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Compact SFX power supply unit in matte black finish with modular cable ports and cooling fan visible

Silverstone Technology

Silverstone Technology Extreme 850R Platinum 850W SFX Power Supply

SKU CH-7K98-MP5WF

An 850W SFX power supply with Cybenetics Platinum efficiency, a 12VHPWR connector rated for 450W, and continuous output at 50°C

  • Chassis styleDesktop
  • SFX 12V V4.0 standard supports PCIe 5.0 graphics cards out-of-the-box
  • Cybenetics Platinum certification delivers 24/7 continuous power at 50 °C operating temperature
  • 92 mm FDB fan with intelligent control and delayed shut-off runs ultra-quiet
  • All Japanese electrolytic capacitors and flat modular cables ensure reliable clean power
  • ATX-to-SFX adapter bracket included for flexible small-form-factor builds

SFX 12V V4.0 power supply

The Silverstone Extreme 850R Platinum delivers 850W in the SFX form factor, built to the SFX 12V V4.0 specification that matches ATX 3.0 requirements. It includes a 12VHPWR connector rated for 450W, making it ready for PCIe 5.0 graphics cards. The unit suits small form factor builders who need high output without a full ATX footprint.

Cybenetics Platinum thermals

Cybenetics Platinum certification confirms high efficiency across the load range, and the supply is rated for continuous 24/7 operation at up to 50 operating temperature. A 92mm fluid dynamic bearing fan runs under intelligent speed control and adds a delayed shut-off function to clear residual heat after the system powers down.

Modular cables and ATX bracket

All Japanese electrolytic capacitors are paired with flexible flat modular cables that simplify routing in tight chassis. An ATX to SFX adapter bracket is included so the unit can fit standard ATX mounting points. Only the supplied cables should be used to maintain reliability and performance.

How it compares

Measured against everything we stock in Rackmount Server Cases, at today’s prices. Recalculated every night.

Price $325.99
Pricier than about 70% of the 1,006 comparable items (median $222.49).

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Specifications

Size & build
Chassis styleDesktop

Questions about this item

How do I install the SFX power supply in a standard ATX case, and what step is often missed?

Mount the unit using the included ATX-to-SFX adapter bracket, then connect only the modular cables supplied with the power supply.

What maintenance will this SFX power supply need over its lifetime?

The 92mm FDB fan runs with intelligent control and a delayed shut-off function; no user lubrication or replacement schedule is required.

What limit appears first when the unit runs at full load for long periods?

Cybenetics Platinum certification guarantees 850W continuous output at 50°C operating temperature.

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