MSI MAG A850GN PCIE5 850W ATX 3.1 80 Plus Gold Non-Modular Power Supply

The MSI MAG A850GN PCIe5 is an 850-watt ATX 3.1 power supply built to meet the demands of modern high-performance desktop systems. Carrying the 80 Plus Gold certification, it delivers strong efficiency across a wide load range, helping reduce energy waste and heat output compared to lower-rated units. The unit ships with a native PCIe CEM 5.1 connector, making it directly compatible with NVIDIA GeForce RTX 40 and RTX 50 series graphics cards without adapters. Built on a full-bridge topology with a DC-to-DC module design, the MAG A850GN PCIe5 maintains tight voltage regulation on the +12V rail — a single-rail configuration that simplifies power delivery to demanding CPUs and GPUs alike. The dual 4+4-pin CPU connectors ensure that high-core-count processors receive stable 12V power even under sustained workloads. The ATX 3.1 compliance also means the unit can handle up to 2x total power excursion and 3x GPU power excursion, accommodating the transient spikes that modern graphics cards generate. Thermal management is handled by a 120 mm sleeve-bearing fan. The fan curve is tuned to prioritise quiet operation: at 70% load the noise level is kept below 20 dBA according to the manufacturer. The 105°C-rated main capacitor is selected for long-term reliability under elevated temperatures and voltage fluctuations. Protection coverage includes overvoltage protection (OVP), overcurrent protection (OCP), overpower protection (OPP), over-temperature protection (OTP), and short-circuit protection (SCP). Cables are flat, black, and made with copper-alloy terminals, said by the manufacturer to offer improved safety over standard phosphor-bronze connectors during high-current surges. This is a non-modular design, so all cables are permanently attached. Verified Specifications: - Wattage: 850 W - ATX Standard: ATX 3.1 / PCIe CEM 5.1 - Efficiency Rating: 80 Plus Gold - Modular: Non-modular - Fan: 120 mm sleeve-bearing - Main Capacitor Rating: 105°C - PCIe Connectors (6+2-pin): 2 - CPU Connectors (4+4-pin): 2 (dual) - SATA Connectors: 4 - Peripheral (4-pin Molex): 2 - Protections: OVP, OCP, OPP, OTP, SCP - Warranty: 5 years - Series: MAG