{"data":{"slug":"montech-century-ii-850w","type":"power_supply","brand":"Montech","name":"Century II 850W","aliases":["Century II Gold 850 ATX3","Montech Century II 850","Century II 850"],"release_date":"2025-04","url":"https://arkivo.dev/power-supplies/montech-century-ii-850w","specs":{"series":"Century II","model_numbers":["Century II 850W"],"gtins":["4710562747263"],"announce_date":"2025-04-15","status":"available","predecessor":null,"successor":null,"launch_price_usd":89.9,"launch_price_eur":null,"markets":null,"colors":["Metallic Silver"],"manufacturer_url":"https://www.montechpc.com/century-ii-850w","spec_sheet_url":null,"manual_url":null,"eprel_registration_number":null,"warranty_years":10,"psu_standard":"atx","psu_atx_version":"atx_3_1","pcie_cem_version":"pcie_5_1","psu_modular":"full","oem_manufacturer":"Shenzhen Xinweiye Technology (XWY)","psu_w":850,"rated_power_temp_c":40,"rail_12v_design":"single","rail_12v_current_a":70.8,"rail_12v_power_w":849.6,"minor_rails_combined_w":100,"rail_5vsb_current_a":3,"ac_input_voltage":{"min_v":100,"max_v":240},"alpm_support":true,"efficiency_80_plus":"80_plus_gold","cybenetics_efficiency_115v":"cybenetics_platinum","cybenetics_efficiency_230v":"cybenetics_platinum","cybenetics_noise_115v":"a_minus","cybenetics_noise_230v":"a_minus","measured_avg_efficiency_115v_pct":89.8,"measured_avg_efficiency_230v_pct":91.84,"measured_light_load_efficiency_115v_pct":70.357,"measured_avg_power_factor_115v":0.985,"measured_avg_noise_115v_dba":26.89,"measured_noise_full_load_115v_dba":42.1,"measured_vampire_power_115v_w":0.073,"measured_hold_up_time_ms":22.4,"measured_ripple_12v_mv":28.25,"measured_load_regulation_12v_pct":0.39,"cables":[{"connector":"atx_24pin","count":1,"cable_count":1,"length_mm":590,"gauge_awg":"18AWG","rated_power_w":null},{"connector":"eps_8pin","count":2,"cable_count":2,"length_mm":700,"gauge_awg":"18AWG","rated_power_w":null},{"connector":"pcie_8pin","count":4,"cable_count":2,"length_mm":600,"gauge_awg":"18AWG","rated_power_w":null},{"connector":"12v_2x6","count":1,"cable_count":1,"length_mm":600,"gauge_awg":"16AWG","rated_power_w":600},{"connector":"sata","count":8,"cable_count":2,"length_mm":500,"gauge_awg":"18AWG","rated_power_w":null},{"connector":"molex","count":4,"cable_count":1,"length_mm":500,"gauge_awg":"18AWG","rated_power_w":null}],"eps_connector_count":2,"pcie_8pin_connector_count":4,"gpu_16pin_connector_count":1,"sata_connector_count":8,"molex_connector_count":4,"cable_style":"flat","fan_size_mm":135,"fan_bearing":"fluid_dynamic","fan_mode":"semi_passive","fan_mode_switch":true,"protections":["ocp","ovp","uvp","opp","otp","scp","nlo","sip"],"all_japanese_capacitors":true,"mtbf_h":null,"software_monitoring":null,"software_name":null,"power_display":null,"rgb_lighting":false,"dimensions_mm":{"width_mm":150,"height_mm":86,"depth_mm":140},"weight_kg":null,"in_the_box":["AC power cable","Mounting screws","Velcro-style cable straps","Cable ties","User manual"]},"variants":[],"sources":[{"url":"https://www.montechpc.com/century-ii-850w","kind":"manufacturer_page","accessed":"2026-10-14","fields":["series","model_numbers","gtins","colors","manufacturer_url","warranty_years","psu_standard","psu_atx_version","pcie_cem_version","psu_modular","psu_w","rated_power_temp_c","rail_12v_current_a","rail_12v_power_w","minor_rails_combined_w","rail_5vsb_current_a","ac_input_voltage","cables","cable_style","fan_size_mm","fan_bearing","fan_mode","protections","all_japanese_capacitors","dimensions_mm"],"notes":{"model_numbers":"Specifications tab: Model Name Century II 850W. The maker prints no part number.","gtins":"Specifications tab: EAN 4710562747263.","colors":"Overview text: a sleek metallic silver finish. The maker names no other colour for this wattage.","warranty_years":"Specifications tab: Warranty 10 Years. The page is the global maker page and names no market.","psu_standard":"Specifications tab: Form Factor ATX (140).","psu_atx_version":"Overview: ATX 3.1 and PCIe 5.1 platform support. The 80 PLUS certificate type line reads ATX 3.0, ATX 3.1.","pcie_cem_version":"Overview: ATX 3.1 and PCIe 5.1 platform support.","rated_power_temp_c":"Specifications tab: Operating Temperature 0-40 C. Tom's Hardware prints the power table as Rated @ 40 C. The Cybenetics report leaves its continuous full load temperature row empty.","rail_12v_current_a":"DC Output table: +12V 70.8A, 849.6W.","rail_12v_power_w":"DC Output table: +12V 70.8A, 849.6W.","minor_rails_combined_w":"DC Output table prints +3.3V 20A 100W and +5V 20A 100W. The Cybenetics power table has one merged 100W cell for 3.3V and 5V, so 100W is the combined limit.","rail_5vsb_current_a":"DC Output table: +5VSB 3A, 15W.","ac_input_voltage":"AC Input 100-240 VAC, 50-60 Hz, 10 A max.","cables":"Cables table: 1 motherboard cable with a 20+4 pin plug, 2 CPU cables with one 4+4 pin plug, 2 PCIe cables with two 6+2 pin plugs, 1 12V-2x6 cable, 2 SATA cables with 4 plugs and 1 Molex cable with 4 plugs. Lengths and gauge come from the Cybenetics report.","cable_style":"Overview: Flat cables and fully modular design.","fan_size_mm":"Specifications tab: Fan Size 135 mm.","fan_bearing":"Specifications tab: Fan Bearing FDB.","fan_mode":"Overview: 135 mm FDB fan with Smart Zero Fan mode.","protections":"Specifications tab: OPP / OVP / UVP / SCP / OCP / OTP.","all_japanese_capacitors":"Overview: 100% Japanese capacitors. The launch article says 100% Japanese electrolytic capacitors.","dimensions_mm":"Specifications tab: Dimensions (LxWxH) 140 x 150 x 86 mm, so depth 140, width 150, height 86. Tom's Hardware says the unit is 160 mm long. The maker value is stored and retailers copy it."}},{"url":"https://www.montechpc.com/news-century-ii","kind":"press_release","accessed":"2026-10-14","fields":["announce_date","launch_price_usd","all_japanese_capacitors"],"notes":{"announce_date":"Launch article dated 2025-04-15. The unit is available from that day (see the Funkykit launch report).","launch_price_usd":"Article: Starting at just $89.9. Funkykit lists the 850W model at US$ 89.9, the lowest of the three launch models. US price, no sales tax.","all_japanese_capacitors":"Article: 100% Japanese electrolytic capacitors."}},{"url":"https://www.funkykit.com/news/montech-introduces-century-ii-power-supply/","kind":"press","accessed":"2026-10-14","fields":["release_date","launch_price_usd"],"notes":{"release_date":"Available on April 15, 2025 at 9 AM Eastern Time. Cybenetics received the unit on Apr 29, 2025.","launch_price_usd":"Century II 850 W: US$ 89.9. The 1050 W is US$ 109.9 and the 1200 W is US$ 129.9."}},{"url":"https://www.kitguru.net/components/power-supplies/joao-silva/montech-launches-cybenetics-platinum-certified-century-ii-psus/","kind":"press","accessed":"2026-10-14","fields":["release_date"],"notes":{"release_date":"Published April 15, 2025: the 850W, 1050W and 1200W models are now available. KitGuru prints $89.99 for the 850W while Montech and Funkykit print $89.9. The maker value is stored."}},{"url":"https://www.cybenetics.com/evaluations/psus/2813/","kind":"measurement","accessed":"2026-10-14","fields":["oem_manufacturer","rail_12v_design","alpm_support","psu_w","rail_12v_current_a","rail_12v_power_w","minor_rails_combined_w","rail_5vsb_current_a","ac_input_voltage","cybenetics_efficiency_115v","cybenetics_efficiency_230v","cybenetics_noise_115v","cybenetics_noise_230v","measured_avg_efficiency_115v_pct","measured_avg_efficiency_230v_pct","measured_light_load_efficiency_115v_pct","measured_avg_power_factor_115v","measured_avg_noise_115v_dba","measured_noise_full_load_115v_dba","measured_vampire_power_115v_w","measured_hold_up_time_ms","measured_ripple_12v_mv","measured_load_regulation_12v_pct","cables","protections","fan_mode","fan_bearing","fan_size_mm","fan_mode_switch","psu_modular","psu_standard"],"notes":{"oem_manufacturer":"DUT Information: OEM/ODM Shenzhen Xinweiye Technology Co., Ltd. Tom's Hardware calls the company XWY.","rail_12v_design":"Power Specifications: one +12V column with 70.8A and 849.6W, and one OCP result for 12V.","alpm_support":"Temperature and Compliance Info: ALPM compatible, checked.","psu_w":"Manufacturer-provided information: Rated Power 850 W.","ac_input_voltage":"Manufacturer-provided information: 100-240 Vrms, 10 A, 50-60 Hz.","cybenetics_efficiency_115v":"Report 25PS2813A, certification ID 252813, issued May 13, 2025. The database name is Montech Century II Gold 850 ATX3. The badge is ETA Platinum at 115V.","cybenetics_efficiency_230v":"ETA Platinum at 230V.","cybenetics_noise_115v":"LAMBDA A- at 115V.","cybenetics_noise_230v":"LAMBDA A- at 230V.","measured_avg_efficiency_115v_pct":"Average over more than 1450 load combinations at 115V. Tested May 10, 2025, ambient 28-32 C. The report lists no sample serial.","measured_avg_efficiency_230v_pct":"Average over more than 1450 load combinations at 230V.","measured_light_load_efficiency_115v_pct":"Efficiency at 2% load (more than 500 W unit) at 115V.","measured_avg_power_factor_115v":"Average over more than 1450 load combinations at 115V. At 230V it is 0.945.","measured_avg_noise_115v_dba":"Average over more than 1450 load combinations at 115V, ambient 28-32 C, Bruel and Kjaer 2270 G4 sound analyzer. The 230V average is 26.26 dBA.","measured_noise_full_load_115v_dba":"Typical load tests at 115V, 100% load row: 42.1 dB(A) at 1698 rpm fan speed, ambient about 30 C.","measured_vampire_power_115v_w":"Standby power consumption at 115V with no load on +5VSB: 0.0730 W. At 230V it is 0.1474 W.","measured_hold_up_time_ms":"Hold-Up Time and PWR_OK Signal: hold-up time 22.4 ms, AC loss to PWR_OK 14.3 ms, at maximum continuous load.","measured_ripple_12v_mv":"Non-accredited. 12V ripple at full load at 115V. At 230V it is 29.21 mV.","measured_load_regulation_12v_pct":"Non-accredited. 12V load regulation at 115V. At 230V it is 0.27%.","cables":"Cables and Connectors table: ATX 20+4 pin 590 mm 18AWG, 2 x 4+4 pin EPS 700 mm 18AWG, 2 x 6+2 pin PCIe cables 600 mm then 150 mm with 4 plugs in total 18AWG, 12+4 pin PCIe 600 mm (600W) 16-26AWG, 2 SATA cables of 500 mm plus 3 x 150 mm spacing with 8 plugs in total 18AWG, 1 Molex cable 500 mm plus 3 x 150 mm with 4 plugs 18AWG. The 16-26AWG range of the 12V-2x6 cable includes the thin sideband wires, so the stored gauge is the 16AWG power wire.","protections":"Protection Features (Manufacturer) lists OPP, +12V OCP, OTP, SCP, surge and inrush current protection. Protection tests tick UVP at 90 V and 80 V and NLO. The maker lists OVP, which the report does not test.","fan_mode":"DUT Information: Semi-Passive Operation checked (selectable).","fan_bearing":"DUT Information: 135mm Fluid Dynamic Bearing Fan (HA13525M12SF-Z).","fan_size_mm":"DUT Information: 135mm Fluid Dynamic Bearing Fan.","fan_mode_switch":"DUT Information: Semi-Passive Operation marked selectable.","psu_modular":"DUT Information: Cable Design Fully Modular.","psu_standard":"DUT Information: Type ATX12V. The maker lists form factor ATX (140)."}},{"url":"https://www.clearesult.com/80plus/sites/80plus/files/manufacturer-certificate/MONTECH_CENTURY%20II%20850W_850W_SOCE%207850_Report.pdf","kind":"certification_list","accessed":"2026-10-14","fields":["efficiency_80_plus"],"notes":{"efficiency_80_plus":"80 PLUS ID 7850, model CENTURY II 850W: Gold at 115V, test date 2025-06-04. The certificate lists no sample serial. The maker's own product page says Platinum, which is the Cybenetics level."}},{"url":"https://www.tomshardware.com/pc-components/power-supplies/montech-century-ii-gold-850w-atx-3-1-power-supply-review","kind":"review_site","accessed":"2026-10-14","fields":["rated_power_temp_c","fan_mode_switch","cable_style","in_the_box","oem_manufacturer"],"notes":{"rated_power_temp_c":"Power specifications table titled Rated @ 40 C. Same figure as the maker's operating temperature.","fan_mode_switch":"External Appearance: a smaller secondary toggle on the rear lets the user disable the hybrid mode and run the fan continuously.","cable_style":"The cable bundle is all-black and entirely flat-ribbon in construction.","in_the_box":"In the Box: AC power cable, mounting screws, reusable Velcro-style cable straps, cable ties and a small user manual. Review published 7 September 2026.","oem_manufacturer":"Internal Design: the OEM is Shenzhen Xinweiye Technology Co., typically referred to as XWY."}},{"url":"https://www.maxmybuild.com/power-supplies/montech-century-ii-850w","kind":"retailer","accessed":"2026-10-14","fields":["status","rgb_lighting"],"notes":{"rgb_lighting":"Listing specs: no RGB. Tom's Hardware and the maker page describe no lighting.","status":"Listing shows $89.90 at Amazon and Newegg, updated 14 Oct 2026. Scan UK lists only an open-box unit and calls the model end of life. Tom's Hardware, in its review of 7 September 2026, lists it at Amazon, Newegg and Best Buy."}}],"fields_filled":54,"updated":"2026-10-14"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}