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Silver rectangular SFX-L power supply unit with single 120mm fan grille

Silverstone

Silverstone SX700-LPT SFX-L 700W power supply

SKU CH-VM3Y-DY6V6 MPN SX700-LPT

SFX-L 700W unit with 80 PLUS Platinum efficiency, a 120mm semi-fanless fan, fully modular flat cables and a single 58.4A +12V rail

  • Max wattage700 W (Peak 750 W)
  • Power efficiency89% ~ 92% at 20% ~ 100% loading
  • Fan configurationSingle 120 mm silent fan
  • Power factor correctionActive PFC(PF>0.95 at full load)
  • 12V railsSingle
  • Efficiency certification80 PLUS PLATINUM Certified
  • SFX-L form factor fits compact cases
  • 80 PLUS Platinum certification delivers 89% ~ 92% efficiency
  • Single +12V rail provides 58.4A for stable GPU power
  • 120mm semi-fanless fan runs silent at low load
  • 100,000-hour MTBF with Japanese capacitors ensures long life

SFX-L 700W power supply

The Silverstone SX700-LPT is an SFX-L form factor power supply delivering 700W continuous power with a peak rating of 750W. It uses a single +12V rail rated at 58.4A and holds 80 PLUS Platinum certification for 89% to 92% efficiency across 20% to 100% load. A 120mm fan with semi-fanless operation provides cooling.

Small form factor builds needing high output

This unit suits builders assembling compact systems that accept the longer SFX-L depth while demanding 700W continuous power and Platinum efficiency. The fully modular flat cable set eases routing in tight spaces. Builds restricted to standard SFX dimensions or lower wattage requirements should consider other models.

Single +12V rail at 58.4A

The class-leading single +12V rail delivers 58.4A, determining whether the PSU can sustain high-current components under full load. Active PFC with a power factor above .95 at full load ensures clean power draw from 90 to 264V input. Protection circuits include over-voltage, under-voltage and short-circuit safeguards.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $128.99
Cheaper than about 55% of the 10,869 comparable items (median $142.99).
Max wattage 700 W (Peak 750 W)
Lower than about 65% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameSilverStone
Model nameSX700-LPT
Product typeSFX-L
Ports & slots
Output type+3.3 V@22A, +5 V@22A
Connection types1 × 24 / 20-Pin motherboard connector(300 mm)
1 × 8 / 4-Pin EPS / ATX 12 V connector(400 mm)
2 × 8 / 6-Pin PCIE connector(400 mm / 150 mm)
2 × 8 / 6-Pin PCIE connector(550 mm / 150 mm)
6 x SATA connector("300 mm / 200 mm / 100 mm" x 2)
3 x SATA connector(600 mm / 150 mm / 150 mm)
3 × 4-Pin Peripheral connector(300 mm / 200 mm / 200 mm)
1 × 4-Pin Floppy adapter connector(100 mm)
Power
Max wattage700 W (Peak 750 W)
Power efficiency89% ~ 92% at 20% ~ 100% loading
Power factor correctionActive PFC(PF>0.95 at full load)
12V railsSingle
Efficiency certification80 PLUS PLATINUM Certified
Supply voltage90–264 V
AC input frequency47–63 Hz
Overvoltage protectionYes
Under voltage protectionYes
Over current protectionYes
Over power protectionYes
Size & build
Product dimensions2.5 in × 4.92 in × 5.12 in
Product weight3.7 lb (1.68 kg)
Shipping weight2.27 kg
Package size305 × 191 × 109 mm
Environment & compliance
Over temperature protectionYes
More details
Fan configurationSingle 120 mm silent fan
Mean time between failures100,000 h
Short circuit protectionYes

Questions about this item

Will the 120mm fan need replacement after long 24/7 use?

The fan is rated within a 100000 hour MTBF, so under continuous operation it should run for many years before any bearing wear appears.

What limit appears first when the 58.4A single +12V rail runs at full load for hours?

The 700W continuous rating is the ceiling; once the combined +12V draw reaches 700W the protection circuits will activate before the rail itself overheats.

How loud and hot does the 120mm fan get during all-day 700W loads?

The semi-fanless design keeps the fan off at low loads, and at full load the Platinum efficiency of 89 to 92 percent limits waste heat, so noise stays low even after hours of sustained output.

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