Seasonic FOCUS GX-850 850W Fully-Modular ATX 80 PLUS Gold PSU (Boxed)
850W Fully Modular ATX 3.1 PSU, 80 PLUS Gold, ATX 3.1 & PCIe 5.1 ready w/ native 12VHPWR. Hybrid silent fan (135mm FDB, fanless
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Discontinued
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| PSU (Power Supplies) - Wattage | 800 - 899 W |
|---|---|
| PSU (Power Supplies) - Efficiency Rating | 80 Plus Gold |
| PSU (Power Supplies) - Color | Black |
| PSU (Power Supplies) - Modularity | Fully modular |
| PSU (Power Supplies) - PCIe GPU Connectors | 1x 12VHPWR 16-pin 2x 8/6 pins |
| PSU (Power Supplies) - Length | 141-160 mm |
| PSU (Power Supplies) - EPS CPU Connectors | 2x 4+4pin EPS/ATX12V |
The Seasonic FOCUS GX-850 is a high-performance 850W fully modular ATX power supply upgraded to ATX 3.1 and PCIe 5.1 standards. Successor to the FOCUS PLUS series, it features removed inline capacitors for cleaner cabling and updated packaging under the OneSeasonic initiative. 80 PLUS Gold certified for up to 90% efficiency at 50% load.
S3FC Hybrid Silent Fan Control operates in Fanless Mode (up to 30% load), Silent Mode, and Cooling Mode with a 135mm Fluid Dynamic Bearing (FDB) fan for ultra-quiet operation and longevity. Premium Japanese capacitors ensure reliability, backed by a 10-year warranty. Compact 140mm depth fits small ATX cases.
ATX 3.1 compliant with native 600W 12VHPWR (12+4 pin) cable for RTX 40/50 series GPUs, plus multiple 6+2 pin PCIe connectors. Delivers 840W on single +12V rail (70A).
- ✅ Fully Modular black sleeved cables
- ✅ 80 PLUS Gold & Cybenetics Platinum efficiency
- ✅ Fanless until 30% load, 135mm FDB fan
- ✅ ATX 3.1 / PCIe 5.1 ready w/ 12VHPWR
- ✅ 2x EPS, 3x PCIe 6+2 pin connectors
- ✅ 10-year warranty, MTBF 100,000 hours
| Total power | 850 W |
| AC input voltage | 100 - 240 V |
| AC input frequency | 50/60 Hz |
| Input current | 12 - 6 A |
| Combined power (+3.3V) | 100 W |
| Combined power (+12V) | 840 W |
| Combined power (+5V) | 100 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5Vsb) | 15 W |
| Max output current (+3.3V) | 20 A |
| Max output current (+12V) | 70 A |
| Max output current (+5V) | 20 A |
| Max output current (-12V) | 0.3 A |
| Max output current (+5Vsb) | 3 A |
| Power protection features | Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage |
| Motherboard power connector | 20+4 pin ATX |
| Cabling type | Fully-Modular |
| 80 PLUS certification | 80 PLUS Gold |
| ATX version | 3.1 |
| Silent mode | Yes |
| Bearing technology | FDB |
| Mean time between failures (MTBF) | 100000 h |
| Product colour | Black |
| Cooling type | Active |
| Fan diameter | 135 mm |
| Number of fans | 1 fan(s) |
| Operating temperature (T-T) | 0 - 50 °C |
| Warranty period | 10 year(s) |
| PCI Express power connectors (6+2 pin) | 3 (on 3 cables) |
| PCIe 12+4 pin (12VHPWR) | 1x (600W) |
| CPU power connector (4+4 pin) | 2x EPS |
| Width | 150 mm |
| Depth | 140 mm |
| Height | 86 mm |
| Cybenetics Efficiency | Platinum (89-93%) |