Super Flower Leadex III 1300W ATX v3.1 PSU Review

The Super Flower Leadex III 1300W is a strong ATX v3.1 compliant PSU, capable of supporting the current and next generation GPUs. With the NVIDIA RTX 5000 and the new AMD RX 8000 around the corner, it is time to think about your power needs! 

The Super Flower Leadex III 1300W is (or will be) included in my best ATX v3.x & PCIe 5.x PSU picks article.

Super Flower continues to have a strong presence in the PSU market, mainly selling under its name and not as an OEM (aka making products for other brands). In today’s review, I will look at the Leadex III 1300W, which offers a high watt-per-dollar ratio thanks to its increased max power and the very good price, which at the time of the review was set at $160. With this amount, you get a Cybenetics Platinum certified PSU, able to handle up to 2600W power spikes. Hence, you won’t face any issues even if you pair it with an NVIDIA RTX 5090 (once it becomes available and, of course, given that you have the money to buy it).

High-capacity ATX v3.1 PSU Reviews:

Technical Specifications:
  • Manufacturer (OEM): Super Flower
  • Max Power: 1300W
  • Cybenetics Efficiency: [115V] Cybenetics Platinum (89-91%), [230V] Cybenetics Gold (89-91%)
  • Noise: Cybenetics Standard++ (30-35 dB[A])
  • Compliance: ATX v3.1, EPS 2.92
  • Operating Temperature (Continuous Full Load): 0 – 50 °C
  • Alternative Low Power Mode support: Yes
  • Power 12V combined: 1299.6W
  • Number of 12V rails: 1
  • Power 5V + 3.3v: 100W
  • Power 5VSB: 15W
  • Cooling: 140mm Fluid Dynamic Bearing Fan (ZFF142512D)
  • Semi-Passive Operation: ✓ (Selectable)
  • Modular Design: Yes (Fully)
  • High Power Connectors: 2x EPS (2x cables), 4x PCIe 6+2 pin (4x cables), 1x PCIe 12+4 pin (600W)
  • Peripheral Connectors: 8x SATA (2x cables), 4x 4-pin Molex (1x cable)
  • ATX Cable Length: 595mm
  • EPS Cable Length: 700mm
  • 12+4 pin PCIe Cable Length: 700mm
  • 6+2 pin PCIe Cable Length: 700mm
  • Distance between SATA / 4-pin Molex: 130/150mm
  • In-cable capacitors: No
  • Dimensions (W x H x D): 150 mm x 85 mm x 150mm
  • Weight: 1.55 kg (3.42 lb)
  • Warranty: 10-years
  • Street Price (excluding VAT): $160 (at the time of the review)

Power Specifications

Rail 3.3V 5V 12V 5VSB -12V
Max. Power Amps 20 20 100 3 0.5
Watts 100 1299.6 15 6
Total Max. Power (W) 1300
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11 thoughts on “Super Flower Leadex III 1300W ATX v3.1 PSU Review

  1. Should I buy Super Flower Leadex III 1300W ATX v3.1 or Cooler Master MWE gold v2 1250w to be on safe site about 2vsb rail?

      1. thank you for replying! what about NZXT c1000 atx3.1 or Corsair RM1000e? NZXT c1000 atx3.1 is just few dollars more at my country

    1. I got this PSU but I think mine is dead. Tried doing a BIOS flashback with just the motherboard and cpu power plugged in and nothing happened (yes the psu was switched on). I then did the paperclip test and the fan didnt spin but im not sure if it normally spins at startup. Does anyone know? I tried both with ECO on and ECO off.

  2. Thanks for your review. Any thoughts on what you’d pick between the 1000W version of this and the new (ATX 3.1) RM1000x that you reviewed in September?

    1. I am also looking at the Leadex VII XP Platinum that you recommend in your guide. But I think this review is the first time anyone has looked at one of the new ATX 3.1 Leadex III models.

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