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Rectangular black ATX power supply unit with modular cable connectors visible

Seasonic

Seasonic Vertex GX-1000 1000W ATX power supply

SKU CH-QG28-VG042

Delivers 1000W through a fully modular ATX design with 80+ Gold efficiency

  • Max wattage1000 W
  • Product typeATX
  • 1000 W output powers demanding builds
  • 80+ Gold efficiency reduces energy waste
  • Modular cabling keeps the case tidy
  • ATX form factor fits standard chassis
  • 100 % functional quality verified by Seasonic

1000W ATX Power Supply for High-End Builds

The Seasonic Vertex GX-1000 delivers up to 1000W of continuous power in a standard ATX form factor. Its fully modular cable design allows you to connect only the leads your system requires. This unit suits enthusiasts assembling high-performance desktops or workstations that demand substantial, reliable power delivery.

80+ Gold Efficiency and 1000W Headroom

Rated at 80+ Gold, the supply maintains high efficiency across typical loads, reducing waste heat and electricity cost. The 1000W maximum output provides comfortable headroom for multi-GPU configurations, overclocked CPUs and dense storage arrays. Systems drawing significantly more than 1000W will exceed this unit's rated capacity.

Quiet Operation with Hybrid Fan Control

A hybrid fan control mode keeps the cooling fan stopped during low-load operation, eliminating noise at idle and light workloads. Under heavier demand the fan spins up progressively to maintain safe internal temperatures. The 80+ Gold rating ensures lower overall heat output compared to less efficient designs, aiding case thermals.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $108.99
Cheaper than about 63% of the 10,869 comparable items (median $142.99).
Max wattage 1000 W
Higher than about 70% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameSeaSonic USA
Part numberVertex GX-1000
Product typeATX
Power
Max wattage1000 W

Questions about this item

Will the 1000W ATX Vertex GX-1000 fit and power an older ATX chassis and motherboard I already own?

Yes, the ATX form factor matches standard cases and motherboards, and the modular cables let you connect only what the older hardware needs.

How can I verify the Vertex GX-1000 is delivering stable power after installation?

Power on the system, confirm it POSTs and runs under load without shutdowns, and listen for the fan operating normally.

Which cables come with the Vertex GX-1000 and what must I source separately?

The modular unit includes the essential ATX, CPU and PCIe cables; any specialised or extra-length cables are not supplied.

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