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Seasonic · 850 W · ATX

Seasonic Focus GX-850 White

ATX 3.0 · 80 PLUS Gold · Modular

Capability: 77
Cap / price: 47
Wattage value: 41
Amazon: $165

View Seasonic Focus GX-850 White Gallery in high resolution

Available on Amazon Updated Aug 30, 2026 Prime FBA

Capability76.9

Capability / price46.7

Wattage value41.3

$165 on Amazon PSU table Compare this PSU

Size this PSU for a complete buildThe Builder unlocks PSU choices after it knows the CPU, GPU, case format, and estimated demand. Calculate build power first

Written analysis

Seasonic Focus GX-850 White at a glance

The Seasonic Focus GX-850 White is a 850 W ATX power supply built to the ATX 3.0 generation. Efficiency is listed as 80 PLUS Gold. Cables are modular. It supports fan-stop at low load.

The calculated capability score is 76.9, averaging the available wattage, recorded efficiency percentage, and warranty inputs against fixed references. Listed warranty is 10 years. +12V output is 70 A.

Best fit: Performance desktops whose calculated component load fits comfortably within a 750–999 W supply.

Platform and cooling

Dimensions are listed as 140 × 150 × 86 mm. Cooling fan size is 120 mm. The unit uses 1 +12V rail at up to 70.00 A per rail. Certifications include 80 PLUS®Gold.

Current value

At $165, price per kilowatt is $193.59. Capability / price is 46.7 and wattage value is 41.3. Compare nearby supplies below; wattage alone does not determine value.

Unit data

Full specifications

Wattage, efficiency, platform size, electrical outputs, connectors, cooling, and value in one technical sheet.

General

Manufacturer: Seasonic
PSU: Seasonic Focus GX-850 White
Launch price: —
Amazon price: $165
Amazon availability: Available
Price updated: Aug 30, 2026

Power & efficiency

Wattage: 850 W
Efficiency: 80 PLUS Gold
Recorded efficiency: 90%
Warranty: 10 years

Value

Amazon price: $165
Price / kW: $193.59
Capability: 76.9
Capability / price: 46.7
Wattage value: 41.3

Platform & size

ATX generation: 3.0
Form factor: ATX
Dimensions: 140 × 150 × 86 mm
Modular: Yes
Fanless: No

Electrical

Input voltage: 100-240
+12V output: 70 A
+5V output: 20 A
+3.3V output: 20 A
+12V rails: 1
Max amps / rail: 70.00 A

Cooling & build

Fan size: 120 mm
Fan stop: Yes
Certifications: 80 PLUS®Gold

Additional information

Also listed as: Focus GX-850 White
Color: White

Amazon

Price history

Nearby capability

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Power supplies close to Seasonic Focus GX-850 White on calculated capability. Open the PSU table to sort, filter, and compare side by side.

MSI MSI MAG A850GL 850 W · ATX · Modular

76.9

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MSI MSI MPG A850G 850 W · ATX · Modular

76.9

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Seasonic Seasonic Focus GX-850 White This PSU

76.9

46.7

41.3

$165

Seasonic Seasonic Focus V4 GX-850 850 W · ATX · Modular

76.9

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Thermaltake Thermaltake GF1 (2024) Fully Modular ATX 850W 850 W · ATX · Modular

76.9

88.4

78.2

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Thermaltake Thermaltake Toughpower GF A3 850W 850 W · ATX · Modular

76.9

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Thermaltake Thermaltake Toughpower GF3 ATX 3.0 850W 80+ Gold Full Modular 850 W · ATX · Modular

76.9

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Lian Li Lian Li EDGE Gold 850W 850 W · ATX · Modular

76.9

64.1

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MSI MSI MPG A850GS 850 W · ATX · Modular

76.9

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Compare these in the PSU table

Discussion

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Vendor copy

Amazon listing details

Marketplace feature text kept for reference. Structured specifications above are the source for scores and comparisons.

High Efficiency & Performance: 80 PLUS Gold Certified, tight voltage regulation (±3%), and ample +12V output.

Advanced Cooling & Silent Operation: 135mm Fluid Dynamic Bearing (FDB) fan with Seasonic Hybrid Silent Fan Control.

Optimized Design & Build: OptSink design, compact 140mm size, and highly reliable Japanese 105°C aluminum electrolytic capacitors.

Modular & Durable Connectivity: Fully modular cabling, ATX 3 & PCIe Gen 5 (12V-2x6) support, gold-plated high-current terminals, and PVC embossed cables.

Premium Quality & Reliability: DC-to-DC converter, cable-free connection design, and long-term durability with a 10-year warranty.

Seasonic Focus GX-850 White at a glance

Platform and cooling

Current value

General

Power & efficiency

Value

Platform & size

Electrical

Cooling & build

Additional information

Price history

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