ASUS PRIME B850-PLUS WIFI-CSM – Future-Ready AM5 Motherboard

About the ASUS PRIME B850-PLUS WIFI-CSM

The PRIME B850-PLUS WIFI-CSM is built for builders who want modern connectivity without paying premium board prices. This AM5 ATX motherboard supports AMD Ryzen 9000, 8000, and 7000 Series processors with the latest B850 chipset. It's designed for mid-range gaming rigs, first-time custom builds, and small business workstations that need reliability.

What This ASUS PRIME B850-PLUS WIFI-CSM Does for You

You get PCIe 5.0 support for graphics cards and M.2 storage when paired with Ryzen 9000 or 7000 CPUs. This means your system is ready for next-generation graphics cards and ultra-fast SSDs as they become available. The board includes WiFi 6E tri-band wireless (2.4/5/6GHz) and 2.5Gb Ethernet, eliminating the need for separate network adapters. DDR5 memory support up to 8000+MT/s with EXPO profiles gives you the speed headroom for demanding applications and gaming. Three M.2 slots plus four SATA ports provide flexible storage configurations for game libraries and work files.

Build Quality and Features

ASUS Q-Design features make installation easier, especially for first-time builders. Q-DIMM lets you install RAM with one-sided latches. Q-LED Core provides diagnostic feedback during boot. Q-Slot reinforces the primary PCIe slot to prevent GPU sag. The CSM (Corporate Stable Model) designation means this board includes remote management features like WOL and PXE support, useful for small business deployments. ASUS Control Center Express software lets IT managers monitor multiple systems remotely.

Perfect For

• Mid-range gaming builds with Ryzen 7 9700X or Ryzen 5 9600X processors that need modern PC cases with good airflow
• First-time builders upgrading from older Intel or AMD platforms who want straightforward installation
• Small business workstations requiring remote management and stable operation
• Budget-conscious enthusiasts who want PCIe 5.0 future-proofing without X870 board pricing

Why Buy from Mansa Computers

• 3-year Singapore warranty with ASUS Service Center support
• Fast WhatsApp inquiry response for compatibility questions
• Open 7 days a week for technical support
• Home delivery available across Singapore

Technical Specifications Summary

Socket
AMD AM5

Chipset
AMD B850

Memory
4x DDR5 DIMM, up to 256GB, 8000+MT/s (OC)

Storage
3x M.2 (PCIe 5.0/4.0), 4x SATA 6Gb/s

Networking
WiFi 6E, 2.5Gb Ethernet, Bluetooth 5.3

Expansion
1x PCIe 5.0 x16, 1x PCIe 4.0 x16, 2x PCIe 3.0 x16

Form Factor
ATX (30.5cm x 24.4cm)

Warranty
3 years ASUS Singapore

The ASUS PRIME B850-PLUS WIFI-CSM delivers the connectivity and expansion options you need for a modern AM5 build. Whether you're building your first gaming PC or upgrading a small office workstation, this board offers solid value with reliable ASUS support backing it up.

Frequently Asked Questions About ASUS PRIME B850-PLUS WIFI-CSM

Does this motherboard support PCIe 5.0 graphics cards?

Yes, when paired with AMD Ryzen 9000 or 7000 Series processors. The primary PCIe slot runs at 5.0 x16 speeds with these CPUs. With Ryzen 8000 Series processors, it runs at PCIe 4.0 x8/x4 mode instead.

Model
PRIME B850-PLUS WIFI-CSM

CPU
AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors

Chipset
AMD B850 Chipset

Memory
4 × DIMM slots, max. 256GB, DDR5
Supports up to 8000+ MT/s (OC) with Ryzen™ 9000 & 8000 & 7000 Series Processors, ECC and Non-ECC un-buffered DIMM
Dual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPO™)
ASUS Enhanced Memory Profile (AEMP)

Graphics
1 × DisplayPort
1 × HDMI™ port

Expansion Slots
AMD Ryzen™ 9000 & 7000 Series Desktop Processors
1 × PCIe 5.0 x16 slot (supports x16 mode)
AMD Ryzen™ 8000 Series Desktop Processors
1 × PCIe 4.0 x16 slot (supports x8/x4 mode)
AMD B850 Chipset
1 × PCIe 4.0 x16 slot (supports x4 mode)

Storage
Supports 3 × M.2 slots and 4 × SATA 6Gb/s ports
AMD Ryzen™ 9000 & 7000 Series Desktop Processors
M.2_1 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode)
M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
AMD Ryzen™ 8000 Series Desktop Processors
M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode)
AMD B850 Chipset
M.2_3 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x2 mode)
4 × SATA 6Gb/s ports

Ethernet
1 × Realtek 2.5Gb Ethernet
ASUS LANGuard

Wireless & Bluetooth
Wi-Fi 6E
2×2 Wi-Fi 6E (802.11ax)
Supports 2.4/5/6GHz frequency band
Bluetooth® v5.3

USB
Rear USB (total 8 ports)
4 × USB 10Gbps ports (3 × Type-A + 1 × USB Type-C®)
2 × USB 5Gbps ports (2 × Type-A)
2 × USB 2.0 ports (2 × Type-A)
Front USB (total 9 ports)
1 × USB 5Gbps connector (supports USB Type-C®)
1 × USB 5Gbps header supporting 2 additional USB 5Gbps ports
3 × USB 2.0 headers supporting 6 additional USB 2.0 ports

Audio
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

Back Panel I/O Ports
1 × USB 10Gbps port (1 × USB Type-C®)
3 × USB 10Gbps ports (3 × Type-A)
2 × USB 5Gbps ports (2 × Type-A)
2 × USB 2.0 ports (2 × Type-A)
1 × DisplayPort
1 × HDMI™ port
1 × Wi-Fi module
1 × Realtek 2.5Gb Ethernet port
3 × audio jacks
1 × BIOS FlashBack™ button

Internal I/O Connectors
Fan and cooling related
1 × 4-pin CPU Fan header
1 × 4-pin CPU OPT Fan header
1 × 4-pin AIO Pump header
4 × 4-pin Chassis Fan headers
Power related
1 × 24-pin Main Power connector
1 × 8-pin +12V CPU Power connector
1 × 4-pin +12V CPU Power connector
Storage related
3 × M.2 slots (Key M)
4 × SATA 6Gb/s ports
USB
1 × USB 5Gbps connector (supports USB Type-C®)
1 × USB 5Gbps header supporting 2 additional USB 5Gbps ports
3 × USB 2.0 headers supporting 6 additional USB 2.0 ports
Miscellaneous
3 × Addressable RGB Gen 2 headers
1 × Clear CMOS header
1 × Chassis Intrusion header
1 × COM Port header
1 × Front Panel Audio header (F_AUDIO)
1 × S/PDIF Out header
1 × SPI TPM header (14-1 pin)
1 × 10-1 pin System Panel header
1 × Thunderbolt™ (USB4®) header

Special Features
ASUS 5X PROTECTION III
DIGI+ VRM
LANGuard
Overvoltage protection
SafeSlot
Stainless-steel back I/O
ASUS Q-Design
Q-Antenna
Q-Dashboard
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
Pre-mounted I/O shield
SafeSlot
Aura Sync with Addressable RGB Gen 2 headers

Software Features
ASUS Exclusive Software
Armoury Crate with Aura Creator, Aura Sync, Fan Xpert 2+, Power Saving
ASUS AI Advisor
ASUS Driver Hub
ASUS GlideX
TurboV Core
ASUS CPU-Z
Norton 360 Deluxe (60 Days Free Trial)
WinRAR (40 Days Free Trial)
UEFI BIOS
ASUS CrashFree BIOS 3
ASUS EZ Flash 3
ASUS UEFI BIOS EZ Mode
ASUS MyHotkey

Remote Management Features
IT Management software supported
ASUS Control Center Express (ACCE)

BIOS
256 Mb Flash ROM, UEFI AMI BIOS

Manageability
WOL by PME, PXE

Accessories
Cables
2 × SATA 6Gb/s cables
Miscellaneous
1 × ASUS WiFi Q-Antenna
1 × M.2 rubber packages
3 × screw packages for M.2 SSD
Documentation
1 × ACC Express Activation Key Card
1 × Quick start guide

Operating System
Windows® 11, Windows® 10 64-bit

Form Factor
ATX Form Factor, 12 inch x 9.6 inch (30.5 cm x 24.4 cm)

3 YEARS WARRANTY 

Avertek Enterprises Pte Ltd
25 Kallang Ave, #03-03,
Singapore 339416
Contact: 6341 7839

Ban Leong Technologies Ltd
150, #04-01 Ubi Ave 4, Ubi Biz-Hub,
Singapore 408825
Contact: 6512 9250

Frequently Asked Questions About ASUS PRIME B850-PLUS WIFI-CSM

Does this motherboard support PCIe 5.0 graphics cards?

Yes, when paired with AMD Ryzen 9000 or 7000 Series processors. The primary PCIe slot runs at 5.0 x16 speeds with these CPUs. With Ryzen 8000 Series processors, it runs at PCIe 4.0 x8/x4 mode instead.

Can I use this board for a gaming PC with a Ryzen 9 9900X?

Absolutely. The B850 chipset handles Ryzen 9 9900X processors well with proper cooling. You get PCIe 5.0 support for GPUs and storage, plus WiFi 6E for low-latency wireless gaming.

What RAM is compatible with this ASUS PRIME B850 motherboard?

It supports DDR5 memory up to 8000+MT/s with overclocking (EXPO profiles). You can install up to 256GB across four DIMM slots. Check ASUS website for the qualified vendor list before purchasing.

Is the 3-year warranty valid in Singapore?

Yes, this comes with a 3-year ASUS Service Center warranty valid in Singapore. Mansa provides direct support, and you can reach us via WhatsApp for any warranty claims or technical questions.

How does this compare to X870 motherboards?

The B850 offers similar core features at lower cost. You get PCIe 5.0 and WiFi 6E like X870 boards, but with fewer USB ports and PCIe lanes from the chipset. Perfect for single-GPU builds.

How long will it take to receive my purchase?

Standard Shipping - 3 to 5 days
Express Shipping - 1 to 2 days

Can I opt for store pickup?

Yes, we are open daily for collection from 11 AM - 6.30 PM.

Address: 1 Ubi View #01-22, Focus One Building Singapore 408555 (Door located nearest to carpark exit gantry)

We will contact you once your order is ready for collection!