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Seasonic CORE GX-750W 750W Power Supply, ATX 3.1 & PCIe 5.1 Ready | 80 Plus Gold Certified, Fully Modular, 12V-2x6 Connectors, OptiSink Design, RTX 5060 Ti AMD RX 9000 Ready, 7-Years Warranty
Seasonic

Seasonic CORE GX-750W 750W Power Supply

Bottom line: The Seasonic CORE GX-750W 750W Power Supply ($114.99 on Amazon as of 2026-10-06): Native 12V-2x6 connector for ATX 3.1 / PCIe 5.1 graphics cards; main trade-off: 750W leaves limited headroom for flagship GPUs paired with high-end CPUs.

$114.99

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Buy on Amazon — $114.99 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 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Native 12V-2x6 connector for ATX 3.1 / PCIe 5.1 graphics cards
  • ✓ Carries both 80 Plus Gold and Cybenetics Platinum certification
  • ✓ Fully modular, so you only install the cables your build needs
  • ✓ Includes a 12V-2x6 to dual 8-pin PCIe cable for older GPUs
  • ✓ Backed by a 7-year manufacturer warranty

Cons

  • ✗ 750W leaves limited headroom for flagship GPUs paired with high-end CPUs
  • ✗ 80 Plus rating is Gold, not 80 Plus Platinum or Titanium
  • ✗ Listing gives no fan size, noise rating or fan-mode details
  • ✗ OptiSink design is marketed, but its cooling benefit isn't quantified

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SpecPicks Verdict

SpecPicks scored Seasonic CORE GX-750W 750W Power Supply 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 Gold and Cybenetics Platinum certified
  • OptiSink Design
  • NVIDIA RTX 5070 Ti AMD RX 9000 ready
  • 12V-2x6 to dual 8-pin PCIe cable included

Full Specifications

BrandSeasonic
Wattage750 watts
Model NameCore GX-750 ATX 3.1
Unit Count1 Count
Form FactorATX
Model NumberCore GX-750 ATX 3.1
Connector TypeATX
Cooling MethodAir
Number of Fans1
Output Wattage750
Item Dimensions5.5 x 5.9 x 3.4 inches
Mfr Part NumberCore GX-750 ATX 3.1
Compatible DevicesATX motherboards, PCIe 5.0 graphics cards, standard ATX power supplies, various storage drives, and expansion cards
Warranty Description7 years
Maximum Input Voltage240 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
Connector Type Used on CableATX
Global Trade Identification Number04711173878469
Full listing titleSeasonic CORE GX-750W 750W Power Supply, ATX 3.1 & PCIe 5.1 Ready | 80 Plus Gold Certified, Fully Modular, 12V-2x6 Connectors, OptiSink Design, RTX 5060 Ti AMD RX 9000 Ready, 7-Years Warranty

Ready to buy?

Seasonic CORE GX-750W 750W Power Supply, ATX 3.1 & PCIe 5.1 Ready | 80 Plus Gold Certified, Fully Modular, 12V-2x6 Connectors, OptiSink Design, RTX 5060 Ti AMD RX 9000 Ready, 7-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 — $114.99

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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Seasonic CORE GX-750W 750W Power Supply, ATX 3.1 & PCIe 5.1 Ready | 80 Plus Gold Certified, Fully Modular, 12V-2x6 Connectors, OptiSink Design, RTX 5060 Ti AMD RX 9000 Ready, 7-Years Warranty
$114.99
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