Skip to main content
Seasonic Focus GX-1000 1000W Power Supply ATX 3.1 & PCIe 5.1 Ready | 80 Plus & Cybenetics Gold Fully Modular 12V-2x6 RTX 5090 AMD RX 9000 Ready Premium Japanese Capacitors 10 Years Warranty
Seasonic

Seasonic Focus GX-1000 1000W Power Supply ATX 3.1 & PCIe 5.1 Ready

Bottom line: The Seasonic Focus GX-1000 1000W Power Supply ATX 3.1 & PCIe 5.1 Ready ($199.00 on Amazon as of 2026-10-20 20:20 UTC): Native 12V-2x6 connector, ATX 3.1/PCIe 5.1 ready for RTX 5090 and RX 9000; main trade-off: 1000W is overkill for mid-range builds under 300W draw. Another in-stock pick with the same 1000W 80 Plus Gold fully modular ATX power supply: the Corsair RMX Series, $234.99 on Amazon as of (price may vary).

$199.00

As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →

Buy on Amazon — $199.00 Also on eBay → Compare to similar power supplies

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Native 12V-2x6 connector, ATX 3.1/PCIe 5.1 ready for RTX 5090 and RX 9000
  • ✓ 10-year warranty, longest in the Seasonic Focus line
  • ✓ Cybenetics Gold and 80 PLUS Gold certified efficiency
  • ✓ Hybrid fan mode keeps the 135 mm FDB fan silent at low loads
  • ✓ Fully modular cabling, so unused leads stay out of the case

Cons

  • ✗ 1000W is overkill for mid-range builds under 300W draw
  • ✗ Gold, not Platinum or Titanium, efficiency tier
  • ✗ Hybrid mode fan stop can let heat soak in cramped cases
  • ✗ Full-size ATX unit is a tight fit in SFF and compact chassis

Related Products

Other products in this category you may like:

SpecPicks Verdict

SpecPicks scored Seasonic Focus GX-1000 1000W Power Supply ATX 3.1 & PCIe 5.1 Ready 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

  • ATX 3.1 / PCIE 5.1 ready. Native 12V-2x6 connector
  • 80 PLUS and Cybenetics Gold certified
  • OptiSink Design
  • NVIDIA RTX 5090 AMD RX 9000 ready
  • Hybrid fan control with 135 mm FDB fan

Full Specifications

BrandSeasonic
Wattage1000 watts
Model NameFocus GX-1000 ATX 3.1
Form FactorATX
Model NumberFocus GX-1000 ATX 3.1
Connector TypeATX
Cooling MethodAir
Number of Fans1
Output Wattage1000 watts
Item Dimensions5.5 x 5.9 x 3.4 inches
Mfr Part NumberFocus GX-1000 ATX 3.1
Number of Items1
Compatible DevicesDesktop
Connector Quantity14
Power Supply DesignFull Modular
Warranty Description10 Year Manufacturer
Maximum Input Voltage132 volts_of_alternating_current
Minimum Input Voltage90 volts_of_alternating_current
Item dimensions L x W x H5.5 x 5.9 x 3.4 inches
System Bus Connector TypeATX
Full listing titleSeasonic Focus GX-1000 1000W Power Supply ATX 3.1 & PCIe 5.1 Ready | 80 Plus & Cybenetics Gold Fully Modular 12V-2x6 RTX 5090 AMD RX 9000 Ready Premium Japanese Capacitors 10 Years Warranty

Ready to buy?

Seasonic Focus GX-1000 1000W Power Supply ATX 3.1 & PCIe 5.1 Ready | 80 Plus & Cybenetics Gold Fully Modular 12V-2x6 RTX 5090 AMD RX 9000 Ready Premium Japanese Capacitors 10 Years Warranty is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $199.00

*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.

Related Power Supplies

Keep exploring SpecPicks

Other buying guides

Browse the catalog

Editorial

More guides & deep dives from the SpecPicks archive

Browse all articles & guides →

More reviews from the SpecPicks archive

Browse all reviews →

Earliest SpecPicks reviews

Browse full archive →
Seasonic Focus GX-1000 1000W Power Supply ATX 3.1 & PCIe 5.1 Ready | 80 Plus & Cybenetics Gold Fully Modular 12V-2x6 RTX 5090 AMD RX 9000 Ready Premium Japanese Capacitors 10 Years Warranty
$199.00
View on Amazon →