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Silent Pro hybrid 850W is part of Cooler Master’s first fully modular power supply series with integrated dual 7V fan ports. It utilizes a single powerful +12V rail that operates at over 90% efficiency and carries an 80Plus Gold certification.

A fan speed controller is included in the package. It occupies a 5.25” drive bay and enables a user to control the Silent Pro Hybrid 135mm Silent Hydraulic Bearing fan along with up to three system fans.


  • Fully Modular Cables
    Flexibility of using only the cables needed for a cleaner system build

  • Silent Operation
    135 mm Hydraulic Dynamic Bearing Fan for quieter operation

  • Function Panel Fan Speed Control
    5.25”control panel for 135mm PSU and three system fans

  • Switchable Automatic / Manual mode
    - Fanless Mode:

    Fanless operation with 135mm fan is at 0dB when loading is under 200W
    - Manual Mode:
    PSU fan speed can be adjusted manually from 3V-12V

  • Single 12 V Power Rail Tackling challenges from the most power-intensive peripherals head on, this solitary 12 V power rail provides ample power and strong resistance to any overloading up to 105A.

  • Double-Layer EMI Filter Dual protection from electromagnetic interference, thus restraining noise and interference for greater protection for you and your connections.

  • Unique Patented Technologies:
    Hybrid Transformer™:
    Specially design transformer to improve thermal and efficiency.
    Patent design transformer mount with heat sink, the size was reduced by up to 25% than the traditional transformer providing lesser energy consumption, while conducting the heat for better overall efficiency.

    HTT™ - Heat Transfer Technology:
    Patent design “L” shaped heat sink layout.
    This technology helps to guide the air flow along the heat sink to improve the air circulation for maximum performance.

    Hyper Path™:
    Patent design hyper link between IC and the relative components.
    Patent energy conversion design path provides super efficient connection from the transformer to components. The signal can be transfer directly without any energy loss.

  • Intel Compliant ATX12V v 2.3 and EPS version 2.92 compliant.

  • Active PFC+ PWM Combo Controller Integrating this active controller will increase the efficiency of any computer, making PFC higher than 99%.

  • Japanese Capacitors
    High quality capacitors protecting equipment from capacitor leakage problem, also increasing the life-span of your equipment, especially at high temperatures.

  • Eco-friendly design: Erp Lot6 Ready!
    A maximum 5Vsb current draw target in S5 off-mode of 0.1A for its motherboards and needed to ensure the system will consume < 1W in its off-mode

  • Supports 4-Way SLI / CrossFire + Dual CPUs.
    Able to run toughest rig with 4-way GPUs and dual CPUs without any hassle.

    And More
    Multiple updated connectors for all types of interfaces (PCIe, SATA etc.)
    Multiple Protection Design (OVP / UVP / OCP / OPP / OTP / SCP)
    High reliability with an MBTF of at least 100,000 hours of use.
    Five Year Warranty.



  •  Specifications
    Model RS-850-SPHA-D3; RS850-SPHAD3-US
    Type Intel ATX 12V V2.3 & SSI EPS 12V V2.92
    Dimension 150 x 180 x 86 mm
    5.9 x 7 x 3.4 inch
    Input Voltage 90-264V (Auto Range)
    Input Current 9-4.5A
    Input Frequency Range 47Hz-63Hz
    PFC Active PFC (>0.9)
    Power Good Signal 100-500ms
    Hold Up Time 17ms
    Efficiency 90% Typically
    MTBF 100,000 Hours
    Protection OVP / UVP / OCP / OPP / OTP / SCP
    Output Capacity 850W
    Operation Temperature 0~40°C (Nominal Input Voltage)
    Regulatory TUV / GOST / CE / C-Tick / UL / BSMI / CCC / FCC / KCC
    Fan 135mm (Silent Hydraulic Bearings)
    Certification 80 Plus Gold
    Connector M / B 24 pins x 1
    CPU 4 + 4 pins x 2
    PCI-e 6+2 pins x 6
    SATA x 12
    Peripheral 4 pins x 5
    Floppy 4 pins x 1
    Fan cable 3 pins x 3
    Warranty 5 years
    UPC Code 884102012044
    Disclaimer: Images are for informative purposes only; displayed parts and accessories may not be included in the actual product package.

    Click a thumbnail below to view a larger image. : October 2011

    "Cooler Master's Silent Pro Hybrid Fanless series is actually pretty alluring. The supply isn't actually "fanless" but it does have a fanless mode that can be used to minimize machine noise, at least until the load crosses the 200W threshold. Add to that a 90-percent efficiency, fully modular cables and a control panel that lets you manually adjust the speed of your system fans and you're looking at quite the compelling product for the DIY desktop enthusiast."

    » Details


    Name Type Release Date Description
    Silent Pro Hybrid Manual 2011.10.04 Manual for Silent Pro Hybrid power supply series
    Silent Pro Hybrid 850W Product Sheet 2011.10.04 Product sheet for Silent Pro Hybrid 850W power supply


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