{"data":{"slug":"asus-prime-b840-plus-wifi","type":"motherboard","brand":"ASUS","name":"PRIME B840-PLUS WIFI","aliases":["B840-PLUS WIFI","PRIME B840-PLUS WIFI","Prime B840-Plus WiFi"],"release_date":"2025-01","url":"https://arkivo.dev/motherboards/asus-prime-b840-plus-wifi","specs":{"series":"PRIME","model_numbers":["PRIME B840-PLUS WIFI","90MB1IZ0-M0EAY0","90MB1IZ0-M0AAY0"],"gtins":["4711387797273","197105797277"],"announce_date":"2025-01-06","status":"available","predecessor":null,"successor":null,"launch_price_usd":null,"launch_price_eur":239,"markets":null,"colors":null,"manufacturer_url":"https://www.asus.com/motherboards-components/motherboards/prime/prime-b840-plus-wifi/","spec_sheet_url":"https://www.asus.com/motherboards-components/motherboards/prime/prime-b840-plus-wifi/techspec/","manual_url":"https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM5/PRIME_B840-PLUS_WIFI/E24443_PRIME_B840-PLUS_WIFI_EM_WEB.pdf","eprel_registration_number":null,"warranty_years":3,"segment":"mainstream","board_revision":null,"cpu_socket":"AM5","motherboard_chipset":"AMD B840","supported_cpu_series":["AMD Ryzen 9000 Series","AMD Ryzen 8000 Series","AMD Ryzen 7000 Series"],"cpu_overclocking":false,"motherboard_form_factor":"atx","dimensions_mm":{"width_mm":244,"height_mm":305},"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":null,"vrm_controller":null,"cpu_power_connectors":"8+4 pin","supplemental_pcie_power":false,"ram_type":"ddr5","ram_slot_count":4,"ram_max_gb":256,"ram_max_speed_mts":7600,"ram_ecc":true,"cudimm_support":null,"expansion_slots":[{"slot_type":"pcie_x16","electrical_lanes":16,"pcie_gen":4,"connected_to":"cpu","count":1},{"slot_type":"pcie_x16","electrical_lanes":4,"pcie_gen":3,"connected_to":"chipset","count":1},{"slot_type":"pcie_x16","electrical_lanes":1,"pcie_gen":3,"connected_to":"chipset","count":2},{"slot_type":"pcie_x1","electrical_lanes":1,"pcie_gen":3,"connected_to":"chipset","count":1}],"pcie_x16_slot_count":4,"pcie_x16_gen_max":4,"m2_slots":[{"slot":"M.2_1","pcie_gen":4,"pcie_lanes":4,"connected_to":"cpu","form_factor":"m2_2280","sata":false,"heatsink":true,"shares_lanes_with":null},{"slot":"M.2_2","pcie_gen":4,"pcie_lanes":4,"connected_to":"cpu","form_factor":"m2_2280","sata":false,"heatsink":false,"shares_lanes_with":null},{"slot":"M.2_3","pcie_gen":3,"pcie_lanes":4,"connected_to":"chipset","form_factor":"m2_2280","sata":false,"heatsink":false,"shares_lanes_with":null}],"m2_slot_count":3,"m2_pcie5_slot_count":0,"sata_port_count":4,"rear_ports":[{"type":"usb_c","version":"USB 3.2 Gen 2","count":1,"max_gbps":10,"tb_usb4":null,"power_out_w":null,"dp_alt_mode":null},{"type":"usb_a","version":"USB 3.2 Gen 2","count":1,"max_gbps":10,"tb_usb4":null,"power_out_w":null,"dp_alt_mode":null},{"type":"usb_a","version":"USB 3.2 Gen 1","count":2,"max_gbps":5,"tb_usb4":null,"power_out_w":null,"dp_alt_mode":null},{"type":"usb_a","version":"USB 2.0","count":4,"max_gbps":0.48,"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":"hdmi","version":"HDMI 2.1","count":1,"max_gbps":null,"tb_usb4":null,"power_out_w":null,"dp_alt_mode":null},{"type":"rj45","version":null,"count":1,"max_gbps":2.5,"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":1,"rear_usb_max_gbps":10,"has_thunderbolt":null,"usb_headers":[{"connector":"usb_c","max_gbps":5,"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":5,"fan_header_count":7,"argb_header_count":3,"rgb_header_count":0,"ethernet_controllers":["Realtek RTL8125"],"ethernet_port_count":1,"ethernet_max_gbps":2.5,"wifi":true,"wifi_standard":"wifi_6e","wifi_bands":["2.4ghz","5ghz","6ghz"],"wifi_max_channel_width_mhz":null,"wifi_module":"MediaTek MT7922","bluetooth_version":"5.3","audio_codec":"Realtek ALC897","dac_chip":null,"bios_flashback":true,"clear_cmos_button":false,"post_code_display":false,"onboard_power_button":false,"dual_bios":false,"preinstalled_io_shield":true,"tool_free_features":["antenna_connector"],"measured_vrm_temp_c":null,"measured_power_idle_w":null,"measured_power_cpu_stress_w":null,"in_the_box":["2 x SATA 6Gb/s cables","1 x ASUS WiFi Q-Antenna","1 x M.2 rubber package","3 x Screw packages for M.2 SSD","1 x Quick start guide"]},"variants":[],"sources":[{"url":"https://www.asus.com/motherboards-components/motherboards/prime/prime-b840-plus-wifi/techspec/","kind":"manufacturer_page","accessed":"2026-10-15","fields":["spec_sheet_url","model_numbers","segment","cpu_socket","motherboard_chipset","supported_cpu_series","motherboard_form_factor","dimensions_mm","cpu_power_connectors","supplemental_pcie_power","ram_type","ram_slot_count","ram_max_gb","ram_max_speed_mts","ram_ecc","expansion_slots","m2_slots","sata_port_count","rear_ports","usb_headers","fan_header_count","argb_header_count","rgb_header_count","rgb_lighting","wifi","wifi_standard","wifi_bands","bluetooth_version","bios_flashback","clear_cmos_button","post_code_display","onboard_power_button","dual_bios","preinstalled_io_shield","tool_free_features","in_the_box","back_connect_design"],"notes":{"model_numbers":"The page names the model PRIME B840-PLUS WIFI. The part numbers 90MB1IZ0-M0EAY0 (Scan UK, the Spanish datasheet) and 90MB1IZ0-M0AAY0 (BuildCores) are from retail sources. The -CSM business version is a separate product.","segment":"ASUS PRIME is not a gaming, creator or workstation line, so the segment is mainstream.","supported_cpu_series":"AM5 for AMD Ryzen 9000, 8000 and 7000 Series Desktop Processors. The page refers to the ASUS download center for the CPU support list. Read on 2026-10-15.","motherboard_form_factor":"ATX form factor, 12 inch x 9.6 inch (30.5 cm x 24.4 cm).","dimensions_mm":"ATX form factor, 12 inch x 9.6 inch (30.5 cm x 24.4 cm).","cpu_power_connectors":"Internal connectors: 1 x 8-pin +12V CPU power connector, 1 x 4-pin +12V CPU power connector and the 24-pin main power connector.","supplemental_pcie_power":"The internal connector list has no extra slot power connector.","ram_type":"4 x DIMM slots, DDR5, dual channel.","ram_max_gb":"The page says max. 256GB. The December 2024 manual says max. 192GB, and retailers copy 192 GB. The page wins as the newer maker statement.","ram_max_speed_mts":"Up to 7600+ MT/s (OC) with Ryzen 9000, 8000 and 7000 Series. The Ryzen 9000 value is stored. The page says supported speeds and module counts vary with the CPU and memory configuration. No other CPU or module setup is listed.","ram_ecc":"The page lists ECC and non-ECC unbuffered DIMM, and says non-ECC DDR5 supports On-Die ECC. The maker does not say how ECC works with each CPU. A list of ECC and non-ECC modules with no qualifier counts as true.","expansion_slots":"Ryzen 9000 and 7000: 1 x PCIe 4.0 x16 slot at x16. Ryzen 8000: the same slot at x8 or x4. Chipset: 1 x PCIe 3.0 x16 slot at x4 (PCIEX16(G3)_2), 2 x PCIe 3.0 x16 slots at x1 (PCIEX16(G3)_1 and _3) and 1 x PCIe 3.0 x1 slot. PCIEX16(G3)_2 runs at x1 when any of the _1, _3 or PCIEX1 slots is occupied.","m2_slots":"Ryzen 9000 and 7000: M.2_1 and M.2_2 are Key M, type 2280, PCIe 4.0 x4 from the CPU. Ryzen 8000 runs M.2_2 at PCIe 4.0 x4 or x2. M.2_3 is Key M, type 2242/2260/2280, PCIe 3.0 x4 from the B840 chipset. No slot lists a SATA mode, so sata is false. The heatsink flags come from the overview page and the manual: one flexible M.2 heatsink that fits M.2_1 or M.2_2, shown on M.2_1 in the maker's photo.","sata_port_count":"Storage: 4 x SATA 6Gb/s ports.","rear_ports":"Back panel list: 1 USB 10Gbps Type-C, 1 USB 10Gbps Type-A, 2 USB 5Gbps Type-A, 4 USB 2.0 Type-A, 1 DisplayPort (max 8K@30Hz as specified in DisplayPort 1.4), 1 HDMI (4K@60Hz as specified in HDMI 2.1), the Wi-Fi module, 1 Realtek 2.5Gb Ethernet port, 3 audio jacks and the BIOS FlashBack button. ASUS names USB by speed, so 10Gbps is stored as USB 3.2 Gen 2 and 5Gbps as USB 3.2 Gen 1. The page does not say the Type-C port has DisplayPort Alt mode. The footnote USB Type-C power delivery output max. 5V/3A sits under the front USB list and names no port, so it is not stored.","usb_headers":"1 x USB 5Gbps connector (supports USB Type-C), 1 x USB 5Gbps header for 2 ports and 2 x USB 2.0 headers for 4 ports. The 1 x Thunderbolt (USB4) header is for an add-in card and is not counted.","fan_header_count":"CPU fan, CPU OPT fan, AIO pump and 4 chassis fan headers, all 4-pin.","argb_header_count":"3 x Addressable Gen 2 headers.","rgb_header_count":"The internal connector list has 3 Addressable Gen 2 headers and no 12 V RGB header.","rgb_lighting":"The Aura Sync list names only the Addressable Gen 2 headers, and the feature list names no lit part of the board. Q-LED Core is a status light. The maker's board photo shows no lit part.","wifi":"A Wi-Fi module is listed on the back panel (1 x Wi-Fi module).","wifi_standard":"2x2 Wi-Fi 6E (802.11ax).","wifi_bands":"Supports 2.4/5/6GHz. The 6 GHz band varies by country and needs Windows 11 or later.","bluetooth_version":"Bluetooth v5.3. The page says the version may vary and refers to the Wi-Fi module maker.","bios_flashback":"BIOS FlashBack button on the back panel.","clear_cmos_button":"The back panel list has only the BIOS FlashBack button. Clear CMOS is a header on the board.","post_code_display":"Special features list ASUS Q-LED Core, a set of colour-coded status lights. No two-digit Q-Code display is listed.","onboard_power_button":"The internal connector list and the special features list name no power or start button on the board. The manual layout shows none.","dual_bios":"BIOS is a single 256 Mb flash ROM. Dual BIOS is not stated.","preinstalled_io_shield":"Special features list: Pre-mounted I/O shield.","tool_free_features":"ASUS Q-Design lists Q-Antenna, which the overview page describes as a snap-in Wi-Fi antenna connector. Q-DIMM and Q-Slot are also listed, but no read ASUS page says what they do, so they are not stored. The M.2 heatsink and the M.2 SSDs use screws.","in_the_box":"Accessories list on the specification page, the same as the manual's package contents.","back_connect_design":"The manual layout and the maker's photo show the usual front-side power and USB connectors. The board is not a back-connect design."}},{"url":"https://www.asus.com/motherboards-components/motherboards/prime/prime-b840-plus-wifi/","kind":"manufacturer_page","accessed":"2026-10-15","fields":["manufacturer_url","series","pcb_layers","vrm_layout","vrm_vcore_power_stages","m2_slots","tool_free_features","preinstalled_io_shield"],"notes":{"series":"PRIME is the ASUS line in the product name.","pcb_layers":"Six-layer PCB design.","vrm_layout":"8+2+1 phase digital power design with discrete MOSFETs: 8 Vcore, 2 SOC and 1 misc. The page lists no current rating for the stages.","vrm_vcore_power_stages":"The power diagram shows 8 Vcore power stages, 2 SOC and 1 misc.","m2_slots":"One Flexible M.2 heatsink can take care of either of the two M.2 slots. The product photo shows it on M.2_1. M.2_2 and M.2_3 have no heatsink.","tool_free_features":"Q-Antenna: the antenna fasteners snap into place instead of being turned.","preinstalled_io_shield":"Pre-Mounted I/O Shield: the pre-installed shield safeguards the ports."}},{"url":"https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM5/PRIME_B840-PLUS_WIFI/E24443_PRIME_B840-PLUS_WIFI_EM_WEB.pdf","kind":"manual","accessed":"2026-10-15","fields":["manual_url","ram_max_gb","m2_slots","in_the_box","onboard_power_button","post_code_display"],"notes":{"manual_url":"PRIME B840-PLUS WIFI User's Manual, English, released 2024-12-26 on the ASUS support page.","ram_max_gb":"Specifications summary: max. 192GB. The product page says 256GB and wins.","m2_slots":"Specifications summary and section 1.5: the same slot list as the specification page. The flexible M.2 heatsink can be installed on either the M.2_1 or the M.2_2 slot, and the heatsink steps apply only if a heatsink is pre-installed.","in_the_box":"Package contents: 2 x SATA 6Gb/s cables, 1 x ASUS WiFi Q-Antenna, 1 x M.2 rubber package, 3 x Screw packages for M.2 SSD, 1 x Quick start guide.","onboard_power_button":"The layout lists no power or start button. The front panel connector has a PWR_BTN header only.","post_code_display":"The layout lists no two-digit display. Q-LED Core is a status light."}},{"url":"https://www.asus.com/motherboards-components/motherboards/prime/prime-b840-plus-wifi/helpdesk_download/","kind":"manufacturer_page","accessed":"2026-10-15","fields":["ethernet_controllers","wifi_module"],"notes":{"ethernet_controllers":"The ASUS driver download page for this model, read through its public data feed, lists a Realtek RTL8125 LAN driver and a Realtek RTL8125D LAN driver for Windows 11. The suffix D is left out. The specification page says only Realtek 2.5Gb Ethernet.","wifi_module":"The same list names a MediaTek MT7922 WiFi driver and a MediaTek MT7922 Bluetooth driver. The specification page says only 2x2 Wi-Fi 6E."}},{"url":"https://www.asus.com/motherboards-components/motherboards/prime/prime-b840-plus-wifi/helpdesk_warranty/","kind":"manufacturer_page","accessed":"2026-10-15","fields":["warranty_years"],"notes":{"warranty_years":"ASUS warranty page for the model: motherboard standard warranty 3 years, for the global site."}},{"url":"https://www.amd.com/en/products/processors/chipsets/am5.html","kind":"manufacturer_page","accessed":"2026-10-15","fields":["cpu_overclocking"],"notes":{"cpu_overclocking":"AMD's AM5 chipset comparison table has the column Ryzen processor overclocking enabled. It reads No for B840 and Yes for DDR5 memory overclocking with AMD EXPO. This is the chip maker's page and not the board maker's. The ASUS pages state no CPU overclocking for this board."}},{"url":"https://www.maxmybuild.com/motherboards/asus-prime-b840-plus-wifi","kind":"spec_database","accessed":"2026-10-15","fields":["audio_codec","ethernet_controllers"],"notes":{"audio_codec":"Spec table: audio codec ALC897. ASUS names only a Realtek 7.1 codec, and its driver list names no model. This is the one source for the model. The same site lists MSRP $180 and a VRM of 2x4+2+1, which are not stored.","ethernet_controllers":"Spec table: LAN chip Realtek RTL8125, which matches the ASUS driver list."}},{"url":"https://www.pcgameshardware.de/Mainboard-Hardware-154107/News/AM5-Mainboards-von-Asus-mit-B850-und-B840-ab-209-Euro-1462968/","kind":"press","accessed":"2026-10-15","fields":["release_date","announce_date","launch_price_eur"],"notes":{"release_date":"Article of 2025-01-06 on the ASUS CES 2025 announcement: the boards start in retail on 13 January. Early German listings of the PRIME B840-PLUS WIFI at 228 euro were reported on 2025-01-05.","announce_date":"Article date 2025-01-06, source credited to ASUS, ASUS presented the boards at CES 2025.","launch_price_eur":"The article lists the ASUS Prime B840-Plus WiFi at 239 euro, with B840 boards at 209 to 239 euro, from the ASUS announcement. The article states no region and no tax treatment, so this is the euro price as the German site printed it. Early retailer listings were 228 euro. The USD launch price is left out because MaxMyBuild ($180), a distributor feed ($199.99) and a Wccftech conversion ($195 excl. VAT) disagree."}},{"url":"https://www.scan.co.uk/products/asus-prime-b840-plus-wifi-amd-b840-am5-ddr5-pcie-40-3x-m2-25gbe-ax-wifi-6e-bt-usb-10gbps-type-aplusc","kind":"retailer","accessed":"2026-10-15","fields":["status","gtins","model_numbers"],"notes":{"status":"Scan UK product page shows delivery for 2026-10-16, which means the board is on sale on 2026-10-15.","gtins":"GTIN 4711387797273 for model number 90MB1IZ0-M0EAY0.","model_numbers":"Model number 90MB1IZ0-M0EAY0."}},{"url":"https://www.buildcores.com/products/Motherboard/ssmzdxbne/Asus-B840-PRIME-PLUS-WIFI-AM5-DDR5-ATX","kind":"spec_database","accessed":"2026-10-15","fields":["gtins","model_numbers"],"notes":{"gtins":"UPC 197105797277 and EAN 4711387797273. The UPC is the other board code that the Spanish retailer datasheet for 90MB1IZ0-M0EAY0 prints as 0197105797277. The two codes are not paired with a part number, so no variant rows are written.","model_numbers":"Part numbers PRIME B840-PLUS WIFI, 90MB1IZ0-M0AAY0 and 90MB1IZ0-M0EAY0."}}],"fields_filled":62,"updated":"2026-10-15"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}