{"data":{"slug":"msi-pro-b850m-a-wifi","type":"motherboard","brand":"MSI","name":"PRO B850M-A WIFI","aliases":["B850M-A WIFI","MSI PRO B850M-A WiFi"],"release_date":"2025-06","url":"https://arkivo.dev/motherboards/msi-pro-b850m-a-wifi","specs":{"series":"PRO","model_numbers":["PRO B850M-A WIFI"],"gtins":["824142425459"],"announce_date":"2025-01-06","status":"available","predecessor":null,"successor":null,"launch_price_usd":null,"launch_price_eur":null,"markets":null,"colors":null,"manufacturer_url":"https://www.msi.com/Motherboard/PRO-B850M-A-WIFI","spec_sheet_url":"https://storage-asset.msi.com/datasheet/mb/in/PRO-B850M-A-WIFI.pdf","manual_url":"https://static.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdf","eprel_registration_number":null,"warranty_years":3,"segment":"mainstream","board_revision":null,"cpu_socket":"AM5","motherboard_chipset":"AMD B850","supported_cpu_series":["AMD Ryzen 9000 Series","AMD Ryzen 8000 Series","AMD Ryzen 7000 Series"],"cpu_overclocking":true,"motherboard_form_factor":"micro_atx","dimensions_mm":{"width_mm":244,"height_mm":244},"pcb_layers":6,"back_connect_design":false,"rgb_lighting":false,"vrm_layout":"8+2+1","vrm_vcore_power_stages":8,"vrm_vcore_stage_rating_a":60,"vrm_controller":"Richtek RT3678BE","cpu_power_connectors":"8+4 pin","supplemental_pcie_power":true,"ram_type":"ddr5","ram_slot_count":4,"ram_max_gb":256,"ram_max_speed_mts":8200,"ram_ecc":false,"cudimm_support":false,"expansion_slots":[{"slot_type":"pcie_x16","electrical_lanes":16,"pcie_gen":5,"connected_to":"cpu","count":1},{"slot_type":"pcie_x16","electrical_lanes":4,"pcie_gen":4,"connected_to":"chipset","count":1},{"slot_type":"pcie_x1","electrical_lanes":1,"pcie_gen":3,"connected_to":"chipset","count":1}],"pcie_x16_slot_count":2,"pcie_x16_gen_max":5,"m2_slots":[{"slot":"M2_1","pcie_gen":5,"pcie_lanes":4,"connected_to":"cpu","form_factor":"m2_2280","sata":false,"heatsink":true,"shares_lanes_with":null},{"slot":"M2_2","pcie_gen":4,"pcie_lanes":4,"connected_to":"cpu","form_factor":"m2_2280","sata":false,"heatsink":false,"shares_lanes_with":null}],"m2_slot_count":2,"m2_pcie5_slot_count":1,"sata_port_count":4,"rear_ports":[{"type":"usb_c","version":"USB 3.2 Gen 2","count":2,"max_gbps":10,"tb_usb4":null,"power_out_w":null,"dp_alt_mode":null},{"type":"usb_a","version":"USB 3.2 Gen 2","count":3,"max_gbps":10,"tb_usb4":null,"power_out_w":null,"dp_alt_mode":null},{"type":"usb_a","version":"USB 3.2 Gen 1","count":3,"max_gbps":5,"tb_usb4":null,"power_out_w":null,"dp_alt_mode":null},{"type":"hdmi","version":"HDMI 2.1","count":1,"max_gbps":null,"tb_usb4":null,"power_out_w":null,"dp_alt_mode":null},{"type":"displayport","version":"DisplayPort 1.4","count":1,"max_gbps":null,"tb_usb4":null,"power_out_w":null,"dp_alt_mode":null},{"type":"rj45","version":null,"count":1,"max_gbps":5,"tb_usb4":null,"power_out_w":null,"dp_alt_mode":null},{"type":"audio_3_5mm","version":null,"count":3,"max_gbps":null,"tb_usb4":null,"power_out_w":null,"dp_alt_mode":null}],"rear_usb_count":8,"rear_usb_c_count":2,"rear_usb_max_gbps":10,"has_thunderbolt":null,"usb_headers":[{"connector":"usb_c","max_gbps":10,"count":1,"ports":1,"power_out_w":null},{"connector":"usb_3","max_gbps":5,"count":1,"ports":2,"power_out_w":null},{"connector":"usb_2","max_gbps":0.48,"count":2,"ports":4,"power_out_w":null}],"usb_c_header_max_gbps":10,"fan_header_count":5,"argb_header_count":3,"rgb_header_count":1,"ethernet_controllers":["Realtek RTL8126"],"ethernet_port_count":1,"ethernet_max_gbps":5,"wifi":true,"wifi_standard":"wifi_7","wifi_bands":["2.4ghz","5ghz","6ghz"],"wifi_max_channel_width_mhz":160,"wifi_module":null,"bluetooth_version":"5.4","audio_codec":"Realtek ALC897","dac_chip":null,"bios_flashback":true,"clear_cmos_button":true,"post_code_display":false,"onboard_power_button":null,"dual_bios":false,"preinstalled_io_shield":true,"tool_free_features":["m2_latch","m2_heatsink","pcie_release"],"measured_vrm_temp_c":null,"measured_power_idle_w":null,"measured_power_cpu_stress_w":null,"in_the_box":["1x Motherboard","1x Quick installation guide","1x European Union Regulatory Notices","1x SATA cable","1 x 1 to 2 EZ Conn-Cable (V1)","1x EZ Wi-Fi Antenna","2x EZ M.2 Clip II","1x EZ M.2 Clip II Remover"]},"variants":[],"sources":[{"url":"https://static.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdf","kind":"manual","accessed":"2026-10-14","fields":["manual_url","series","model_numbers","cpu_socket","motherboard_chipset","supported_cpu_series","cpu_overclocking","motherboard_form_factor","dimensions_mm","back_connect_design","rgb_lighting","cpu_power_connectors","supplemental_pcie_power","ram_type","ram_slot_count","ram_max_gb","ram_ecc","cudimm_support","expansion_slots","m2_slots","sata_port_count","rear_ports","usb_headers","fan_header_count","argb_header_count","rgb_header_count","ethernet_controllers","wifi","wifi_standard","wifi_bands","wifi_max_channel_width_mhz","bluetooth_version","audio_codec","bios_flashback","clear_cmos_button","post_code_display","dual_bios","preinstalled_io_shield","tool_free_features","in_the_box","release_date"],"notes":{"manual_url":"MSI User Guide for PRO B850M-A WIFI (66 pages), hosted by buildcores.com. msi.com blocks agents, so the maker's own copy was not opened.","series":"Cover: PRO Series Motherboard, PRO B850M-A WIFI.","model_numbers":"The manual names only PRO B850M-A WIFI. The PRO B850M-A WIFI PZ back-connect board is a separate MSI model. No order code or regional model number was found.","supported_cpu_series":"Specifications, CPU row: AMD Ryzen 9000/8000/7000 Series Desktop Processors, socket AM5. The manual points to msi.com for the newest support list. Read on 2026-10-14.","cpu_overclocking":"Page 29 says the board is designed to support overclocking. The Special Features list names Core Boost and Memory Boost. The B850 chipset allows CPU overclocking. AMD's chipset page could not be opened on 2026-10-14.","motherboard_form_factor":"Specifications, Form Factor row: mATX, 9.6 in. x 9.6 in. (244 mm x 244 mm).","dimensions_mm":"Specifications: 244 mm x 244 mm. Guru3D, Netcodex and the MSI Taiwan store give 243.84 mm, the exact conversion of 9.6 in.","back_connect_design":"The component overview on page 27 shows the usual front-side power, fan and front-panel connectors. The back-connect board is the separate PRO B850M-A WIFI PZ.","rgb_lighting":"Specifications, LED Features: 4x EZ Debug LED, 1x EZ Memory Detection LED and the RGB and ARGB headers. The list names no lighting on the board itself. BuildCores shows Lighting: None.","cpu_power_connectors":"Specifications, Power Connectors: 1x 24-pin ATX, 1x 8-pin +12V, 1x 4-pin +12V and 1x 8-pin PCIe power connector.","supplemental_pcie_power":"Specifications and page 41: PCIE_PWR1, an 8-pin PCIe power connector. The Special Features list names it Supplemental PCIe Power Connector.","ram_type":"Specifications, Memory row: 4x DDR5 memory slots, supporting up to 256GB, dual channel. The slots have a single latch.","ram_ecc":"Specifications: Supports Non-ECC, Un-buffered memory.","cudimm_support":"Specifications: Supports CUDIMM, Clock Driver bypass mode only.","expansion_slots":"Specifications and page 32: 2x PCIe x16 slots and 1x PCIe x1 slot. PCI_E1 is from the CPU, PCIe 5.0 x16 with Ryzen 9000 and 7000. It runs PCIe 4.0 x8 with Ryzen 8700, 8600 and 8400, and PCIe 4.0 x4 with Ryzen 8500 and 8300. PCI_E3 is a x16 slot from the B850 chipset, up to PCIe 4.0 x4. PCI_E2 is the x1 slot from the chipset, up to PCIe 3.0 x1. Guru3D also writes the second slot as PCIe 4.0 x4 in x16 physical size.","m2_slots":"Specifications and pages 33 to 37, Ryzen 9000 values. M2_1 is from the CPU, up to PCIe 5.0 x4 (PCIe 4.0 x4 with Ryzen 8000), 2260 and 2280 drives, under the screwless EZ M.2 Shield Frozr II heatsink. M2_2 is from the CPU, up to PCIe 4.0 x4 (PCIe 4.0 x2 with Ryzen 8500 and 8300), 2260 and 2280 drives. The M2_2 install steps show a clip and no heatsink. MaxMyBuild and Geizhals agree that only one M.2 slot has a heatsink. No slot lists an M.2 SATA mode, so sata is false. The Wi-Fi module sits in a separate M.2 Key-E slot.","sata_port_count":"Specifications: 4x SATA 6Gb/s ports from the B850 chipset.","rear_ports":"Specifications and pages 19 and 23: 3x USB 10Gbps Type-A (CPU), 2x USB 10Gbps Type-C (B850 chipset), 3x USB 5Gbps Type-A (B850 chipset), 1x DisplayPort 1.4, 1x HDMI 2.1, 1x 5G LAN (RJ45) and 3 audio jacks (line-in, line-out, mic-in). The MSI datasheet agrees. MSI's speed names are stored as USB-IF names: 5Gbps as USB 3.2 Gen 1 and 10Gbps as Gen 2. DisplayPort and HDMI work only with a CPU that has integrated graphics, 4K 60 Hz. The manual gives no USB power output or DisplayPort alt mode figures. The two Wi-Fi antenna connectors and the Clear CMOS and Flash BIOS buttons are not ports.","usb_headers":"Specifications and pages 43 and 44: JUSBC1 is 1x USB 10Gbps Type-C front port. JUSB3 is one 5Gbps connector for 2 ports. JUSB1 and JUSB2 are two USB 2.0 connectors for 4 ports.","fan_header_count":"Specifications: 1x 4-pin CPU fan, 1x 4-pin water-pump/system fan and 3x 4-pin system fan connectors. The 7-pin EZ Conn connector carries a fan and ARGB together and is not counted.","argb_header_count":"Specifications: 3x 3-pin A-RAINBOW V2 (ARGB Gen2) LED connectors.","rgb_header_count":"Specifications: 1x 4-pin RGB LED connector (JRGB1).","ethernet_controllers":"Specifications: 1x Realtek 8126 5Gbps LAN controller. Retailer listings and Geizhals add the suffix VB, which is left out.","wifi":"Specifications: the wireless module is pre-installed in the M.2 (Key-E) slot. This applies to PRO B850M-A WIFI only.","wifi_standard":"Specifications: 802.11 a/b/g/n/ac/ax/be.","wifi_bands":"Specifications: 2.4GHz/5GHz/6GHz. 6 GHz may depend on each country's regulations.","wifi_max_channel_width_mhz":"Specifications: MU-MIMO TX/RX, 2.4GHz/5GHz/6GHz (160MHz) up to 2.9Gbps.","bluetooth_version":"Specifications: Bluetooth 5.4, MLO, 4KQAM. The version may be updated by the Wi-Fi chipset vendor.","audio_codec":"Specifications, Audio row: Realtek ALC897 Codec, 7.1-channel High Definition Audio. Geizhals and Netcodex say the same.","bios_flashback":"Specifications and page 23: Flash BIOS button on the rear panel, with a Flash BIOS port (USB 10Gbps Type-A).","clear_cmos_button":"Specifications and page 23: Clear CMOS button on the rear panel. JBAT1 is a second jumper.","post_code_display":"Specifications, LED Features: 4x EZ Debug LED and 1x EZ Memory Detection LED. They are single status LEDs and the manual lists no two-digit display.","dual_bios":"Specifications, BIOS Features: 1x 256 Mb flash. Dual BIOS is not stated.","preinstalled_io_shield":"Special Features, EZ DIY: Pre-installed I/O Shield.","tool_free_features":"Special Features, EZ DIY: EZ M.2 Shield Frozr II (screwless M2_1 heatsink, pages 34 to 36), EZ M.2 Clip II (locks the SSD without a screw) and EZ PCIe Clip II (release for the graphics card). The Wi-Fi antenna cables are screwed on (page 26), so antenna_connector is not stored.","in_the_box":"Package Contents, page 22.","release_date":"Revision history: Version 2.0, 2025/06, First release."}},{"url":"https://storage-asset.msi.com/datasheet/mb/in/PRO-B850M-A-WIFI.pdf","kind":"manufacturer_pdf","accessed":"2026-10-14","fields":["spec_sheet_url","segment","ram_max_speed_mts"],"notes":{"spec_sheet_url":"One-page MSI datasheet for PRO B850M-A WIFI, generated 2025-10-31, on MSI's datasheet server.","segment":"The datasheet cover carries the tagline Business and Elegance, and the board sits in MSI's PRO series. MSI names no gaming or creator use.","ram_max_speed_mts":"Memory Support: 4 DIMMs, Dual Channel DDR5 - 8200+ MT/s (OC). The maker names no CPU family and no module setup for the figure. The MSI Malaysia store and the Taiwan store say the same. The JEDEC range is 5600 to 4800 MT/s."}},{"url":"https://my-store.msi.com/products/msi-pro-b850m-a-wifi-matx-motherboard","kind":"manufacturer_page","accessed":"2026-10-14","fields":["warranty_years","pcb_layers","vrm_layout","vrm_vcore_stage_rating_a","cpu_power_connectors","release_date"],"notes":{"warranty_years":"MSI Malaysia store: 3 years limited warranty. Geizhals says 3 years too.","pcb_layers":"Product details: 6-layer PCB made by 2oz thickened copper and server-grade level material.","vrm_layout":"Product details: Direct 8+2+1 Power System 60A SPS, 8+4-pin CPU power connectors.","vrm_vcore_stage_rating_a":"Direct 8+2+1 Power System 60A SPS.","cpu_power_connectors":"8+4-pin CPU power connectors.","release_date":"The store's product feed lists the board as created on 2025-07-18, in Malaysia."}},{"url":"https://tw-store.msi.com/products/pro-b850m-a-wifi","kind":"manufacturer_page","accessed":"2026-10-14","fields":["pcb_layers","vrm_layout"],"notes":{"pcb_layers":"The Chinese text says a 6-layer server-grade PCB with 2oz copper. One search result summary of MSI's global page mentioned 8 layers, which no maker page or document confirmed.","vrm_layout":"Text names an 8+2+1 Duet Rail power system with dual 8+4-pin CPU power connectors."}},{"url":"https://www.msi.com/Motherboard/PRO-B850M-A-WIFI","kind":"manufacturer_page","accessed":"2026-10-14","fields":["manufacturer_url"],"notes":{"manufacturer_url":"The URL comes from the job evidence and search results. msi.com blocks agents, so the page was not opened. Specifications were read from the user guide, the datasheet and MSI's regional stores."}},{"url":"https://www.club386.com/msi-launches-mid-and-entry-motherboards-for-amds-am5-platform","kind":"press","accessed":"2026-10-14","fields":["announce_date","release_date","vrm_layout","vrm_vcore_stage_rating_a","pcb_layers"],"notes":{"announce_date":"Article of 2025-01-06 announces the Pro B850M-A WiFi with the MSI B850 lineup.","release_date":"The article gives no availability date. The user guide dates to 2025/06 and Guru3D gives 2025-07-02 for sale.","vrm_layout":"MSI's launch text through Club386: 8+2+1 phases rated at 60A.","vrm_vcore_stage_rating_a":"8+2+1 phases rated at 60A.","pcb_layers":"Six-layer PCB."}},{"url":"https://www.guru3d.com/story/msi-pro-b850ma-wifi-microatx-motherboard-with-wifi-7-and-5-gigabit-lan/","kind":"press","accessed":"2026-10-14","fields":["release_date","vrm_layout","vrm_vcore_stage_rating_a"],"notes":{"release_date":"Article of 2025-06-27: the board is scheduled for sale from 2025-07-02. The article gives an estimated price of about 27,980 yen and calls it roughly 199 USD in a spec table. No US launch price is stated, so none is stored. The month is approximate.","vrm_layout":"8+2+1 phase design with 60A smart power stages.","vrm_vcore_stage_rating_a":"60A smart power stages."}},{"url":"https://geizhals.de/msi-pro-b850m-a-wifi-a3383558.html","kind":"spec_database","accessed":"2026-10-14","fields":["vrm_vcore_power_stages","vrm_controller","warranty_years","status"],"notes":{"vrm_vcore_power_stages":"VRM row: 8+2+1, 8x 60 A MP87661 smart power stages for VCORE, 2 for SOC and 1 for misc.","vrm_controller":"PWM controller row: RT3678BE (max 10 phases) and RT3672EE (max 2 phases). Geizhals names no maker. The RT3678 family is Richtek's. The Vcore controller is stored. No review names a controller, and this is one aggregator.","warranty_years":"Warranty 3 Jahre.","status":"Listed with offers on geizhals.eu on 2026-10-14. The base page showed no offers in one snapshot. BuildCores shows it in stock at Newegg and Walmart."}},{"url":"https://www.buildcores.com/products/Motherboard/ys4ci1k5t/MSI-PRO-B850M-A-WIFI","kind":"spec_database","accessed":"2026-10-14","fields":["gtins","status","rgb_lighting"],"notes":{"rgb_lighting":"Lighting: none listed. The headers are for external devices.","gtins":"UPC 824142425459, also shown as EAN 0824142425459. The PZ board has its own code.","status":"Shows Newegg at 168.99 USD and Walmart at 172.99 USD in stock on 2026-10-14."}},{"url":"https://www.maxmybuild.com/motherboards/msi-pro-b850m-a-wifi","kind":"spec_database","accessed":"2026-10-14","fields":["m2_slots","vrm_layout"],"notes":{"m2_slots":"M.2 heatsinks: slot 1 only.","vrm_layout":"8+2+1 power stage layout, 60A SPS."}}],"fields_filled":63,"updated":"2026-10-16"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}