SAMA GT850-Black 850 W ATX 3.1 power supply

Fully Modular ATX 3.1 Power Supply

The SAMA GT850-Black delivers 850 W of continuous power through a fully modular cable set. It meets the ATX 3.1 and PCIe 5.1 specifications and includes a native 12V-2x6 connector for direct GPU attachment. Japanese capacitors and dual 80 PLUS Gold certification support high efficiency and stable voltage regulation. The 120 mm ECO fan uses a fluid dynamic bearing and auto speed control for quiet operation.

Upgrade From Older ATX Units

This unit replaces power supplies built to earlier ATX revisions that lack the 12V-2x6 interface and the tighter transient response required by modern graphics cards. The jump is worth it when installing a card such as the RTX 4090 or any GPU demanding the PCIe 5.1 power standard. Older modular or non-modular units without native 12VHPWR cables will need adapters that add failure points. Hold-up time exceeds 11 ms and MTBF is rated over 100 000 hours at 25 °C.

High-End GPU Builds and Quiet Systems

The GT850-Black suits builders assembling high-end systems around current-generation GPUs who want a clean, cable-free interior and low acoustic output. It also fits workstations that benefit from the 3.3 V and 5 V rails rated at 20 A each for peripheral-heavy configurations. Users with modest graphics cards or tight budgets should look at lower-wattage Bronze units that still meet their actual power draw. Input range covers 100-240 V at 50-60 Hz for worldwide use.