SilverStone 700W SFX-L Power Supply - Quiet, High Efficiency

In this review the SilverStone 700W SFX-L power supply is assessed for small form factor builders who need a reliable, quiet unit that can run 24/7. The main reason to choose this model is its combination of a full 700W continuous output with an 80 Plus Platinum rating and a silent 120mm fan, which together deliver sustained power and noticeably lower noise than standard SFX units. The reviewer found it especially compelling for HTPCs and compact workstations where noise and continuous operation matter most.

Key Features

• 700W continuous output: Provides stable power for compact systems and is rated for 24/7 operation so it suits always-on media centers and home servers.
• 80 Plus Platinum efficiency: High efficiency reduces wasted heat and lowers power draw under typical loads, which helps quiet cooling and long-term operating cost.
• SFX-L form factor with 120mm fan: The added depth allows a quiet 120mm fan that keeps noise down at higher loads compared with standard SFX designs.
• Fully modular cables: Short, flexible flat array cables reduce clutter in tight cases and let builders install only the connectors they need.
• Quad PCI-E support: Multiple 8/6pin PCI-E connectors enable compact builds with one or more discrete graphics cards where space permits.

Who It's For

The best audience for this power supply is small form factor enthusiasts building HTPCs, compact workstations, or quiet media servers who need continuous 700W capacity and a low-noise operation. Its semi-fanless behavior and Platinum efficiency make it attractive where both heat and electricity cost matter.

Those building full-tower gaming rigs with very high peak loads or who require unusually long cable runs should look elsewhere; this SFX-L design favors compact layouts and uses short modular cables that may not suit large cases or extreme cable routing needs.

Pros & Cons

Pros

• Quiet operation thanks to the larger 120mm fan and semi-fanless design, making it ideal for noise-conscious setups.
• High continuous 700W output with 80 Plus Platinum efficiency gives reliable, low-heat performance for 24/7 use.
• Fully modular short, flat cables simplify builds in tight cases and improve airflow compared with fixed wiring.
• Includes support for multiple PCI-E 8/6pin connectors to power discrete graphics in compact builds.

Cons

• Cable durability has mixed reports; while braided, some users experienced early failures so careful handling during installation is advised.
• Short modular cables may not reach in larger ATX cases without an adapter or extension, limiting use outside SFX-L or HTPC layouts.

Specifications

Form factor	SFX-L (lengthened SFX)
Continuous power	700W (24/7 rated)
Efficiency	80 Plus Platinum
Cooling	120mm silent fan with semi-fanless operation
Input voltage	90V ~ 264V
Operating temperature	0 ~ 40 degree Celsius
Cabling	Fully modular short flat cables; supports quad PCI-E 8/6pin

Our Verdict

The SilverStone 700W SFX-L is a strong choice for compact builds that need continuous, efficient power with minimal noise. It offers excellent value for HTPCs and small workstations thanks to its Platinum efficiency and 120mm fan, but buyers should be aware of mixed reports on cable longevity and short cable lengths for larger cases.

Frequently Asked Questions

Can this power supply run 24/7?
Yes, it is rated for 700W continuous operation and specified for 24/7 use within the 0 to 40 degree Celsius operating range.

Will the modular cables fit a full-size ATX case?
The unit uses short flat modular cables intended for compact layouts; an adapter or extensions may be required for deep ATX cases.

Is the fan loud at high load?
The larger 120mm fan and semi-fanless design keep noise low compared with standard SFX units, though fan speed will increase under sustained heavy loads.