SilverStone
SilverStone SX1000 Platinum 1000W fully modular SFX-L power supply
Best high-wattage power supply for compact, high-performance PC builds.
Achieve high performance in compact builds with the SilverStone SX1000 Platinum power supply. This unit delivers a robust 1000W of continuous power, engineered for reliable 24/7 operation, even up to a 50°C ambient temperature. It utilizes the desirable SFX-L form factor, ideal for small form factor computers. Efficiency is guaranteed with 80 PLUS Platinum certification. Enjoy quiet performance from the 120mm dual ball bearing fan featuring advanced semi-fanless operation. The design includes 100% modular short cables with flexible flat arrays for clean routing and uses high-quality all-Japanese capacitors.
$299.99
Owner Satisfaction
4.7
/ 5
Category Rank
28
/ 1062
#28 in Computer Power Supplies
Price vs Category Average
-68%
Below average
Maximum Power
1000
/ W
Who it's for
- Small-form-factor builders powering high-end gaming rigs
- Efficiency-focused users managing heat in cramped builds
- System builders prioritizing clean airflow and easy cable routing
Who should skip it
- Budget-conscious builders seeking standard power supply value
- Owners of ultra-compact cases with limited internal clearance
- Noise-sensitive users running high-load workstation tasks
Performance breakdown
Power Density
Unmatched wattage output packed into a remarkably compact SFX-L footprint.
Energy Efficiency
80 PLUS Platinum rating ensures minimal energy waste during heavy loads.
Build Quality
Premium Japanese capacitors guarantee long-term reliability and stable power delivery.
Cable Management
Fully modular flat cables make routing simple in tight, cramped cases.
Acoustic Performance
Semi-fanless operation keeps your system whisper-quiet during light workloads.
Voltage Stability
Strict 3% regulation provides rock-solid power for sensitive high-end components.
Key Specs
Maximum Power
1000 W
Form Factor
SFX-L
Efficiency Certification
80 PLUS PLATINUM
Fan Size
1 x 120 mm
Modularity
Full Modular
Maximum PSU Length
130 mm
Operating Temperature
50°C
Voltage Regulation
Strict 3%
Features
- SFX-L form factor for compact builds
- Rated for reliable 24/7 continuous power output
- Advanced semi-fanless operation for silent running
- Strict 3% voltage regulation ensures stable power
- 100% modular short cables for clean installation
- High-quality construction with all Japanese capacitors
- Class-leading single +12V rail capability
- Top-tier efficiency with 80 PLUS Platinum rating
What customers say
The SilverStone SX1000 Platinum is highly praised for its groundbreaking power density, enabling high performance in compact SFF builds. Users value the Platinum efficiency for its minimal heat output and exceptionally quiet operation, often utilizing the semi-fanless mode. The fully modular design aids cable management. While the premium price is noted, the primary consideration is the SFX-L size; its slightly extended length requires careful case compatibility checks. Overall, this unit is viewed as an essential, top-tier component for builders needing high wattage in small form factors.
Know before you buy
Yes, it is compatible with standard ATX cases, though you will likely need an SFX-to-ATX adapter bracket to mount it properly. It is specifically designed for small form factor builds, so it is significantly more compact than a traditional ATX power supply.
The fan remains completely off during low-load scenarios, ensuring silent operation when you are just browsing or doing light tasks. Once the power supply reaches a certain temperature or load threshold, the 120mm fan engages to maintain optimal cooling.
These cables are specifically designed as short, flat arrays for compact builds to minimize clutter. If you are using a mid-tower or full-tower case, you may find the cables too short to reach components comfortably without extensions.
Absolutely. It is rated for 24/7 continuous power output and features high-quality Japanese capacitors, which are known for their durability and reliability under constant load.
Strict 3% voltage regulation provides a more consistent power delivery to your CPU and GPU compared to standard power supplies. This stability helps protect sensitive components from voltage fluctuations and can improve overall system longevity.
SFX-L is slightly longer than a standard SFX power supply, measuring 130mm in length. While it fits in most cases designed for SFX, you should double-check your specific case clearance to ensure the extra length does not interfere with other components.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$300