports 2 additional USB 5Gbps ports |
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2 x USB 2.0 headers support 4 additional USB 2.0 ports |
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* USB Type-C® power delivery output: max. 5V/3A |
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| Audio |
Realtek 7.1 Surround Sound High Definition Audio CODEC* |
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– Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking |
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– Supports up to 24-Bit/192 kHz playback |
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Audio Features |
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– Audio Shielding |
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– Premium audio capacitors |
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– Dedicated audio PCB layers |
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* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output. |
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| Back Panel I/O Ports |
1 x USB 10Gbps port (1 x USB Type-C®) |
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1 x USB 10Gbps port (1 x Type-A) |
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2 x USB 5Gbps ports (2 x Type-A) |
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4 x USB 2.0 ports (4 x Type-A) |
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1 x DisplayPort |
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1 x HDMI™ port |
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1 x Wi-Fi module |
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1 x Realtek 2.5Gb Ethernet port |
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3 x Audio jacks |
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1 x BIOS FlashBack™ button |
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| Internal I/O Connectors |
Fan and Cooling Related |
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1 x 4-pin CPU Fan header |
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1 x 4-pin CPU OPT Fan header |
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1 x 4-pin AIO Pump header |
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4 x 4-pin Chassis Fan header |
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Power Related |
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1 x 24-pin Main Power connector |
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1 x 8-pin +12V CPU Power connectors |
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1 x 4-pin +12V CPU Power connectors |
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Storage Related |
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3 x M.2 slots (Key M) |
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4 x SATA 6Gb/s ports |
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USB |
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1 x USB 5Gbps connector (supports USB Type-C® ) |
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1 x USB 5Gbps header supports 2 additional USB 5Gbps ports |
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2 x USB 2.0 headers support 4 additional USB 2.0 ports |
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Miscellaneous |
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3 x Addressable Gen 2 headers |
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1 x Clear CMOS header |
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1 x Chassis Intrusion header |
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1 x COM Port header |
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1 x Front Panel Audio header (F_AUDIO) |
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1 x S/PDIF Out header |
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1 x SPI TPM header (14-1 pin) |
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1 x 10-1 pin System Panel header |
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1 x Thunderbolt™ (USB4®) header |
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| Special Features |
ASUS 5X PROTECTION III |
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– DIGI+ VRM |
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– LANGuard |
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– Overvoltage protection |
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– SafeSlot core+ |
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– Stainless-steel back I/O |
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ASUS Q-Design |
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– Q-Antenna |
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– Q-Dashboard |
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– Q-DIMM |
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– Q-LED Core |
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– Q-Slot |
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ASUS Thermal Solution |
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– Flexible M.2 heatsink |
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– VRM heatsink design |
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ASUS EZ DIY |
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– BIOS FlashBack™ button |
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– BIOS FlashBack™ LED |
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– Pre-mounted I/O shield |
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– SafeSlot core+ |
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Aura Sync |
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– Addressable Gen 2 headers |
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| Software Features |
ASUS Exclusive Software |
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Armoury Crate |
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– Aura Creator |
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– Aura Sync |
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– Fan Xpert 2+ |
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– Power Saving |
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ASUS Driver Hub |
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ASUS GlideX |
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TurboV Core |
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ASUS CPU-Z |
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Norton 360 Deluxe (60 Days Free Trial) |
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WinRAR (40 Days Free Trial) |
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UEFI BIOS |
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ASUS EZ DIY |
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– ASUS CrashFree BIOS 3 |
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– ASUS EZ Flash 3 |
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– ASUS UEFI BIOS EZ Mode |
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– ASUS MyHotkey |
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| Remote Management Features |
IT Management software supported |
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– ASUS Control Center Express(ACCE) |
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| BIOS |
256 Mb Flash ROM, UEFI AMI BIOS |
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| Manageability |
WOL by PME, PXE |
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| Accessories |
Cables |
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2 x SATA 6Gb/s cables |
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Miscellaneous |
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1 x ASUS WiFi Q-Antenna |
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1 x M.2 rubber packages |
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3 x Screw packages for M.2 SSD |
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Documentation |
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1 x ACC Express Activation Key Card |
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1 x Quick start guide |
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| Operating System |
Windows® 11, Windows® 10 64-bit |
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| Form Factor |
ATX Form Factor |
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12 inch x 9.6 inch ( 30.5 cm x 24.4 cm ) |