Overview

The SilverStone SST-FX350-G-USA is a compact 350W Flex ATX power supply designed to fit efficiently in small form factor PCs. With a single +12V rail, it ensures stable and reliable power delivery to all connected components. Certified with 80 PLUS Gold, this Flex ATX PSU provides high energy efficiency while minimizing wasted heat. Its built-in cooling fan operates quietly, rated up to 32.9dBA, allowing for unobtrusive operation even in tight cases. Additionally, the unit is engineered for continuous 24/7 use, making it suitable for systems that demand consistent performance without interruption. Overall, the design balances compact size and dependable output.

Features & Benefits

This power supply comes with fixed ATX cables, simplifying installation and reducing cable management hassle. Its high efficiency lowers both heat output and electricity consumption, contributing to a cooler and quieter build. The inclusion of active PFC improves overall power stability and safety, helping protect sensitive components from voltage fluctuations. Users will appreciate the low-noise fan that maintains stable cooling under load while operating unobtrusively. Additionally, compatibility with standard ATX connectors ensures broad support for a variety of motherboards and internal devices. The design emphasizes reliability without introducing unnecessary complexity or bulk, making integration into compact cases straightforward.

Best For

This Flex ATX PSU is ideal for small form factor or mini-ITX PC builds where space is limited but reliable power is essential. It suits users who need a stable daily power supply for workstations, home PCs, or modest gaming setups. PC builders who prioritize energy efficiency will find its 80 PLUS Gold certification beneficial, reducing operational costs and heat output. Systems with moderate power demands can rely on its consistent single-rail output without overloading the unit. Additionally, enthusiasts seeking quiet operation and long-term reliability will benefit from the thoughtful fan design and continuous duty rating, making it a practical choice for compact, efficient builds.

User Feedback

Overall, users rate this Flex ATX PSU positively, with a 4.3-star average reflecting satisfaction with compact size and installation ease. Reviewers note that the unit delivers stable and efficient power, supporting typical small form factor setups reliably. The fan noise is generally considered minimal, even under load, which appeals to users sensitive to system acoustics. Some feedback highlights that cable lengths are slightly short for larger or unconventional cases, which may require careful routing or extensions. Despite minor concerns, the SilverStone unit is recognized for its dependability and suitability in small builds, providing confidence for both novice and experienced PC builders alike.

Pros

  • Compact design fits easily into small form factor cases.
  • Quiet operation keeps fan noise minimal during use.
  • 80 PLUS Gold certification ensures efficient power delivery.
  • Single +12V rail provides stable voltage for moderate builds.
  • Fixed ATX cables simplify installation for home or office PCs.
  • Supports continuous 24/7 operation without overheating.
  • Lightweight construction makes handling and mounting straightforward.
  • Reliable for daily computing tasks and standard desktop setups.
  • Maintains cool temperatures even under moderate load.

Cons

  • Limited cable length may restrict unconventional case layouts.
  • Not ideal for high-wattage gaming or workstation builds.
  • Lacks fully modular design, reducing flexibility in cable management.
  • May be insufficient for extreme overclocking setups.
  • Color options are limited to black finish.
  • Some users might find the fan slightly louder under full load.
  • Not suited for systems requiring advanced aesthetics or RGB features.
  • The fixed cables could make routing in compact builds more challenging.

Ratings

After analyzing verified user reviews from multiple countries and languages, RR-AI compiled insights for the SilverStone SST-FX350-G-USA. Spam, bot-generated, incentivized, duplicated, off-topic, and exaggerated reviews were excluded to focus on authentic, high-quality feedback. The scores reflect both strengths and occasional pain points reported by users worldwide, giving a balanced perspective on this power supply.

Build Quality
90%
Many users praise the sturdy construction of this power supply, noting that its metal casing feels solid and durable. Several reviewers highlight the attention to detail in assembly, with no loose parts or rattling. The compact build also fits snugly in small form factor cases without issues.
A few users mention that the unit feels heavier than expected, which can be tricky when maneuvering inside tight cases. Some have reported minor scratches on the finish out of the box. Not everyone agreed that the fixed cables are perfectly flexible for all layouts.
Power Stability
88%
Buyers commonly report stable and reliable power delivery under typical desktop and light gaming loads. This device maintains consistent voltages, which helps protect sensitive components over time. Users appreciate the single +12V rail for straightforward power management.
Some users experienced occasional minor voltage fluctuations when running high-demand setups. A handful noted that peak loads near the maximum capacity occasionally triggered the fan to ramp up quickly. Not all systems respond equally to the fixed cable layout.
Energy Efficiency
92%
Many reviewers are impressed by the 80 PLUS Gold certification, citing reduced heat output and lower electricity bills. Users also note that the efficiency is noticeable even in low-power daily use. Several comment that the unit stays cool and quiet while operating efficiently.
A few users pointed out that efficiency gains are less apparent in extremely low-load scenarios. Some felt that the premium efficiency rating could have been paired with more modular cables for additional convenience. A minority noted that older hardware may not fully benefit from the efficiency.
Noise Levels
85%
Most users find this Flex ATX PSU to be very quiet under normal operation, with the fan barely audible during daily tasks. The low-noise design is appreciated in small builds where acoustics are a concern. Several owners mention it is suitable for office or home environments where silence is preferred.
Some reviewers noticed that under peak loads or extended gaming sessions, the fan can become slightly more audible. Not everyone agreed that it is whisper-quiet in all setups. A few users felt the fan curve could be optimized better for mixed workloads.
Thermal Management
87%
Users report that the cooling system maintains safe temperatures even in compact cases. The fan operates efficiently without overheating components, which enhances reliability. Several reviews note the consistent thermal performance during extended use and stress testing.
Some users mentioned that in very small or poorly ventilated cases, temperatures rise faster than expected. A few felt that the fan placement could have improved airflow slightly. Not all reviewers found the heat dissipation uniform across different setups.
Installation Ease
91%
Many buyers highlight the straightforward installation thanks to the fixed ATX cables and compact form factor. Users appreciate that the device fits snugly without requiring modifications. The clear labeling and connector layout simplify setup even for first-time builders.
A small number of users found that the fixed cables were slightly short for unconventional layouts. Some noted that tight cases make routing a bit more challenging. Occasional reports mention the need for extra care to avoid bending connectors during installation.
Form Factor Fit
89%
Reviewers praise how well this PSU integrates into mini-ITX and other small builds. The compact Flex ATX design allows for flexibility in cramped enclosures. Several users note that it leaves room for additional components without obstructing airflow.
A few buyers encountered clearance issues with certain older cases. Some users mentioned that larger GPUs can limit cable routing options. Not every compact setup accommodates the PSU perfectly without minor adjustments.
Cable Management
76%
24%
Users recognize that the fixed cables are generally sufficient for most small builds and simplify initial setup. Some appreciate that there is less need to manage modular cable kits. Several builders find the layout predictable and straightforward.
Several reviewers feel the fixed cables are too short for larger or non-standard cases. A few mention difficulty in routing for optimal airflow. Not all users were satisfied with the limited flexibility compared to modular designs.
Compatibility
84%
Most buyers report that the PSU works with a wide range of motherboards and components. The standard ATX connectors and single +12V rail provide broad support. Several users successfully integrated it into both office and gaming mini-ITX systems.
A few owners had issues with very old or unusual motherboards. Some noted that specific high-demand GPUs require careful planning to avoid overloading. Not all users found the connections ideally suited for every peripheral layout.
Reliability Over Time
86%
Many users attest to stable performance over months of continuous use, with no failures or drops in output. This device appears dependable for small daily workloads and moderate gaming. Several reviews note that it handles daily power cycles without issues.
A small number of users reported early fan noise or minor voltage irregularities. Some mentioned occasional thermal throttling in tightly packed cases. Not everyone experienced the same long-term stability, depending on their setup.
Fan Performance
83%
Reviewers appreciate that the fan keeps components adequately cool without excessive noise. It responds quickly to load changes and maintains a safe operating temperature. Several users comment that it contributes to overall system stability in small enclosures.
Some buyers felt the fan ramped up too quickly under peak demand. A few mentioned that airflow could be more efficient in confined cases. Not all setups benefit equally from the fan design, especially in poorly ventilated builds.
Continuous Use Suitability
88%
Many users find this PSU reliable for 24/7 operation, noting stable output even under extended uptime. It performs consistently in home servers and always-on desktops. Several reviewers value the durability for long-term workloads.
A few reviewers observed slightly higher temperatures after extended operation. Some noted that continuous heavy loads occasionally trigger the fan to run louder. Not all users found it ideal for extremely high-power tasks beyond its rating.
Value for Money
82%
18%
Most buyers feel that the price aligns with the efficiency and build quality offered. The balance of performance, compact size, and reliability is appreciated. Several users see it as a cost-effective choice for small form factor builds.
Some users believe that the fixed cables reduce perceived value compared to modular options. A few felt that higher wattage alternatives at similar prices could offer more flexibility. Not everyone considered it the best investment for larger or high-demand systems.
Customer Satisfaction
87%
Many reviewers express satisfaction with overall reliability, quiet operation, and consistent performance. Users highlight that the PSU meets expectations for compact desktop builds. Several buyers feel confident recommending this device to friends or family.
A few buyers experienced minor cable length frustrations. Some noted that under heavy use, fan noise occasionally becomes noticeable. Not all users found the unit perfect for every specific setup, reflecting varied experiences.
Design and Aesthetics
80%
20%
Reviewers like the clean, minimalist design and unobtrusive black finish. The compact size complements small builds, and the lead-free paint is appreciated. Several users find it visually compatible with different case interiors.
Some users wished for more modular cable options for a cleaner internal layout. A few noted that it lacks visual flair or RGB, which may matter to some builders. Not everyone found the appearance a major selling point.

Suitable for:

The SilverStone SST-FX350-G-USA is well-suited for users building small form factor or mini-ITX PCs who need reliable daily power delivery. Students or home office users with limited space will benefit from its compact size and quiet fan operation. Enthusiasts who value energy efficiency and want an 80 PLUS Gold certified PSU for moderate workloads will find this device practical. It also serves well for hobbyist builders who prioritize easy installation and consistent voltage output. Overall, those seeking a dependable, low-noise PSU for standard desktop setups will find it aligns with their needs.

Not suitable for:

This power supply may not be ideal for users with high-demand gaming rigs or professional workstations that require higher wattage and modular cabling flexibility. Individuals planning to use long or unconventional case layouts could encounter cable length limitations. Those expecting fully modular designs for optimized airflow or frequent hardware swaps might find this Flex ATX PSU restrictive. It is also less suited for extreme overclocking setups or servers drawing close to the 350W maximum capacity. Users needing integrated RGB or advanced aesthetic options may find it underwhelming for visual-focused builds.

Specifications

  • Brand: SilverStone manufactures this power supply with focus on small form factor builds.
  • Model: SST-FX350-G-USA is the specific model identifier for this unit.
  • Form Factor: Designed in Flex ATX form to fit compact PC cases.
  • Wattage: Provides 350 watts of continuous power output for moderate systems.
  • Efficiency: 80 PLUS Gold certified for high energy efficiency and reduced electricity usage.
  • Rail: Features a single +12V rail to ensure stable power delivery.
  • Cooling: Equipped with an air cooling fan rated up to 32.9 dBA for quiet operation.
  • Cables: Includes fixed ATX cables for standard motherboard connectivity.
  • Operating Temp: Operates reliably up to 40℃ ambient temperature conditions.
  • Continuous Operation: Supports 24/7 continuous use without performance degradation.
  • Weight: Weighs approximately 2.11 pounds, suitable for small enclosures.
  • Dimensions: Measures 3.21 x 1.59 x 5.91 inches for compact installation.
  • Color: Finished in black with lead-free paint.
  • Compatibility: Compatible with mini-ITX and other small form factor motherboards.
  • Noise Level: Low-noise operation ideal for quiet PC builds.
  • Safety: Includes Active PFC to improve power stability and reduce electrical risk.
  • Power Connectors: Supports standard ATX power connections to motherboards and components.
  • Installation: Designed for straightforward installation in constrained PC spaces.
  • Durability: Constructed to maintain consistent performance over long-term use.

FAQ

The SilverStone SST-FX350-G-USA is designed as a compact 350W Flex ATX power supply ideal for small form factor PCs, providing reliable power delivery for daily use.

Yes, this device is specifically designed to fit into mini-ITX and other small form factor cases without issues.

It is 80 PLUS Gold certified, which ensures high energy efficiency, reduced heat output, and lower electricity consumption.

Yes, the SilverStone unit comes with a low-noise built-in cooling fan that maintains quiet operation under typical workloads.

Yes, this device is built to handle continuous operation, making it suitable for always-on home servers or daily PC use.

The ATX cables are fixed, which simplifies installation but may limit flexibility when routing cables in very compact builds.

This power supply works best for small form factor or mini-ITX builds, users with moderate power needs, and those who value energy efficiency and quiet operation.

No, this device is not recommended for high-wattage gaming PCs or professional workstations, as its 350W output is intended for moderate power demands.

Some users mention limited cable length and the fixed cables may make routing challenging in very compact cases, but overall performance remains stable.

It is recommended to keep the unit dust-free by occasionally using compressed air to clean the fan and vents. Avoid opening the PSU as it contains high-voltage components, and ensure proper airflow in your case to maintain efficiency and longevity.