Power supply Asrock PRO-850B 850W 80 Plus Bronze ATX 3.1, PCIe 5.1

Asrock PRO-850B is an 850W ATX power supply with 80+ Bronze certification and support for ATX 3.1 / PCIe Gen 5.0/5.1. It is aimed at mid-range to more serious gaming and workstation configurations, where we are talking about higher-end GPUs and the need for stable rails. It features an available 12+4 Pin PCI-E (PCI-E Gen5 12VHPWR) connector, making it ready for modern graphics cards from the new generations. It is not modular, but it is in standard ATX form factor with a compact length of 140 mm, which helps with compatibility in smaller cases.

What you actually get – 850W is more than sufficient for a powerful gaming build with a serious GPU and a multi-core CPU, without reaching the power supply limit during gaming load. 80+ Bronze and the stated 85% efficiency mean less heat loss and more stable operation under prolonged load. ATX 3.1 and PCIe Gen 5.0/5.1 support, plus the 12VHPWR connector, gives you direct compatibility with new generation GPUs without the need for adapters. Active PFC takes care of better power factor correction and a cleaner power line, which is important if you run your machine often under high load.

• 850W Power – suitable for configurations with a powerful GPU and a loaded multi-core CPU, without worrying about power shortage during peak consumption.
• 80+ Bronze Certification and 85% Efficiency – less excess heat and lower energy consumption compared to unbranded power supplies without certification.
• ATX 3.1 and PCIe Gen 5.0/5.1 Support – readiness for modern graphics cards and future upgrades without the need for additional adapters.
• 1 x 12+4 Pin PCI-E (PCI-E Gen5 12VHPWR) + 2 x 6+2 Pin PCI-E – a flexible combination of connectors for modern and older GPU models.
• 4 x SATA and 2 x Molex – sufficient power for SSDs, HDDs, fans, and peripheral devices in a normally equipped case.
• Active PFC – more stable power delivery and better behavior under fluctuations in mains voltage.
• 120 mm fan in an ATX case with 140 mm length – a good balance between cooling and noise, plus compatibility with most standard cases.

It is suitable for mid to high-end gaming configurations, streaming, and heavier productivity (rendering, editing), where there is a powerful graphics card and many devices. If you have an ultra-compact case or insist on fully modular cabling for a maximally clean internal look, this is not the most precise choice. However, for a standard mid-tower build, it covers the needs very well.

The combination of 850W, 80+ Bronze efficiency, and the current ATX 3.1 / PCIe Gen 5.0/5.1 standard with a 12VHPWR connector makes the Asrock PRO-850B a practical choice if you want a power supply that can withstand several generations of upgrades ahead.