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Rectangular ATX power supply unit with matte black finish and modular cable sockets

Seasonic

Seasonic PRIME GX-1300 1300W 80+ Gold ATX power supply

SKU CH-8WB5-KZRG3 MPN PRIME GX-1300

A 1300 W ATX power supply with 80 PLUS Gold efficiency, full modular cabling, a 135 mm fluid dynamic bearing fan and twelve years of coverage

  • TypeATX12V / EPS12V
  • Maximum Power1300 W
  • Fans1 x 135 mm Fluid Dynamic Bearing Fan
  • Main Connector20+4Pin
  • +12V RailsSingle
  • PCI-Express Connector8 x 6+2-Pin

Options ATX Gold (1300W)

  • Delivers 1300 W continuous power for demanding multi-GPU builds
  • 80 PLUS Gold efficiency reaches 90 % at 50 % load
  • Fully modular cabling lets you connect only the cables you need
  • 135 mm fluid-dynamic-bearing fan runs quieter at lower speeds
  • 150000-hour MTBF at 25 °C indicates long-term reliability

1300W ATX Power Supply for High-Power Builds

The Seasonic PRIME GX-1300 is a 1300W ATX12V/EPS12V unit rated at 80 PLUS Gold efficiency. It uses a single +12V rail rated at 108A and includes a 135mm Fluid Dynamic Bearing fan. The fully modular design suits high-power desktop systems that need clean cable routing.

Check Case Length and Connector Needs

Verify that your chassis can accommodate a power supply up to 170mm in length. Ensure your motherboard accepts the 20+4 pin main connector and that your graphics cards can use the eight 6+2 pin PCI-Express connectors provided. The unit requires 100-240V AC input at 50/60Hz.

Suits Multi-GPU and Workstation Systems

This unit fits builds that demand high continuous output and tight voltage regulation for multiple GPUs or heavy compute loads. Systems with modest power requirements or very small form factor cases with strict length limits should consider lower-wattage or shorter alternatives.

Points forts

  • Delivers 1300 W continuous power for demanding multi-GPU builds
  • 80 PLUS Gold efficiency reaches 90 % at 50 % load
  • Fully modular cabling lets you connect only the cables you need
  • 135 mm fluid-dynamic-bearing fan runs quieter at lower speeds
  • 150000-hour MTBF at 25 °C indicates long-term reliability

Caractéristiques

BrandSeaSonic
SeriesPRIME Gold
ModelPRIME GX-1300 (SSR-1300GD)
TypeATX12V / EPS12V
Maximum Power1300 W
Fans1 x 135 mm Fluid Dynamic Bearing Fan
Main Connector20+4Pin
+12V RailsSingle
PCI-Express Connector8 x 6+2-Pin
SATA Power Connector16
Max PSU Length170 mm
ModularFull Modular
Energy-Efficient80 PLUS GOLD Certified
Over Voltage ProtectionYes
ProtectionOPP, OVP, UVP, OCP, OTP, SCP
Input Voltage100 - 240 V
Input Frequency Range50/60 Hz
Input Current15 - 7.5 A
Output+3.3V@25A, +5V@25A, +12V@108A, [email protected] , +5VSB@3A
MTBF150,000 hours MTBF @ 25 degree C, excl. fan
ApprovalscTUVus, TUV, CB, CCC, BSMI, EAC, Energy Star, RoHS, WEEE, ErP Lot 6, REACH
Connectors1 x 20+4-Pin ATX Motherboard (610mm)
2 x 4+4-Pin EPS CPU (1 Connector each cable, 2 x 650mm Cable)
8 x 6+2-Pin PCIe (2 Connector each cable, 1 x 750mm Cable; 1 Connector each cable, 6 x 750mm Cable)
8 x SATA (4 Connector each cable, 2 x 810mm Cable)
4 x SATA (4 Connector each cable, 1 x 860mm Cable)
2 x SATA (2 Connector each cable, 1 x 450mm Cable)
2 x Molex to SATA 3.3 Adapter (2 Connector each cable, 1 x 300mm Cable)
3 x 4-Pin Peripheral / Molex (3 Connector each cable, 1 x 690mm Cable)
2 x 4-Pin Peripheral / Molex (2 Connector each cable, 1 x 470mm Cable)
Features80 PLUS Gold certified
Micro Tolerance Load Regulation (0.5 %)
Cable-free Connection Design
Premium Hybrid Fan Control - Fanless until 40 % load
Multi-GPU setup
Gold plated connectors
Dimensions3.39" x 5.91" x 6.69"
Poids d’expédition4.15 kg
Dimensions du colis338 × 206 × 140 mm

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Questions sur cet article

Which cables are included with the PRIME GX-1300 and what must I buy separately?

The unit is fully modular and ships with a 20+4-pin ATX cable, eight 6+2-pin PCIe cables and sixteen SATA power cables; no extra cables are required for a standard build.

How do I decide between the Gold, Platinum and Titanium versions of the PRIME 1300 W series?

The Gold model delivers 90 % efficiency at 50 % load, the Platinum 92 % and the Titanium 94 %; choose Gold for strong value, Platinum for lower heat, or Titanium for maximum efficiency.

What does the 1300 W rating mean when the PSU is installed in a real system?

The single +12 V rail can supply 108 A continuously, so the full 1300 W is available to GPU and CPU together without multi-rail limits.

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