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Seasonic FOCUS PX-850 | 850W | 80+ Platinum | Full-Modular | ATX Form Factor | Low Noise | Premium Japanese Capacitor | 10 Year Warranty | Nvidia RTX 30/40 Super & AMD GPU Compatible (Ref. SSR-850PX)
Seasonic

Seasonic FOCUS PX-850 | 850W | 80+ Platinum | Full-Modular | ATX Form Factor | Low Noise | Premium Japanese Capacitor | 10 Year Warranty | Nvidia RTX 30/40 Super & AMD GPU Compatible (Ref. SSR-850PX)

By , Hardware Editor · Verified 2026-09-11

Mike Perry has researched PC hardware since 2014, tracking 80+ GPU generations, 50+ retro handheld platforms, and 30+ vintage PC configurations. He synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

$345.06

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View Current Price on Amazon → Compare to similar power supplies

*Price sourced from Amazon.com. Price and availability subject to change.

Bottom line: The Seasonic FOCUS PX-850 | 850W | 80+ Platinum | Full-Modular | ATX Form Factor | Low Noise | Premium Japanese Capacitor | 10 Year Warranty | Nvidia RTX 30/40 Super & AMD GPU Compatible (Ref. SSR-850PX) is a specs-and-price decision rather than a crowd-consensus one in the power supplies category, priced around $345.06. Check the specification table above against one or two close alternatives — on price and spec fit, not on star ratings.

Thanks to its small form factor the focus+ Platinum 850 watt power supply is a Mighty solution for those, who want to implement a smaller HTPC system or living room computer. This High quality unit is built with top-rated highly reliable aluminum electrolytic solid capacitors and it features Seasonic new cable-free connection design where the back panel and the PCB (printed circuit board) are connected by a copper plate. This premium design feature is a breakthrough solution that lowers the chance of production errors and improves output power quality.

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SpecPicks Verdict

SpecPicks scored Seasonic FOCUS PX-850 | 850W | 80+ Platinum | Full-Modular | ATX… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis across the power supplies category. Seasonic's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Pros & Cons

Pros

  • ✓ Voltage: 100 V - 240 V
  • ✓ Backed by Seasonic's warranty and support channels
  • ✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Key Features

  • Voltage: 100 V - 240 V
  • Current: 12 - 6 a
  • Frequency: 50 Hz - 60 Hz
  • Total continuous power: 850W
  • 80 plus Platinum

Full Specifications

BrandSeasonic
Current12 - 6 a
Voltage100 V - 240 V
Wattage850
Fan Size12 centimeters
Frequency50 Hz - 60 Hz
Model NameFOCUS Plus 850 Platinum
Unit Count1 Count
Form FactorATX12V
Model NumberSSR-850PX
Built-In MediaPower Supply
Connector TypeATX
Cooling MethodAir
Item Type NamePower Supply
Number of Fans1
Output Wattage850
Item Dimensions5.51 x 5.91 x 3.4 inches
Mfr Part NumberSSR-850PX
Compatible DevicesPersonal Computer
Power Supply DesignFull Modular

Ready to buy?

Seasonic FOCUS PX-850 | 850W | 80+ Platinum | Full-Modular | ATX Form Factor | Low Noise | Premium Japanese Capacitor | 10 Year Warranty | Nvidia RTX 30/40 Super & AMD GPU Compatible (Ref. SSR-850PX) is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Current Price on Amazon →

*Price sourced from Amazon.com. Price and availability subject to change.

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Seasonic FOCUS PX-850 | 850W | 80+ Platinum | Full-Modular | ATX Form Factor | Low Noise | Premium Japanese Capacitor | 10 Year Warranty | Nvidia RTX 30/40 Super & AMD GPU Compatible (Ref. SSR-850PX)
$345.06
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