Seasonic
SEASONIC FOCUS V4 GX-850-850W
Status: SEASONIC FOCUS V4 GX-850-850W - 80+ Gold…: Unavailable on Amazon as of . SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.
Bottom line: The SEASONIC FOCUS V4 GX-850-850W is a specs-and-price decision rather than a crowd-consensus one in the power supplies category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.
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Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives:
Similar: Seasonic Focus GX-850-850W - 80+ Gold - ATX 3.0… — $175.93 on Amazon as of 2026-10-06 12:20 UTC (price may vary).
Similar: FSP Dagger Pro 850W SFX Form Factor Power Supply — $159.99 on Amazon as of 2026-10-07 04:22 UTC (price may vary).
Similar: Seasonic Focus GX-850 850W Power Supply ATX 3.1… — $169.99 on Amazon as of 2026-10-06 12:20 UTC (price may vary).
Pros & Cons
Pros
- ✓ Fully Modular Cabling Design
- ✓ Backed by Seasonic's warranty and support channels
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated
Manufacturer description
High Efficiency, 80 PLUS® Gold Certified ATX 3 and 16-Pin PCIe Gen 5 Cable (12V-2x6) OptiSink Design Fully Modular Cabling Design Compact Size (140 mm) 135 mm Fluid Dynamic Bearing (FDB) Fan Seasonic Hybrid Silent Fan Control Highly Reliable Japanese 105 °C Aluminum Electrolytic Capacitors Tight Voltage Regulation (12 V, 5 V and 3.3 V) [± 3 %] Ample +12 V Output DC to DC Converter Design Cable-free Connection Design Gold-Plated High Current Terminals (MB, CPU and PCIe PVC Embossed Cable 10 Years Warranty
SpecPicks Verdict
SpecPicks scored SEASONIC FOCUS V4 GX-850-850W using a rating × review-volume × price-fit model applied to published specs and reviews 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 retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- Fully Modular Cabling Design
- Compact Size (140 mm)
- 135 mm Fluid Dynamic Bearing (FDB) Fan
- Seasonic Hybrid Silent Fan Control
- Highly Reliable Japanese 105 °C Aluminum Electrolytic Capacitors
Full Specifications
| Brand | Seasonic |
|---|---|
| Wattage | 850 watts |
| Model Name | FOCUS V4 GX-850 |
| Unit Count | 9.67 Ounce |
| Form Factor | ATX |
| Model Number | FOCUS V4 GX-850 |
| Built-In Media | Power Supply |
| Connector Type | ATX |
| Cooling Method | Air |
| Item Type Name | Power Supply |
| Number of Fans | 1 |
| Output Wattage | 850 watts |
| Item Dimensions | 5.5 x 5.9 x 3.4 inches |
| Mfr Part Number | 394362A4 |
| Number of Items | 1 |
| Compatible Devices | Laptop |
| Power Supply Design | Full Modular |
| Warranty Description | 10 Year Manufacturer |
| Maximum Input Voltage | 264 volts_of_alternating_current |
| Minimum Input Voltage | 120 volts_of_alternating_current |
| Full listing title | SEASONIC FOCUS V4 GX-850-850W - 80+ Gold - Full-Modular - ATX Form Factor - Premium Japanese Capacitor - 10 Year Warranty - Nvidia RTX 30/40 Super & AMD GPU Compatible (Ref. SRP-FGX851-A5A32SF) |
Ready to buy?
Amazon shows no buyable offer for SEASONIC FOCUS V4 GX-850-850W - 80+ Gold… at the last check. A similar in-stock product is Seasonic Focus GX-850-850W - 80+ Gold - ATX 3.0…. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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