{"data":{"slug":"asrock-b850m-x-r2-0","type":"motherboard","brand":"ASRock","name":"B850M-X R2.0","aliases":["B850M-X Rev 2.0","ASRock B850M-X R2.0"],"release_date":"2025-05","url":"https://arkivo.dev/motherboards/asrock-b850m-x-r2-0","specs":{"series":null,"model_numbers":["B850M-X R2.0","90-MXBSG0-A0UAYZ"],"gtins":["4711581490758"],"announce_date":null,"status":"available","predecessor":null,"successor":null,"launch_price_usd":null,"launch_price_eur":null,"markets":null,"colors":null,"manufacturer_url":"https://www.asrock.com/MB/AMD/B850M-X%20R2.0/index.asp","spec_sheet_url":null,"manual_url":"https://download.asrock.com/Manual/B850M-X%20R2.0.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":226,"height_mm":244},"pcb_layers":6,"back_connect_design":false,"rgb_lighting":false,"vrm_layout":"6+1+1","vrm_vcore_power_stages":6,"vrm_vcore_stage_rating_a":null,"vrm_controller":null,"cpu_power_connectors":"8 pin","supplemental_pcie_power":false,"ram_type":"ddr5","ram_slot_count":2,"ram_max_gb":128,"ram_max_speed_mts":8200,"ram_ecc":true,"cudimm_support":null,"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":4,"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 1","count":1,"max_gbps":5,"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":"usb_a","version":"USB 2.0","count":2,"max_gbps":0.48,"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":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":6,"rear_usb_c_count":1,"rear_usb_max_gbps":5,"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":6,"argb_header_count":3,"rgb_header_count":1,"ethernet_controllers":["Realtek RTL8125"],"ethernet_port_count":1,"ethernet_max_gbps":2.5,"wifi":false,"wifi_standard":null,"wifi_bands":null,"wifi_max_channel_width_mhz":null,"wifi_module":null,"bluetooth_version":null,"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":false,"tool_free_features":["m2_latch"],"measured_vrm_temp_c":null,"measured_power_idle_w":null,"measured_power_cpu_stress_w":null,"in_the_box":["1 x I/O Shield","2 x Serial ATA (SATA) Data Cables","1 x Screw for M.2 Socket"]},"variants":[],"sources":[{"url":"https://download.asrock.com/Manual/B850M-X%20R2.0.pdf","kind":"manual","accessed":"2026-10-15","fields":["manual_url","model_numbers","cpu_socket","motherboard_chipset","supported_cpu_series","motherboard_form_factor","back_connect_design","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","ethernet_controllers","wifi","audio_codec","bios_flashback","clear_cmos_button","post_code_display","onboard_power_button","dual_bios","preinstalled_io_shield","tool_free_features","in_the_box"],"notes":{"manual_url":"ASRock manual for the B850M-X WiFi R2.0 and the B850M-X R2.0, 72 pages, Version 1.0, published February 2025. The cover says Micro ATX. Items marked B850M-X WiFi R2.0 are not used. asrock.com sits behind a bot check, so the maker's product page was not opened.","model_numbers":"Cover and chapter 1 name the B850M-X R2.0. The part number 90-MXBSG0-A0UAYZ is on BuildCores, Paradigit and ComputerG. The Wi-Fi board is a separate model, 90-MXBSH0-A0UAYZ.","supported_cpu_series":"Section 1.2: AMD Socket AM5 Ryzen 9000, 8000 and 7000 Series Processors. Slot availability depends on the CPU. Read on 2026-10-15.","motherboard_form_factor":"Section 1.2: Micro ATX Form Factor.","back_connect_design":"The layout in section 1.3 shows the usual front-side power, fan and USB connectors. It is not a back-connect board.","cpu_power_connectors":"Section 1.2 connector list: 1 x 8 pin 12V power connector (Hi-Density Power Connector), next to the 24 pin ATX connector.","supplemental_pcie_power":"The connector list has no extra slot power connector. The manual never states that one is absent.","ram_type":"Section 1.2: Dual Channel DDR5.","ram_slot_count":"Section 1.2: 2 x DDR5 DIMM slots (DDR5_A1 and DDR5_B1).","ram_max_gb":"Section 1.2: max. capacity of system memory 128GB.","ram_max_speed_mts":"Section 1.2: DDR5 ECC/non-ECC un-buffered memory up to 8200+(OC). The manual names no CPU family or module setup. It refers to the Memory Support List on the maker's website.","ram_ecc":"Section 1.2: supports DDR5 ECC/non-ECC un-buffered memory. The manual does not say whether ECC is active with each CPU. BuildCores also lists ECC support as yes.","expansion_slots":"Section 1.2 and 1.5: PCIE1 is PCIe 5.0 x16 from the CPU (Gen5 x16 with Ryzen 9000 and 7000, Gen4 x8 with Ryzen 8000 Phoenix 1, Gen4 x4 with Phoenix 2). From the chipset: PCIE2 PCIe 4.0 x1 and PCIE3 a PCIe 4.0 x16 slot that runs at x4. The M.2 Key E socket for a Wi-Fi module is not listed. The board has no Wi-Fi module installed.","m2_slots":"Section 1.2: M2_1 is the Blazing M.2 socket (Key M) for type 2280, PCIe Gen5x4 from the CPU. It runs Gen5x4 with Ryzen 9000 and 7000 and Gen4x4 with Ryzen 8000. M2_2 is the Hyper M.2 socket (Key M) for type 2260 and 2280, PCIe Gen4x4 from the CPU. It runs Gen4x2 with Ryzen 8000 Phoenix 2. 2280 is stored for M2_2. The manual lists both slots with PCIe modes only, so sata is false. The install guides in sections 2.17 and 2.18 show a heatsink to remove on M2_1 and none on M2_2. The manual lists no lane sharing between slots.","sata_port_count":"Section 1.2: 4 x SATA3 6.0 Gb/s connectors from the chipset.","rear_ports":"Section 1.2 and 1.4: 1 HDMI (HDMI 2.1 TMDS/FRL 8G compatible, up to 4K 120Hz), 1 DisplayPort 1.4 with DSC, 1 USB 3.2 Gen1 Type-C (5 Gb/s per the block diagram), 3 USB 3.2 Gen1 Type-A, 2 USB 2.0, 1 RJ-45 2.5G LAN and 3 HD audio jacks (Line in, Front Speaker, Microphone). The 2 antenna mounting points, which hold no antenna on this board, and the BIOS Flashback button are not ports.","usb_headers":"Section 1.2 connector list: 1 front panel Type C USB 3.2 Gen1 header, 1 USB 3.2 Gen1 header for 2 ports and 2 USB 2.0 headers for 4 ports. The manual states no power output for the Type-C header.","fan_header_count":"Section 1.2: 2 CPU fan connectors, 3 chassis or water pump fan connectors and 1 AIO pump fan connector, all 4-pin.","argb_header_count":"Section 1.2: 3 x addressable LED headers (5 V, 3 A in total).","rgb_header_count":"Section 1.2: 1 x RGB LED header (12 V, 3 A in total).","ethernet_controllers":"Section 1.2: 2.5 Gigabit LAN, Dragon RTL8125BG. The suffix BG is left out.","wifi":"Section 1.2 lists the wireless module only for the B850M-X WiFi R2.0. Section 2.16 is a guide for adding a Wi-Fi module to the B850M-X R2.0, and the rear panel has antenna mounting points instead of antenna ports. So no module is installed.","audio_codec":"Section 1.2: 7.1 CH HD Audio, Realtek ALC897 Audio Codec.","bios_flashback":"Section 1.2 and 2.14: the BIOS Flashback button on the rear panel updates the BIOS without a CPU.","clear_cmos_button":"The layout lists a Clear CMOS jumper (CLRCMOS1). The only rear panel button is BIOS Flashback. BuildCores lists Clear CMOS Button: No.","post_code_display":"Section 2.15: the Post Status Checker is four colour LEDs for CPU, DRAM, VGA and BOOT, not a two-digit display.","onboard_power_button":"Section 2.14 says the only smart switch is the BIOS Flashback button. The layout lists no power or reset button.","dual_bios":"The block diagram shows one flash ROM. Dual BIOS is not stated.","preinstalled_io_shield":"Section 1.1 package contents lists 1 x I/O Shield as a loose item, and section 2.5 is a guide to installing the I/O panel shield.","tool_free_features":"The install guides for M2_1 and M2_2 use a nut lock that is turned clockwise to lock a 2280 module in place without a screw. The M2_1 heatsink needs a screwdriver and is not tool-free. The manual names no PCIe release button.","in_the_box":"Section 1.1 package contents: 1 x I/O Shield, 2 x Serial ATA (SATA) Data Cables (Optional) and 1 x Screw for M.2 Socket (Optional) for the B850M-X R2.0, without the board. The two antennas listed are for the Wi-Fi board and are left out."}},{"url":"https://computerorbit.com/products/asrock-b850m-x-r2-0-micro-atx-am5-motherboard","kind":"retailer","accessed":"2026-10-15","fields":["release_date","status","vrm_layout","vrm_vcore_power_stages","pcb_layers","dimensions_mm","segment","rgb_lighting","in_the_box","gtins"],"notes":{"release_date":"The shop's product feed shows this listing created on 2025-05-28 in the UK, and the Wi-Fi board on 2025-05-22. ASRock's manual for both boards is dated February 2025 and the Wi-Fi board went on sale in Japan on 2025-04-04. The date for the board without Wi-Fi is approximate.","status":"Listed as available on 2026-10-15.","vrm_layout":"Shop copy of ASRock's product page: 6+1+1 Phase Power Design, Dr.MOS for VCore. The page gives no current rating and no controller.","vrm_vcore_power_stages":"The first number of 6+1+1 is the Vcore rail, built with Dr.MOS power stages.","pcb_layers":"Shop copy of ASRock's text: the 6 Layer PCB provides stable signal traces and power shapes.","dimensions_mm":"Shop copy of ASRock's spec: Micro ATX Form Factor 9.6-in x 8.9-in, 24.4 cm x 22.6 cm. The 244 mm side runs along the rear I/O edge, as the field help says for Micro ATX, so it is stored as the height. The shorter 226 mm side is the width.","segment":"ASRock text: a high-value X-Series board for everything from professional productivity to everyday use. It is not in the Phantom Gaming, Steel Legend or Taichi lines.","rgb_lighting":"The text names only onboard RGB and addressable RGB headers for external devices. It names no lighting on the board.","in_the_box":"Accessories: 1 x I/O Shield, 2 x SATA Data Cables, 1 x Screw for M.2 Socket.","gtins":"Shop feed barcode 4711581490758 for SKU B850M-X R2.0. The Wi-Fi board has 4711581490765."}},{"url":"https://www.avadirect.com/B850M-X-R2-0-AMD-B850-Chipset-AM5-microATX-Motherboard/Product/19612206","kind":"retailer","accessed":"2026-10-15","fields":["vrm_layout","dimensions_mm"],"notes":{"vrm_layout":"Spec text: 6+1+1 Phase Power Design, Dr.MOS for VCore.","dimensions_mm":"Spec text: Micro ATX Form Factor 9.6-in x 8.9-in, 24.4 cm x 22.6 cm."}},{"url":"https://www.paradigit.ie/asrock-b850m-x-r2-0/21812982/product","kind":"retailer","accessed":"2026-10-15","fields":["pcb_layers","dimensions_mm","model_numbers"],"notes":{"pcb_layers":"Text: the 6 Layer PCB provides stable signal traces and power shapes.","dimensions_mm":"Width 244 mm and depth 226 mm in the spec table. The shop calls the longer side the width. It runs along the rear I/O edge.","model_numbers":"Manufacturer part number 90-MXBSG0-A0UAYZ. The page lists 3 M.2 slots in its highlights and 1 in its table, which fits neither the manual nor the maker's text, so it is not used for slots."}},{"url":"https://www.ox.ee/en/product/3162912","kind":"retailer","accessed":"2026-10-15","fields":["gtins","warranty_years"],"notes":{"gtins":"EAN 4711581490758. The Computer Orbit feed and the ComputerG listing show the same number.","warranty_years":"Warranty: 36 months. The market is Estonia. Arvutitark also lists 36 months."}},{"url":"https://www.computerg.shop/it/shop/asrock-b850m-x-r2-0-b850-am5-90-mxbsg0-a0uayz-42489","kind":"retailer","accessed":"2026-10-15","fields":["model_numbers","gtins","dimensions_mm"],"notes":{"model_numbers":"Part number 90-MXBSG0-A0UAYZ.","gtins":"Barcode 4711581490758.","dimensions_mm":"Width 244 mm and depth 226 mm. The shop calls the longer side the width."}},{"url":"https://www.buildcores.com/products/Motherboard/4aue7wofw/ASRock-B850-M-X-R2.0-DDR5-Micro-ATX","kind":"spec_database","accessed":"2026-10-15","fields":["rgb_lighting","clear_cmos_button","model_numbers","release_date","ram_ecc"],"notes":{"rgb_lighting":"Lighting: None. The headers are for external devices.","clear_cmos_button":"Clear CMOS Button: No.","model_numbers":"Retailer part number 90-MXBSG0-A0UAYZ. The page also shows a UPC 4711581490765 that other shops attach to the Wi-Fi board, so it is not stored. Its Wi-Fi 6E row also belongs to the Wi-Fi board.","release_date":"Release year 2025.","ram_ecc":"ECC Support: Yes."}},{"url":"https://www.gdm.or.jp/crew/2025/0404/581769","kind":"press","accessed":"2026-10-15","fields":["release_date","vrm_layout","dimensions_mm"],"notes":{"release_date":"Hermitage Akihabara report of 2025-04-04: the B850M-X WiFi R2.0 went on sale at TSUKUMO that day in Japan. The article does not cover the board without Wi-Fi.","vrm_layout":"6+1+1 phases, Dr.MOS for VCore, for the Wi-Fi board.","dimensions_mm":"Micro-ATX (244 x 226 mm), for the Wi-Fi board."}},{"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 chipset page describes the B850 platform with enhanced overclocking capabilities. The page timed out when opened, so the text was read in a search result. This is the chip maker's page, not the board maker's. The ASRock manual carries an overclocking warning and names Untied Overclocking Technology."}},{"url":"https://www.asrock.com/MB/AMD/B850M-X%20R2.0/index.asp","kind":"manufacturer_page","accessed":"2026-10-15","fields":["manufacturer_url"],"notes":{"manufacturer_url":"The page returned a bot check, so it was not read and the check was not worked around. Its address is the one in the job brief. No value comes from it."}}],"fields_filled":54,"updated":"2026-10-16"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}