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Rectangular black ATX power supply with gold certification badge and modular cable sockets visible

Seasonic

Seasonic FOCUS GX ATX 3 (2024) GX-1000 1000 W power supply

SKU CH-7QJ7-65SQT MPN FOCUS GX ATX 3 (2024) GX-1000

Full-modular ATX 3.1 unit delivers 1000 W with an 80 PLUS Gold rating and a 135 mm fluid-dynamic-bearing fan

  • TypeATX 3.1
  • Maximum Power1000 W
  • Fans1 x 135 mm Fluid Dynamic Bearing (FDB) Fan
  • Max PSU Length150 mm
  • ModularFull Modular
  • Energy-Efficient80 PLUS GOLD Certified

Options ATX 3.1 80+ Gold (1000W) Black

  • 1000 W output powers demanding builds
  • ATX 3.1 design supports modern graphics cards
  • 80 PLUS GOLD certification cuts wasted energy
  • Full modular cabling keeps the case tidy
  • 135 mm FDB fan runs quietly under load

1000 W ATX 3.1 power supply

The Seasonic FOCUS GX ATX 3 (2024) GX-1000 delivers 1000 W of continuous power through a fully modular ATX 3.1 design. An 80 PLUS GOLD rating confirms high efficiency across typical loads. A single 135 mm Fluid Dynamic Bearing fan handles cooling. The unit measures 140 mm long, 150 mm wide and 86 mm high.

Upgrade from older ATX units

Moving to this model adds native ATX 3.1 compliance and full modular cabling for cleaner builds. The 1000 W ceiling supports modern GPUs and multi-drive arrays without headroom concerns. The jump is worth it when your current supply lacks the 12V-2x6 connector or cannot sustain peak transient loads. Gold efficiency also reduces waste heat compared with Bronze or unrated units.

Check case depth and cable routing

Verify that your chassis accommodates a 150 mm wide power supply and the 140 mm depth allowance. Ensure the motherboard 24-pin, CPU 8-pin and PCIe 12V-2x6 cables reach their sockets without sharp bends. Confirm the rear mounting pattern matches standard ATX screw spacing. The 100-240 V input range works worldwide without a voltage switch.

Highlights

  • 1000 W output powers demanding builds
  • ATX 3.1 design supports modern graphics cards
  • 80 PLUS GOLD certification cuts wasted energy
  • Full modular cabling keeps the case tidy
  • 135 mm FDB fan runs quietly under load

Specifications

BrandSeaSonic
SeriesFOCUS GX ATX 3 (2024)
ModelGX-1000
TypeATX 3.1
Maximum Power1000 W
Fans1 x 135 mm Fluid Dynamic Bearing (FDB) Fan
Max PSU Length150 mm
ModularFull Modular
Energy-Efficient80 PLUS GOLD Certified
Input Voltage100 - 240 V
Input Frequency Range50/60 Hz
Dimensions140 mm (L) x 150 mm (W) x 86 mm (H)
Shipping weight2.72 kg
Package size305 × 185 × 114 mm

Other versions of this model

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Questions about this item

Will the 150 mm depth and 140 mm length fit my ATX case?

The unit measures 140 mm long by 150 mm wide by 86 mm high; verify your case clearance against those dimensions before buying.

Which cables must stay attached during a full-modular build?

No cables are fixed — every 24-pin, EPS, PCIe and peripheral lead plugs in at the PSU side, so connect only what your build needs.

How do I service the 135 mm FDB fan without voiding the seal?

The fan is internal; cleaning is limited to blowing dust through the exhaust grille with the system powered off and unplugged.

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