Gamemax Power Supply 850W MAX P850B Bronze Non-Modular

Gamemax MAX P850B is an 850 W ATX power supply, aimed at mid-range to more serious gaming and workstation configurations. It combines 80+ Bronze efficiency (up to ≥88% at 50% load) with the modern standard ATX 3.1 and support for PCIe Gen 5.0/5.1, so it covers both current and next-generation GPUs. With active PFC and DC to DC topology, you get more stable voltage delivery under variable loads. Yes, it is not modular, but in exchange, it comes with a focus on reliability – Japanese capacitors, serious protection package, and good thermal characteristics.

What you get

With real 850 W output power and full compatibility with Intel ATX 3.1 (200% system / 300% GPU power excursions), this PSU is prepared for sharp peaks in consumption of modern video cards, without dropping voltages or shutting down the system. Active PFC + Double forward + DC to DC topology helps with better stability of 12 V lines and lower losses, especially under gaming load. 100% Japanese electrolytic capacitors (Rubycon, NCC, Nichicon) are a serious plus for long-term reliability, especially if the machine runs many hours per day. The 120 mm fan with Hydro Bearing is designed for MTBF 40,000 h @ 40 °C, which means long life and lower noise at normal home or office temperature. Thanks to the wide input range 180–264 V with support up to 160 V, the power supply handles better with fluctuations in grid voltage – useful if your installation is not ideal.

• Power 850 W – enough for serious gaming or a work computer with a powerful GPU and many peripherals, without easily reaching the power supply limit.
• 80+ Bronze efficiency (≥88% at 50% load) – less energy lost as heat and more stable operation under typical gaming scenario.
• ATX12V v3.1 + ATX 3.0/3.1 – PCIe Gen 5.0/5.1 – readiness for modern and future video cards with higher peak consumptions and requirements for the power supply.
• Active PFC + Double forward + DC to DC topology – better power factor, cleaner voltages, and fewer fluctuations under fast load changes.
• 100% Japanese electrolytic capacitors and 16-pin master protection IC – focus on long life and reliable electrical protection of components.
• Full protection package (OPP / OVP / SCP / OTP / OCP / UVP / SIP / NLO) – protection from overload, overvoltage, short circuit, overheating, and other anomalies in the power supply.
• 120 mm Hydro Bearing fan, MTBF 40,000 h @ 40 °C – balance between cooling and noise, suitable for long-term 24/7 operation.
• Compact dimensions 140 × 150 × 86 mm – standard ATX format with shorter length of 140 mm, which facilitates mounting in more compact cases.
• Official 80 PLUS Bronze certification (ID EU-1291) and compliance with IEC 62368-1:2018 and ErP 2014 – covers key safety and energy efficiency standards.

Who it is suitable for

MAX P850B is a good choice if you are building a mid-range to high-end gaming configuration or workstation and want an ATX 3.1 PSU that can withstand peaks of modern GPUs without drama. It is also suitable for systems that run long under load – streaming, rendering, light production. If you chase maximally "clean" cable management, the non-modular design may limit you, but in larger cases this is manageable.

The most sensible here is the combination of 850 W power, ATX 3.1 support, and Japanese capacitors at a price in the 80+ Bronze class. You get a current standard and stability, without paying extra for extras that you may not actually need.