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Silver rectangular ATX power supply with 139mm fan grille and modular cable sockets

Silverstone

Silverstone SST-ST1200-PT 1200 W power supply

SKU CH-TRNN-Z4TAA MPN SST-ST1200-PT

Delivers 1200 W through a single +12 V rail with 80 PLUS Platinum efficiency and a 139 mm semi-fanless cooler

  • TypeATX12V / EPS12V
  • Maximum Power1200 W
  • FansSingle 139mm silent fan
  • PFCActive
  • Main Connector20+4Pin
  • +12V RailsSingle
  • 80 PLUS Platinum certification cuts energy waste with 89-92% efficiency
  • Single 139mm Air Penetrator fan runs semi-fanless for quiet operation
  • Single +12V rail delivers 100A for stable multi-GPU power
  • 16 SATA connectors plus 8 PCIe plugs support dense storage and graphics
  • 180mm depth fits standard ATX cases while supplying 1200W continuous output

1200 W Platinum power supply

The Silverstone Strider Platinum SST-ST1200-PT delivers 1200 W of continuous power for high-end desktop systems. It meets 80 PLUS Platinum efficiency with a single +12 V rail rated at 100 A. The unit accepts 105 to 264 V input at 47 to 63 Hz. A 139 mm Air Penetrator fan handles cooling.

Thermals, noise and power draw

The 139 mm fan runs semi-fanless at low load and stays within a 40 degree C operating temperature. Efficiency ranges from 89 to 92 percent across typical loads. Active PFC and over-voltage protection keep output stable. MTBF exceeds 100000 hours.

Build fit and modularity

Fully modular cables include 24, 20, 16, 12, 8 and 6 pin connectors for motherboard, CPU, PCIe and SATA devices. An FF141 magnetized fan filter is supplied. The chassis measures 180 mm deep. Strict voltage regulation stays within +/- 3 percent.

Highlights

  • 80 PLUS Platinum certification cuts energy waste with 89-92% efficiency
  • Single 139mm Air Penetrator fan runs semi-fanless for quiet operation
  • Single +12V rail delivers 100A for stable multi-GPU power
  • 16 SATA connectors plus 8 PCIe plugs support dense storage and graphics
  • 180mm depth fits standard ATX cases while supplying 1200W continuous output

Specifications

BrandSilverStone
SeriesStrider Platinum series
ModelSST-ST1200-PT
TypeATX12V / EPS12V
Maximum Power1200 W
FansSingle 139mm silent fan
PFCActive
Main Connector20+4Pin
+12V RailsSingle
PCI-Express Connector8 x 6+2-Pin
SATA Power Connector16
Max PSU Length180 mm
Efficiency89% - 92%
Energy-Efficient80 PLUS PLATINUM Certified
Over Voltage ProtectionYes
Input Voltage105 - 264 V
Input Frequency Range47 - 63 Hz
Output+3.3V@22A, +5V@25A, +12V@100A, [email protected] , - [email protected]
MTBF>100,000 Hours
Connectors1 x 24 / 20-Pin motherboard connector
1 x 8 / 4-Pin EPS / ATX 12V connector
1 x 8 / 4-Pin EPS / ATX 12V connector
8 x 8 / 6-Pin PCIE connector
16 x SATA connector
6 x 4-Pin Peripheral connector
2 x 4-Pin Floppy connector
FeaturesHigh efficiency with 80 PLUS Platinum certification
139mm Air Penetrator fan with intelligent semi-fanless operation
FF141 magnetized fan filter included
100% modular cables
24/7 continuous power output with 40 degree C operating temperature
Strict +/- 3% voltage regulation and low ripple & noise
Dual EPS 8pin with multiple individual one-on-one PCI-E 8/6pin connectors
Over Current Protection, Over Power Protection, Over Voltage Protection, Short Circuit Protection, Under Voltage Protection, Over Temperature Protection
Dimensions3.39" x 5.91" x 7.09"
Weight7.28 lbs.
Shipping weight4.50 kg
Package size366 × 236 × 130 mm

Questions about this item

How do I install the Silverstone SST-ST1200-PT and which step is commonly missed?

Mount the 180 mm long unit with four screws, connect the 24-pin motherboard cable, both 8-pin EPS cables, required PCIe 6+2-pin cables, and SATA cables; the step often missed is plugging in both 8-pin EPS connectors for CPU power.

What maintenance or replacement will the Silverstone SST-ST1200-PT need later?

The 139 mm fan is the only moving part; clean dust from the included magnetised filter periodically, and if bearing noise appears after many years the fan can be replaced with a standard 139 mm unit.

What limit appears first on the Silverstone SST-ST1200-PT under sustained full load?

The single +12 V rail is rated at 100 A; once the combined GPU and CPU draw reaches that 100 A ceiling the over-current protection will trip, capping continuous output at 1200 W.

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