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Silverstone SFX-L power supply, matte black rectangular unit with 120mm fan grille and modular cable ports

Silverstone

Silverstone SX500-LG 500 W SFX-L power supply

SKU CH-6BJ6-QAWQB MPN SX500-LG

A 500 W SFX-L power supply with a 120 mm fan rated at 18 dBA, full modular cables and 80 PLUS Gold efficiency

  • Max wattage500 W
  • Power efficiency87%~90%(20% to 100% loading)
  • Modular cablingFull Modular
  • Fan configurationSilent running 120 mm fan with 18 dBA minimum (SX500-LG V2.0
  • Power factor correctionActive
  • Main power connector20+4Pin
  • Quiet operation with a 120 mm fan at 18 dBA minimum
  • Compact SFX-L design adds 30 mm depth for better cooling
  • Full modular cabling keeps the build tidy and airflow clear
  • 80 PLUS Gold certified efficiency from 87 % to 90 % load
  • Single +12 V rail delivers 40 A for stable power

SFX-L 500 W power supply

The Silverstone SX500-LG is a fully modular SFX-L unit rated at 500 W. It targets small-form-factor builders who need more cooling headroom than a standard SFX design allows. The 120 mm fan runs at a minimum of 18 dBA for quiet operation. 80 PLUS Gold certification confirms 87 to 90 percent efficiency across typical loads.

Single +12 V rail at 40 A

All 500 W are delivered on a single +12 V rail rated at 40 A. This layout simplifies power distribution for modern graphics cards and CPUs. Two 6+2-pin PCIe connectors are provided for GPU power. The 20+4-pin ATX and 8/4-pin EPS cables support current motherboards.

Full modular cables ease routing

Every cable detaches so only required leads stay in the case. Lengths include a 300 mm ATX connector, a 400 mm EPS connector, and PCIe cables at 400 mm and 150 mm. Three SATA connectors span 300 mm, 200 mm and 100 mm. Verify case clearance for the 30 mm longer SFX-L body before ordering.

How it compares

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

Price $94.99
Cheaper than about 70% of the 10,869 comparable items (median $142.99).
Max wattage 500 W
Lower than about 84% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameSilverStone
Model nameSX500-LG
Product typeSFX-L
Ports & slots
PCIe power connectors2 × 6+2-Pin
SATA power connectors3
Output type+3.3 V@20A, +5 V@20A, +12 V@40A
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)
3 x SATA connector(300 mm / 200 mm / 100 mm)
2 × 4-Pin Peripheral connector (300 mm / 200 mm)
1 × 4-Pin Floppy connector(300 mm / 200 mm / 200 mm)
Power
Max wattage500 W
Power efficiency87%~90%(20% to 100% loading)
Modular cablingFull Modular
Power factor correctionActive
Main power connector20+4Pin
12V railsSingle
Efficiency certification80 PLUS GOLD Certified
Overvoltage protectionYes
Overload protectionYes
Supply voltage90–264 V
AC input frequency47–63 Hz
Size & build
Product dimensions2.5 in × 4.92 in × 5.12 in
Product weight3.09 lb (1.4 kg)
Shipping weight1.86 kg
Package size221 × 206 × 81 mm
More details
Fan configurationSilent running 120 mm fan with 18 dBA minimum (SX500-LG V2.0)
Mean time between failures>100,000 h

Questions about this item

Will the SFX-L form factor fit my case that only accepts standard SFX units?

The SFX-L design adds 30mm of depth over standard SFX, so verify your case clearance before purchase.

What GPU power connectors are included for a mid-range graphics card?

Two 6+2-pin PCIe cables are supplied, supporting most cards up to the unit's 500 W limit.

How loud is the 120 mm fan under light loads?

The V2.0 fan spins down to a minimum of 18 dBA for quiet operation at low power draw.

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