SilverStone
SX700-LPT
Best high-efficiency power supply for compact, quiet gaming PC builds.
The SilverStone SX700-LPT is a high-performance 700W power supply designed for small form factor PCs. It utilizes the SFX-L form factor, allowing for a larger 120mm fan that ensures quieter operation and better heat dissipation. With 80 PLUS Platinum certification, it offers exceptional energy efficiency. This fully modular unit features flexible flat cables for easy cable management and all Japanese capacitors for enhanced reliability and longevity. Its advanced semi-fanless capability provides silent operation at lower loads, making it an ideal choice for quiet, powerful small builds.
$191.00
Owner Satisfaction
4.5
/ 5
Category Rank
321
/ 1062
#321 in Computer Power Supplies
Price vs Category Average
-80%
Below average
Maximum Continuous Power Output
700750
/ W (Peak W)
Who it's for
- Eco-conscious users looking to lower long-term electricity bills
- SFF enthusiasts building high-performance gaming rigs or workstations
- Quiet-focused builders who prioritize a silent workspace environment
Who should skip it
- Budget-conscious shoppers seeking a more affordable power solution
- Users with ultra-compact cases requiring strict standard SFX dimensions
- Builders struggling with tight cable routing in cramped enclosures
Performance breakdown
Energy Efficiency
Platinum certification ensures minimal power waste during high-intensity gaming sessions.
Acoustic Performance
Large 120mm fan and semi-fanless mode keep noise levels impressively low.
Cable Management
Fully modular design with flat cables simplifies routing in cramped cases.
Build Reliability
Premium Japanese capacitors provide long-term stability for high-end hardware components.
Form Factor Utility
SFX-L footprint balances compact size with superior cooling capabilities.
Power Headroom
Robust 700W output easily handles demanding multi-GPU or overclocked configurations.
Key Specs
Maximum Continuous Power Output
700W (Peak 750W)
Form Factor
SFX-L
Efficiency Certification
80 PLUS Platinum
Cooling System
Single 120mm silent fan (FDB)
Dimensions
125 mm (W) x 63.5 mm (H) x 130 mm (D)
Input Voltage Range
90V ~ 264V
Protection Features
Over Voltage Protection, Under Voltage Protection, Over Power Protection, Short Circuit Protection, Over Current Protection, Over Temperature Protection
Warranty
5 Years
Features
- SFX-L form factor for enhanced cooling
- 80 PLUS Platinum certified for high efficiency
- Silent 120mm FDB fan with semi-fanless mode
- Fully modular with flexible flat cables
- All Japanese capacitors for superior reliability
- Stable power delivery with strict voltage regulation
- Supports multiple high-end GPU configurations
- Designed for 24/7 continuous operation
What customers say
PC builders highly favor the SilverStone SX700-LPT for Small Form Factor systems, focusing on its power density and compact size. Delivering 700 watts in the SFX-L format is a major advantage for powerful builds. Users consistently praise the 80 PLUS Platinum efficiency, which supports quiet operation, often noting the fan remains nearly silent during standard use. A key highlight is the fully modular, low profile cables, which significantly simplify cable management in tight cases, enhancing the overall build experience. While priced at a premium, the consensus is that the exceptional power, efficiency, and thoughtful design justify the cost for uncompromising SFF performance.
Know before you buy
While standard SFX power supplies are very compact, the SFX-L form factor is slightly longer. This extra depth allows the SX700-LPT to house a larger 120mm fan, which provides better cooling and quieter operation compared to the smaller fans typically found in SFX units.
Yes, it will. The SX700-LPT is designed for small form factor builds, but it includes an adapter bracket that allows it to be mounted in standard ATX cases if needed.
The unit features a semi-fanless mode, meaning the 120mm fan will remain off during low-load scenarios to ensure silent operation. The fan will only spin up once the power supply reaches a certain temperature or load threshold.
The cables are designed specifically for compact builds and are flexible and flat to assist with cable management. However, if you are using a larger case, you may want to verify your specific cable routing path, as these cables are optimized for shorter distances.
Yes, with 700W of continuous power and four PCIe connectors, this unit is capable of supporting most high-end single or dual GPU setups. Always ensure your total system power draw remains within the 700W limit for stable performance.
80 PLUS Platinum certification indicates that the power supply is highly efficient, converting more energy from your wall outlet into usable power for your components with less heat waste. This results in lower energy consumption and less heat generated inside your PC case.
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$191