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Black rectangular ATX power supply with 120mm fan grille and modular cable ports

Super Flower

Super Flower Leadex VIII Platinum PRO 1200W power supply

SKU CH-Y1NC-8637E

A 1200W ATX 3.1 power supply measuring 125mm long with Cybenetics Platinum efficiency and a native 12V-2x6 cable for PCIe 5.1 graphics cards

  • Max wattage1200 W
  • Modular cablingFull Modular
  • Fan configuration1 × 120 mm
  • Power factor correctionActive
  • Main power connector20+4Pin
  • 12V railsSingle

Model ATX 3.1 Platinum 1200W Black

  • Compact 125 mm length fits tight builds
  • ATX 3.1 and PCIe 5.1 native 12V-2x6 cable support
  • Full modular ribbon cables simplify routing
  • Cybenetics Platinum certification confirms high efficiency
  • 120 mm fluid dynamic bearing fan runs quietly

Compact 1200 W ATX 3.1 unit

The Super Flower Leadex VIII Platinum PRO delivers 1200 W in a 125 mm deep ATX chassis. It targets builders who need maximum output for multi-GPU or workstation rigs but have limited case clearance. Full modular cabling and a native 12V-2x6 connector simplify cable routing in tight spaces.

Sustained-load behaviour

Cybenetics Platinum certification confirms high efficiency across the load curve, not just at peak. A single +12 V rail and active PFC keep voltage stable during prolonged render or compute sessions. The 120 mm fluid-dynamic-bearing fan maintains airflow while noise stays low under continuous thermal stress.

Upgrade context

This unit replaces longer 1200 W models that exceed 125 mm depth, freeing room for radiators or drive cages. The jump is worthwhile when an existing PSU lacks ATX 3.1 compliance or a native 12V-2x6 cable for modern GPUs. Builders staying with older platforms or lower-wattage needs gain no benefit.

How it compares

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

Price $125.99
Cheaper than about 57% 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 nameSuper Flower
Product colorBlack
Product typeATX3.1/ ATX3.0 Compatible
Graphics
SLI supportReady
Power
Max wattage1200 W
Modular cablingFull Modular
Power factor correctionActive
Main power connector20+4Pin
12V railsSingle
Efficiency certificationCybenetics Platinum
Supply voltage100–240 V
AC input frequency50/60 Hz
Overvoltage protectionYes
Under voltage protectionYes
Over current protectionYes
Over power protectionYes
Size & build
Top fans size120 mm
Compatibility
Haswell compatibilityReady
PSU length limit125 mm
Environment & compliance
Over temperature protectionYes
More details
Fan configuration1 × 120 mm
Over load protectionYes
Short circuit protectionYes

Other versions of this model

4 more in the same range

Questions about this item

How loud and hot does the 120 mm fluid-dynamic-bearing fan run when the 1200 W unit delivers full load all day?

The 120 mm ultra-silent fluid-dynamic-bearing fan is designed for low-noise operation; Cybenetics Platinum efficiency reduces waste heat, so the fan stays quieter and cooler even under sustained 1200 W output.

Which cables must I already have to use the native 12V-2x6 connector on this ATX 3.1 supply?

The supply ships with a native 12V-2x6 cable included in the full-modular ribbon-cable set, so no separate GPU power cable purchase is required.

Will the 125 mm length and ATX 3.0 compatibility let me keep my older 20+4-pin motherboard and still meet PCIe 5.1 power demands?

Yes, the 125 mm chassis fits standard ATX cases, the 20+4-pin main connector works with legacy boards, and the single +12 V rail supports both ATX 3.0 and PCIe 5.1 devices simultaneously.

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