SilverStone
SX1000 Platinum
Best high-wattage power supply for compact, high-performance gaming builds.
The SilverStone SX1000 Platinum is a 1000W SFX-L power supply designed for high-performance, compact PC builds. It offers exceptional 80 PLUS Platinum efficiency, minimizing energy waste and heat. This fully modular unit simplifies installation with flexible, flat cables for a clean build. Featuring premium Japanese capacitors and a robust single +12V rail, it ensures outstanding stability for demanding components and overclocking. The integrated 120mm fan provides quiet operation with a semi-fanless mode for silent performance under lighter loads, ideal for powerful, whisper-quiet systems.
$299.99
Owner Satisfaction
4.6
/ 5
Category Rank
197
/ 1062
#197 in Computer Power Supplies
Price vs Category Average
-68%
Below average
Wattage Output
1000
/ W
Who it's for
- SFF enthusiasts building high-performance, compact gaming rigs
- Power users prioritizing energy savings and reduced heat output
- Quiet-focused builders needing efficient cooling in small spaces
Who should skip it
- Novice builders struggling with tight, cramped cable management
- Builders using ultra-compact cases with strict length limitations
- Budget-conscious shoppers prioritizing value over premium efficiency
Performance breakdown
Power Density
Unmatched wattage output packed into a remarkably compact SFX-L footprint.
Energy Efficiency
Platinum certification ensures minimal heat output and superior power conversion.
Acoustic Performance
Semi-fanless operation keeps your workspace whisper-quiet during light computing tasks.
Cable Management
Fully modular design with flat cables simplifies routing in tight enclosures.
Component Reliability
Japanese capacitors provide the long-term stability required for high-end hardware.
System Compatibility
Abundant PCIe and CPU connectors support even the most demanding builds.
Key Specs
Wattage Output
1000W
Efficiency Certification
80 Plus Platinum
Form Factor
SFX
Dimensions
125 mm (W) x 63.5 mm (H) x 130 mm (D)
Fan Size
120mm
Input Voltage
90V ~ 264V
Modularity
Fully Modular
Cable Type
Flat
Features
- SFX-L form factor for compact builds
- 1000W continuous power for demanding systems
- 80 PLUS Platinum high efficiency
- Silent 120mm fan with semi-fanless mode
- Fully modular with flexible flat cables
- Stable voltage regulation for reliability
- Powerful single +12V rail support
- Premium Japanese capacitors for longevity
What customers say
Users overwhelmingly praise the SilverStone SX1000 Platinum for delivering 1000 watts of stable power in the compact SFX L form factor, making it essential for high-performance small PC builds. Its 80 PLUS Platinum efficiency and fully modular cabling are frequently highlighted as major benefits for managing heat and tight spaces. While the premium price is noted, most agree the unique combination of size and power justifies the investment. Minor criticisms include stiff cables and occasional noise under extreme load. Overall, it is regarded as a top tier component for specialized, high-end compact systems.
Know before you buy
Yes, the SX1000 Platinum is an SFX-L unit, which is smaller than a standard ATX power supply. It will fit in most ATX cases, though you may need an SFX-to-ATX adapter bracket, which is often included with the unit or available separately.
The semi-fanless mode keeps the 120mm fan off during low-load scenarios to ensure silent operation. The fan will automatically spin up once the power supply reaches a certain temperature or load threshold to maintain optimal cooling.
With 1000W of continuous power and a robust single +12V rail, this unit is designed to handle high-performance components, including power-hungry GPUs. However, you should verify the total power draw of your specific hardware configuration to ensure it stays within the 1000W limit.
The cables are designed primarily for compact SFX builds, where excess cable length can be a hindrance. If you are using a full-tower ATX case, you may find the cables slightly short, so it is worth checking your case dimensions before installation.
This certification indicates that the power supply is highly efficient, converting more electricity into usable power for your components rather than wasting it as heat. This results in lower electricity costs, less heat buildup in your case, and quieter overall operation.
Because this unit is fully modular, you can technically use custom cables. However, you must ensure that any aftermarket cables are specifically pinned for this exact SilverStone model to avoid damaging your components.
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