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FSP FlexGURU 300W Flex ATX Power Supply | 80 Plus Gold PSU, For SFF PC, IPC & NAS System, Fully Modular, Japanese Capacitors, 5-Year Warranty, FSP300-50FCP
FSP

FSP FlexGURU 300W Flex ATX Power Supply (FSP300-50FCP)

Bottom line: The FSP FlexGURU 300W Flex ATX Power Supply is a specs-and-price decision rather than a crowd-consensus one in the power supplies 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, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

Pros & Cons

Pros

  • ✓ Backed by FSP'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

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SpecPicks Verdict

SpecPicks scored FSP FlexGURU 300W Flex ATX Power Supply using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. FSP'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

  • 80 PLUS GOLD 300W FLEX-ATX PSU: Delivers reliable power with up to 90% efficiency at typical loads. This reduces heat output and energy consumption, lowering operating costs while maintaining stable system performance
  • FULLY MODULAR DESIGN: Keep your SFF build clean and cool. The fully modular design with all-black ribbon cables simplifies installation by allowing you to use only the cables you need. This improves internal airflow and provides a clean, professional aesthetic without the clutter
  • FIRM INSTALLATION AND HIGH COMPATIBILITY: Equipped with a special mounting hole design, auxiliary brackets, and a universal mounting bracket, the FlexGuru series easily fits most Flex-ATX chassis on the market and can be seamlessly transformed into an IPC power supply
  • PREMIUM JAPANESE ELECTROLYTIC CAPACITORS: Built for uncompromising 24/7 continuous operation. High-quality Japanese main capacitors ensure rock-solid durability, proven by industrial users to withstand hot, dusty, and high-humidity environments with exceptional long-term reliability
  • COMPREHENSIVE INDUSTRIAL-GRADE SAFETY: Equipped with robust safeguards including UVP, OVP, SCP, OPP, and OTP, providing a secure and stable power foundation for Edge Computing, NAS arrays, HTPC setups, and POS terminals
  • QUIET OPERATION AND LOW NOISE: Operating with noticeably lower noise levels than standard server power supplies, making it suitable for office or hallway setups where quiet performance is essential

Full Specifications

BrandFSP
Wattage300 watts
Form FactorFlex ATX
Model NumberPPA3004302
CompatibilityPC
Connector TypeATX, FLEX ATX
Cooling MethodAir
Number of Fans1
Output Wattage300 watts
Item Dimensions5.91 x 1.59 x 3.21 inches
Mfr Part NumberPPA3004302
Number of Items1
Compatible DevicesEdge Computer, Industrial PC, NAS Server, PC, Surveillance
Connector Quantity4
Power Supply DesignFull Modular
Warranty Description5 Year Warranty
Maximum Input Voltage240 volts_of_alternating_current
Minimum Input Voltage100 volts_of_alternating_current
Item dimensions L x W x H5.91 x 1.59 x 3.21 inches
System Bus Connector Type20+4 Pin
Full listing titleFSP FlexGURU 300W Flex ATX Power Supply | 80 Plus Gold PSU, For SFF PC, IPC & NAS System, Fully Modular, Japanese Capacitors, 5-Year Warranty, FSP300-50FCP

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FSP FlexGURU 300W Flex ATX Power Supply | 80 Plus Gold PSU, For SFF PC, IPC & NAS System, Fully Modular, Japanese Capacitors, 5-Year Warranty, FSP300-50FCP 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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FSP FlexGURU 300W Flex ATX Power Supply | 80 Plus Gold PSU, For SFF PC, IPC & NAS System, Fully Modular, Japanese Capacitors, 5-Year Warranty, FSP300-50FCP
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