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Seasonic SSP-300SUG 300W 80 PLUS Gold Flex ATX12V Power Supply w/ Active PFC
Seasonic

Seasonic SSP-300SUG 300W 80 PLUS Gold Flex ATX12V Power Supply w/ Active PFC

Bottom line: The Seasonic SSP-300SUG 300W 80 PLUS Gold Flex ATX12V Power Supply is a specs-and-price decision rather than a crowd-consensus one in the power supplies & cables category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ This is a Seasonic industrial power supply meeting important EMI, EMC and safety standards
  • ✓ Backed by Seasonic's warranty and support channels

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Manufacturer description

Seasonic SSP-300SUG 300W Flex ATX 80 Plus Gold Active PFC Power Supply

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SpecPicks Verdict

SpecPicks scored Seasonic SSP-300SUG 300W 80 PLUS Gold Flex ATX12V Power Supply using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies & cables category. Seasonic's power supplies & cables 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 & cables 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

  • This is a Seasonic industrial power supply meeting important EMI, EMC and safety standards
  • This unit is ATX 12 V v
  • 31 and EPS 12 V compliant with DC to DC converter design and important protection features
  • It features Active PFC (Power Factor Correction) circuit design and is 80 PLUS Gold efficiency rated, meaning that at 115 V AC input the unit can achieve up to 90 % efficiency at 50 % load

Full Specifications

BrandSeasonic
Wattage300 watts
Fan Count2
Model NameSSP-300SUG
Form FactorATX
Model NumberSSP-300SUG
Connector TypeATX
Cooling MethodAir
Number of Fans2
Output Wattage300 Watts
Mfr Part NumberSSP-300SUG
Compatible DevicesPersonal Computer
Maximum Input Voltage115 Volts
Minimum Input Voltage115 Volts
System Bus Connector TypeATX
Connector Type Used on CableATX

Ready to buy?

Seasonic SSP-300SUG 300W 80 PLUS Gold Flex ATX12V Power Supply w/ Active PFC 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.

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Seasonic SSP-300SUG 300W 80 PLUS Gold Flex ATX12V Power Supply w/ Active PFC
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