ASUS PRIME B850-PLUS-CSM ATX Motherboard
£147.89 inc VAT
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About This Item
- AMD B850 chipset with Socket AM5 for AMD Ryzen 7000/8000/9000 series
- Supports up to 256 GB DDR5 memory across 4 DIMM slots
- 3 M.2 slots with PCIe 5.0 support for high-speed storage
- 7.1 channel audio with passive cooling for quiet operation
- 2.5 Gigabit Ethernet and USB 3.2 Gen 2 Type-C for fast connectivity
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ASUS PRIME B850-PLUS-CSM | AMD B850 Socket AM5 ATX Motherboard
The ASUS PRIME B850-PLUS-CSM AMD B850 Socket AM5 ATX is a feature-rich motherboard designed for AMD Ryzen 9000 series processors. Built on the AMD B850 chipset, it delivers robust performance, extensive connectivity, and AI-ready capabilities for demanding applications.
Key Specifications
| Metric | Spec |
|---|---|
| Processor Socket | AM5 |
| Memory Support | DDR5, up to 256 GB |
| PCIe Slots | 1 x PCIe 4.0 x16 |
| M.2 Slots | 3 x M.2 (PCIe 5.0 supported) |
| Ethernet | 2.5 Gigabit |
AI-Ready Performance for Demanding Applications
The ASUS PRIME B850-PLUS-CSM is engineered to support advanced AI workloads and multitasking. With support for AMD Ryzen 7000, 8000, and 9000 series processors, it delivers the processing power needed for AI-driven applications. The motherboard’s dual-channel DDR5 memory architecture ensures fast data access, while the PCIe 5.0 M.2 slots provide ultra-fast storage speeds for large datasets.
Comprehensive Storage and Expansion Options
Storage flexibility is a key strength of this motherboard. It supports up to seven storage drives through a combination of M.2 slots and SATA III connectors. The three M.2 slots include PCIe 5.0 support for the fastest NVMe SSDs, while four SATA III ports accommodate additional SSDs or HDDs. RAID 0, 1, 5, and 10 configurations are available for data protection and performance optimization.
Advanced Connectivity and Cooling
Connectivity options are extensive, with USB 3.2 Gen 2 Type-A and Type-C ports for high-speed peripherals. The 2.5 Gigabit Ethernet ensures reliable network performance for gaming and content creation. For cooling, the motherboard features four chassis fan headers and dedicated CPU and water pump connectors, allowing for precise thermal management of high-performance components.
Box Contents
- ASUS PRIME B850-PLUS-CSM motherboard
- I/O shield
- User manual
- SATA cables
- M.2 screws
- Warranty card
Check before you buy
- Confirm your AMD Ryzen processor is compatible with Socket AM5
- Verify your case supports ATX form factor (305 x 244 mm)
- Check if your power supply has a 24-pin ATX and 8-pin EPS connector
- Confirm your RAM is DDR5 and fits within the 256 GB maximum capacity
Frequently Asked Questions
Q: Does this motherboard support Wi-Fi?
A: No, the ASUS PRIME B850-PLUS-CSM does not include built-in Wi-Fi. You’ll need a separate Wi-Fi adapter if wireless connectivity is required.
Q: What processors are compatible with this motherboard?
A: It supports AMD Ryzen 7000, 8000, and 9000 series processors that use the AM5 socket.
Q: How many graphics cards can I install?
A: The motherboard has one PCIe 4.0 x16 slot, supporting a single graphics card.
Q: Does it support ECC memory?
A: Yes, the motherboard supports both ECC and non-ECC DDR5 memory modules.
Q: What is the maximum memory capacity?
A: The motherboard supports up to 256 GB of DDR5 memory across four DIMM slots.
The Consultant’s verdict & warranty
The ASUS PRIME B850-PLUS-CSM AMD B850 Socket AM5 ATX motherboard offers excellent value for users building systems around AMD’s latest Ryzen processors. Its combination of AI-ready performance, extensive storage options, and robust connectivity makes it suitable for gamers, content creators, and professionals working with demanding applications. Covered by the standard Manufacturer Warranty, this motherboard represents a solid foundation for a high-performance PC build.
| Internal I/O | |
|---|---|
| Number of M.2 (M) slots | 3 |
| Thunderbolt headers | 1 |
| 12V power connector | Yes |
| Supported storage drive interfaces | M.2, SATA III |
| USB 2.0 connectors | 2 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 2 |
| S/PDIF out connector | Yes |
| Number of SATA III connectors | 4 |
| Number of COM connectors | 1 |
| Number of chassis fan connectors | 4 |
| Front panel audio connector | Yes |
| EPS power connector (8-pin) | Yes |
| CPU fan connector | Yes |
| Chassis intrusion connector | Yes |
| ATX Power connector (24-pin) | Yes |
| RGB LED pin header | Yes |
| Number of CPU fan connectors | 1 |
| Number of water pump connectors | 1 |
| Number of RGB LED pin headers | 3 |
| Technical details | |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD B850 |
| Parallel processing technology support | Not supported |
| Cooling type | Passive |
| Motherboard form factor | ATX |
| Component for | PC |
| Audio | |
| Audio output channels | 7.1 channels |
| Performance | |
| Number of HDDs supported | 4 |
| Supported storage drive types | HDD & SSD |
| Windows operating systems supported | Windows 10 x64, Windows 11 |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD B850 |
| RAID levels | 0, 1, 5, 10 |
| Cooling type | Passive |
| Audio output channels | 7.1 channels |
| Motherboard form factor | ATX |
| Component for | PC |
| Processor | |
| Processor manufacturer | AMD |
| Compatible processor series | AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series |
| Processor socket | Socket AM5 |
| Memory | |
| Number of memory slots | 4 |
| Memory slots type | DIMM |
| Supported memory types | DDR5-SDRAM |
| Memory channels | Dual-channel |
| Maximum internal memory | 256 GB |
| Unbuffered memory | Yes |
| ECC сompatibility | ECC & Non-ECC |
| Storage controllers | |
| Number of HDDs supported | 4 |
| Supported storage drive types | HDD & SSD |
| Supported storage drive interfaces | M.2, SATA III |
| RAID levels | 0, 1, 5, 10 |
| Number of storage drives supported | 7 |
| RAID support | Yes |
| Graphics | |
| Parallel processing technology support | Not supported |
| Rear panel I/O ports | |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 2 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 3 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 1 |
| USB connector type | USB Type-A, USB Type-C |
| USB 2.0 ports quantity | 2 |
| Microphone in | Yes |
| HDMI ports quantity | 1 |
| Ethernet LAN (RJ-45) ports | 1 |
| DisplayPorts quantity | 1 |
| Line-in | Yes |
| Network | |
| Ethernet LAN | Yes |
| Wi-Fi | No |
| Ethernet interface type | 2.5 Gigabit Ethernet |
| Features | |
| Windows operating systems supported | Windows 10 x64, Windows 11 |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD B850 |
| Cooling type | Passive |
| Audio output channels | 7.1 channels |
| Motherboard form factor | ATX |
| Component for | PC |
| Product colour | Multicolour |
| Expansion slots | |
| Number of M.2 (M) slots | 3 |
| PCI Express x16 (Gen 4.x) slots | 1 |
| 1st M.2 largest key size | 22110 |
| 1st M.2 highest PCI Express generation | 5.0 |
| BIOS | |
| BIOS type | UEFI AMI |
| BIOS memory size | 256 Mbit |
| Packaging data | |
| Package width | 353 mm |
| Package depth | 273 mm |
| Package height | 68 mm |
| Package weight | 1.24 kg |
| Software | |
| Windows operating systems supported | Windows 10 x64, Windows 11 |
| Weight & dimensions | |
| Height | 48 mm |
| Package width | 353 mm |
| Package depth | 273 mm |
| Package height | 68 mm |
| Package weight | 1.24 kg |
| Weight | 1.03 kg |
| Width | 305 mm |
| Depth | 244 mm |
| Other features | |
| Height | 48 mm |
| Package width | 353 mm |
| Package depth | 273 mm |
| Package height | 68 mm |
| Package weight | 1.24 kg |
| Weight | 1.03 kg |
| Identifiers | |
| Distributor SKUs | MBD-90MB1LC0-M0EAYC, 11808591, 127948, 561435, STD10225166, M2MMBD-90MB1LC0-M0EAYC |
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