{"product_id":"asus-am5-prime-b850-plus-csm","title":"ASUS Prime B850-PLUS-CSM Motherboard, AMD B850, Socket AM5, ATX, 4x DDR5 DIMM, 3x M.2, PCIe 5.0, 2.5GbE, HDMI, DP, USB-C, Ryzen 7000\/8000\/9000","description":"\u003cstyle\u003e\n.pg-wrap{font-family:inherit;font-size:0.95em;}\n.pg-nav{display:flex;gap:0.5em;margin-bottom:1.5em;}\n.pg-nav a{display:inline-block;padding:0.4em 1.2em;border:1px solid #ccc;border-radius:4px;text-decoration:none;color:inherit;font-weight:bold;background:#f5f5f5;}\n.pg-nav a:hover{background:#e0e0e0;}\n.pg-section{margin-bottom:2em;}\n.pg-section h2{font-size:1.3em;font-weight:bold;border-bottom:2px solid #ccc;padding-bottom:0.3em;margin-bottom:0.8em;}\n.pg-cols{display:flex;gap:2em;flex-wrap:wrap;}\n.pg-col{flex:1;min-width:260px;}\n.pg-col h3{font-size:1em;font-weight:bold;background:#f0f0f0;padding:0.3em 0.5em;margin:1em 0 0.3em 0;}\n.pg-col table{width:100%;border-collapse:collapse;font-size:0.9em;}\n.pg-col td{padding:4px 8px;border:1px solid #ddd;vertical-align:top;}\n.pg-col tr:nth-child(even) td{background:#fafafa;}\n.pg-col td:first-child{width:55%;}\nabbr{text-decoration:underline dotted;cursor:help;}\n\u003c\/style\u003e\u003cdiv class=\"pg-wrap\"\u003e\n\u003cdiv class=\"pg-nav\"\u003e\u003ca href=\"#pg-description\"\u003eDescription\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"pg-section\" id=\"pg-description\"\u003e\n\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eASUS Prime B850-PLUS-CSM Motherboard, AMD B850, Socket AM5, ATX, 4x DDR5 DIMM, 3x M.2, PCIe 5.0, 2.5GbE, HDMI, DP, USB-C, Ryzen 7000\/8000\/9000\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eASUS Prime B850-PLUS-CSM Motherboard, AMD B850, Socket AM5, ATX, DDR5, PCIe 5.0 Overview The ASUS Prime B850-PLUS-CSM is an ATX motherboard built on the AMD B850 chipset for Socket AM5, expertly engineered to unleash the full potential of AMD Ryzen 9000, 8000, and 7000 series processors. Designed to be Advanced AI PC-ready, it offers four DDR5 DIMM slots (up to 256GB), three M.2 slots with PCIe 5.0 support, 2.5 Gigabit Ethernet, comprehensive USB connectivity, and a rich internal I\/O header set — all in a standard ATX form factor. AMD Ryzen 7000 \/ 8000 \/ 9000 Series — Socket AM5 The Prime B850-PLUS-CSM supports the full range of AMD Ryzen 7000, 8000, and 9000 series desktop processors via the AM5 socket. The B850 chipset provides a strong feature set for mainstream and enthusiast builds, with PCIe 5.0 for the primary M.2 slot and PCIe 4.0 x16 for the GPU slot. Compatible with Windows 10 x64 and Windows 11. 4x DDR5 DIMM — Up to 256GB, ECC \u0026amp; Non-ECC Four DIMM slots support dual-channel DDR5-SDRAM in both ECC and non-ECC configurations, with a maximum capacity of 256GB. This makes the Prime B850-PLUS-CSM suitable for both consumer and light workstation use cases requiring large memory configurations. 3x M.2 Slots — Primary PCIe 5.0 Three M.2 (M-key) slots provide extensive NVMe storage expansion. The primary M.2 slot supports up to PCIe 5.0 x4 and accepts drives up to 22110mm (110mm length), enabling next-generation NVMe SSDs with sequential reads exceeding 10,000 MB\/s. Four SATA III ports provide additional storage for HDDs and SSDs, with RAID 0, 1, 5, and 10 support. PCIe 4.0 x16 with Passive Cooling One PCIe 4.0 x16 slot accommodates the latest discrete graphics cards. The chipset and VRM heatsinks use passive cooling for silent operation. Three RGB LED pin headers allow full lighting customisation. 2.5 Gigabit Ethernet \u0026amp; Audio Onboard 2.5 Gigabit Ethernet provides fast wired networking. The onboard audio delivers 7.1-channel surround sound. No Wi-Fi onboard. Rear I\/O 2x USB 2.0 Type-A, 2x USB 3.2 Gen 1 Type-A (5Gbps), 3x USB 3.2 Gen 2 Type-A (10Gbps), 1x USB 3.2 Gen 2 Type-C (10Gbps), 1x HDMI, 1x DisplayPort, 1x RJ-45 (2.5GbE), audio jacks (7.1-channel). Internal I\/O Headers 2x USB 2.0 headers, 2x USB 3.2 Gen 1 headers, 4x SATA III, 1x CPU fan, 4x chassis fan, 1x water pump, 1x Thunderbolt header, 1x COM port, 3x RGB LED headers, front panel audio, 24-pin ATX power, 8-pin EPS CPU power. BIOS UEFI AMI BIOS with 256Mbit ROM. Supports EXPO memory profiles for easy DDR5 overclocking, BIOS FlashBack, and AI-assisted tuning features for the Advanced AI PC platform. Processor \u0026amp; Chipset Chipset AMD B850 Socket AM5 CPU Support AMD Ryzen 7000 \/ 8000 \/ 9000 Series Form Factor ATX (305 x 244mm) Colour Multicolour Cooling Passive Memory Type DDR5-SDRAM (ECC \u0026amp; Non-ECC) Slots 4x DIMM Channels Dual-channel Max Capacity 256GB Expansion Slots PCIe x16 1x PCIe 4.0 x16 M.2 Slots 3x M.2 (M-key); primary: PCIe 5.0, up to 22110mm Storage SATA III 4x (supports up to 4 HDDs \/ 7 drives total) RAID 0, 1, 5, 10 Networking LAN 2.5 Gigabit Ethernet (1x RJ-45) Wi-Fi No Rear I\/O Display 1x HDMI, 1x DisplayPort USB 2.0 2x Type-A USB 3.2 Gen 1 2x Type-A (5Gbps) USB 3.2 Gen 2 3x Type-A + 1x Type-C (10Gbps) Audio 7.1-channel Internal I\/O USB 2.0 Headers 2x USB 3.2 Gen 1 Headers 2x SATA III 4x Fan Headers 1x CPU, 4x chassis, 1x water pump RGB Headers 3x Thunderbolt Header 1x COM Port 1x BIOS \u0026amp; OS BIOS UEFI AMI, 256Mbit OS Support Windows 10 x64, Windows 11\u003c\/p\u003e\n\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"ASUS","offers":[{"title":"Default Title","offer_id":56815803957579,"sku":"90MB1LC0-M0EAYC","price":185.13,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0938\/7455\/3163\/files\/ASUS_90MB1LC0-M0EAYC_INT_1.jpg?v=1778945405","url":"https:\/\/pcgear.uk\/products\/asus-am5-prime-b850-plus-csm","provider":"PC Gear UK","version":"1.0","type":"link"}