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Silverstone

Silverstone SST-ST1200-PTS 1200 W power supply

SKU CH-SGVZ-05JAR MPN SST-ST1200-PTS

A 1200 W ATX power supply with 80 PLUS Platinum efficiency, full modular cables and a single +12 V rail rated at 100 A

  • TypeATX12V v2.4
  • Maximum Power1200 W
  • FansSingle 120mm HYB fan
  • PFCActive
  • Main Connector20+4Pin
  • +12V RailsSingle
  • 1200 W output powers demanding builds with a single +12V rail rated at 100 A
  • 80 PLUS Platinum certification delivers 89 % to 92 % efficiency from 20 % to 100 % load
  • Full modular design with flat 24-pin cables enables clean routing and reduced clutter
  • 120 mm HYB fan plus magnetic dust filter provides quiet cooling while limiting dust ingress
  • Compact 140 mm depth fits high-wattage needs into smaller chassis

Power for demanding systems

The Silverstone SST-ST1200-PTS is a 1200 W ATX12V v2.4 power supply built for high-output PCs. It carries 80 PLUS PLATINUM certification and delivers 89% to 92% efficiency across 20% to 100% loading. A single +12V rail rated at 100A supports heavy GPU and CPU loads. Over voltage protection is included for component safety.

Build integration and cable freedom

Full modular cabling lets you attach only the leads your build requires, reducing clutter inside the chassis. The unit provides eight 6+2-pin PCI-Express connectors and eight SATA power connectors for multiple drives and graphics cards. Flat 24-pin cables improve routing in tight spaces. At 140 mm deep, the PSU fits many standard ATX cases while leaving room for cable bends behind the motherboard tray.

Who this suits and who should look elsewhere

This unit suits builders assembling multi-GPU workstations or heavily overclocked rigs that demand 1200 W of continuous platinum-rated power. The single-rail design simplifies load balancing for extreme configurations. Systems with modest components or lower wattage needs will find the capacity and cost excessive; a smaller gold or bronze unit would be more appropriate.

Highlights

  • 1200 W output powers demanding builds with a single +12V rail rated at 100 A
  • 80 PLUS Platinum certification delivers 89 % to 92 % efficiency from 20 % to 100 % load
  • Full modular design with flat 24-pin cables enables clean routing and reduced clutter
  • 120 mm HYB fan plus magnetic dust filter provides quiet cooling while limiting dust ingress
  • Compact 140 mm depth fits high-wattage needs into smaller chassis

Specifications

BrandSilverStone
SeriesStrider Platinum series
ModelSST-ST1200-PTS
TypeATX12V v2.4
Maximum Power1200 W
FansSingle 120mm HYB fan
PFCActive
Main Connector20+4Pin
+12V RailsSingle
PCI-Express Connector8 x 6+2-Pin
SATA Power Connector8
Max PSU Length140 mm
ModularFull Modular
Efficiency89% - 92% at 20% - 100% loading
Energy-Efficient80 PLUS PLATINUM Certified
Over Voltage ProtectionYes
Input Voltage115 - 240 V
Input Frequency Range50/60 Hz
Input Current12 - 6A
Output+3.3V@25A, +5V@22A, +12V@100A, +5VSB@3A, [email protected]
MTBF100,000 hours
Connectors1 x 24 / 20-Pin motherboard connector("600mm")
1 x 8 / 4-Pin EPS / ATX 12V connector("550mm")
1 x 8 / 4-Pin EPS / ATX 12V connector("750mm")
8 x 8 / 6-Pin PCIE connector("550mm/150mm" x4)
8 x SATA connector("600mm /150mm / 150mm / 150mm" x2)
6 x 4-Pin Peripheral connector("600mm / 150mm / 150mm" x2)
2 x 4-Pin Floppy connector("150mm" x2)
FeaturesCompact design with a depth of 140mm for easy integration
High efficiency with 80 PLUS Platinum certification
100% modular cables
24/7 continuous power output with 40? operating temperature
Class-leading single +12V rail
Strict +/-3% voltage regulation and low ripple & noise
Built-in silent & durable hybrid ceramic bearing (HYB) fan
FF122 magnetized fan filter included
Dimensions3.39" x 5.91" x 5.51"
Weight4.41 lbs.
Shipping weight3.63 kg
Package size381 × 254 × 127 mm

Questions about this item

At what load does the 1200 W unit reach its peak 92 % efficiency?

The Platinum rating guarantees 92 % efficiency at 100 % load, with 89 % at 20 % load and a flat curve across the 20–100 % range.

How loud is the 120 mm HYB fan when the PSU runs at full load all day?

The 120 mm HYB fan is designed for high airflow at low noise; a magnetic dust filter keeps the heatsink clean so fan speed stays steady during continuous operation.

Which power cables must my graphics cards already use to plug into the eight PCIe ports?

Each of the eight PCIe connectors is a 6+2-pin design, so cards with either 6-pin or 8-pin sockets will attach directly without adapters.

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