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Black rectangular ATX power supply unit with fully modular cable sockets and a 135 mm fan grille

Silverstone Technology

Silverstone Technology HA1200R-PM 1200W power supply

SKU CH-KZ8M-0SARF MPN HA1200R-PM

A 1200 W ATX 3.0 compatible fully modular power supply with a 135 mm FDB fan, Cybenetics Platinum efficiency and a 12VHPWR connector for PCIe 5.0 graphics cards

  • Max wattage1200 W
  • Modular cablingFull Modular
  • Fan configuration1 × 135 mm
  • Power factor correctionActive
  • PSU length limit150 mm
  • Efficiency certificationCybenetics Platinum
  • 1200 W continuous output at 50 °C ambient
  • Cybenetics Platinum certified for >=87% &
  • ATX 3.0 compatible with 12VHPWR Gen5 connector
  • Fully modular cables keep builds tidy
  • 135 mm FDB fan runs silent with semi-fanless mode

1200 W ATX 3.0 power supply

The Silverstone HA1200R-PM is a fully modular ATX 3.0 compatible unit rated for 1200 W maximum output. It includes a 12VHPWR connector that meets the PCIe 5.0 standard for modern graphics cards. Builders assembling high-end workstations or enthusiast gaming rigs will find the full cable set and 150 mm depth a practical fit for standard cases.

Sustained 1200 W delivery at 50 °C

The unit is specified for continuous 24/7 operation at its full 1200 W rating while the internal temperature reaches 50 °C. Combined +12 V rail output matches the total 1200 W capacity, so heavy compute or rendering loads do not force derating. Active PFC maintains a power factor above .9 across the 90 to 264 Vrms input range.

Semi-fanless cooling with FDB bearing

A 135 mm fluid-dynamic-bearing fan spins only when thermal load demands it, allowing 0 dBA minimum noise during light work. Japanese electrolytic capacitors and the Cybenetics Platinum efficiency badge — 87 to 89 percent overall — keep waste heat low. MTBF is rated at 100000 hours under the stated operating envelope.

How it compares

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

Price $231.99
Pricier than about 69% of the 10,869 comparable items (median $142.99).
Max wattage 1200 W
Higher than about 90% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameSilverStone
Product typeATX 3.0 Compatible
Power
Max wattage1200 W
Modular cablingFull Modular
Power factor correctionActive
Efficiency certificationCybenetics Platinum
Size & build
Shipping weight3.72 kg
Package size337 × 229 × 121 mm
Compatibility
PSU length limit150 mm
More details
Fan configuration1 × 135 mm

Questions about this item

How loud is the 135 mm FDB fan under continuous 1200 W load?

The semi-fanless design keeps the 135 mm FDB fan completely off at low loads, so the unit can run at 0 dBA minimum. Under heavy load the fan spins up but remains rated for ultra-silent operation.

Does this PSU include the 12VHPWR cable for a PCIe 5.0 graphics card?

Yes, the fully modular set ships with a native 12+4 pin 12VHPWR cable that meets the Intel ATX 3.0 specification, so no adapter is required for Gen5 GPUs.

Will the 150 mm depth fit alongside an older ATX motherboard with a 24-pin connector?

The unit follows the standard ATX PS2 form factor and includes a 24-pin ATX cable, so it mounts in any ATX case and connects to legacy motherboards without modification.

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