Super Flower Leadex III 1300W ATX 3.1 power supply: specs explained

The Super Flower Leadex III (model SF-1300F14GE) is a 1300W fully modular power supply for desktop PCs. It follows Intel's ATX 3.1 standard and includes a 16-pin PCIe Gen 5 cable (12V-2x6), so it is designed for high-end gaming and workstation builds with power-hungry graphics cards.

ATX 3.1 and the 12V-2x6 cable

ATX 3.1 is the current revision of Intel's power supply specification. Super Flower says this model supports up to 200% power excursion, meaning it can handle the brief spikes that modern graphics cards produce for fractions of a second. The 12V-2x6 connector is the 16-pin plug used by recent high-end graphics cards. The listing says the cable uses HCS terminals and dual 8-pin sockets on the modular panel, and that the GPU-side design is intended to avoid problems from sharp bending near the plug. Even so, it is sensible to leave some straight cable length from the plug before any bend.

What the efficiency certifications mean

Efficiency describes how much wall power becomes usable power instead of waste heat.

• 80 PLUS Gold: Super Flower lists 87% at 20% load, 90% at 50% and 87% at 100% load.
• Cybenetics Platinum: 89% to under 91% overall efficiency on 115V input, and 91% to under 93% on 230V.

The two programs measure slightly differently, which is why a unit can carry a Gold and a Platinum label at once. Higher efficiency typically means less heat and noise for the same output.

Voltage regulation and protection

The listing gives voltage regulation within plus or minus 1% on the 12V, 5V and 3.3V rails, with low ripple on the 12V output. It also lists these protections: over voltage, over current, over power, short circuit, under voltage and over temperature, along with no-load operation and surge and inrush protection. The input is 100V to 240V with active PFC, and the unit meets IEC/EN 62368, Energy Star and RoHS requirements as listed. Follow the manual when installing and connecting.

Fan and cooling

The 140mm fan uses a fluid dynamic bearing (FDB) with a copper shaft, and a seven-blade design aimed at high airflow with low noise. Super Flower says the copper shaft improves stability, heat dissipation and lifespan. An ECO semi-fanless mode lets the fan stay off at low loads, so the PC can be near silent when idle or lightly used.

Modular cables

The unit is 100% modular with flat ribbon cables, so you connect only what you need. This makes tidy cable routing easier in compact cases. A patented buckle (20+4) pin connector and PCI-E (6+2) pin connectors for graphics cards are listed. The supply measures about 5.9 x 5.9 x 3.4 inches (15 x 15 x 8.6 cm) and weighs 4.3 lb (about 1.95 kg). Super Flower lists a ten-year warranty.

Who it suits

It suits large builds with a high-end graphics card, multiple drives or overclocked parts, and people who want headroom. For modest systems, a lower-wattage supply is generally enough, and running well under capacity is normal for a unit like this.

What to check before you buy

• Total power needs: add up your CPU and GPU requirements, and check the graphics card maker's recommended wattage.
• Connectors: confirm your GPU uses 12V-2x6 or 8-pin power, and that the cables included reach.
• Case fit: check that the case supports a standard ATX supply of this depth.
• Mains supply: a 1300W load needs a suitable outlet and circuit.
• Cable compatibility: use only the cables made for this unit, never ones from another brand.
• What's in the box: check which cables are included against your parts list.

The short version

• A 1300W, fully modular ATX 3.1 power supply with a 12V-2x6 PCIe Gen 5 cable.
• 80 PLUS Gold and Cybenetics Platinum efficiency certifications.
• Voltage regulation within 1% and a full set of protections.
• 140mm FDB fan with a semi-fanless ECO mode.
• 10-year warranty listed, about 5.9 x 5.9 x 3.4 inches and 4.3 lb.

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