Super Flower Leadex Platinum 550W Power Supply Review

by - 5 years ago


Final Thoughts


The Super Flower Leadex Platinum 550W Fully Modular 80 Plus Platinum Power Supply can be picked up from most major retailers, and is currently available from Overclockers UK for a very reasonable £74.99. While that may seem a lot for a PSU of this power output, it’s an absolute bargain for a Platinum unit, with many manufacturers making 80 Plus Gold rated units for the same price!


Super Flower makes some of the best power supplies in the world and their Leadex Platinum 550W is a prime example of just how great they can be. To have the high-end performance of a much more expensive unit at a wattage and price range that would suit virtually any single GPU system configuration, with headroom for dual graphics cards on more modern and efficient GPUs is simply fantastic.

The performance figures of this unit just keep on getting better and better. Reliable voltage regulation, exceptionally low ripple (some of the lowest we’ve ever seen!), fantastic cool with virtually no noise and a hybrid/passive cooling mode that’s even quieter, great efficiency that will save you money in the long run, and finally, let’s not forget that it was able to exceed 800W power draw!

Picking the right PSU for your system can be tricky, knowing which wattage or efficiency to get for your budget, but with this unit, it’s a no-brainer. The price is good, the performance is fantastic, the overall design, build quality and aesthetics are all premium grade. With the added bonus of those gorgeous cables, as well as their LED block fittings, Super Flowers widely trusted hardware testing and competitive 5-year warranty the Leadex Platinum 550W ticks every box for what we look for in a great PSU.


  • Competitive price
  • Superb build quality
  • Great aesthetics
  • Platinum efficiency
  • Virtual silent operation
  • Impressive OPP
  • Extremely low ripple
  • 5-year warranty


  • None
Super Flower Leadex Platinum 550W Modular Power Supply Review

Super Flower Leadex Platinum 550W Modular Power Supply Review

Thank you OCUK for providing this review sample.

Article Index

  1. Introduction and Packaging
  2. A Closer Look - Exterior
  3. A Closer Look - Interior
  4. Test Procedure
  5. Efficiency, PFC and Voltage Regulation
  6. Ripple Testing
  7. OPP and Max Wattage
  8. Fan Speed
  9. Final Thoughts
  10. View All

Author Bio

2 Comments on Super Flower Leadex Platinum 550W Power Supply Review

  • Avatar tomekkk1 says:

    Couple of confirmations of things we can read in this test, plus one small issue found:
    • Bulletproof build without the doubt – every detail of PSU case has been made neatly, using proper solid materials.
    • Full set of aesthetic cables, easy to manage them as I wish, long enough
    for most of cases – connectors are pretty solid on both sides.Full set of aesthetic cables, easy to manage them as I wish, long enough
    for most of cases – connectors are pretty solid on both sides. Cables finishings are in finest quality, once connected they stays secure & tight in the sockets. Bag for unnecessary cables is an nice add-on too;
    • Stability – the voltages are really like frozen: idle, moderate load under full load, or quick changing load – doesn’t matter, still great stability;
    • Stone cold – now will be something quite interesting: I’ve got this unit in NZXT Noctis 450 PC Case, inside of integrated shroud. The fan is set in “ECO” (hybrid semi-passive mode), fan hole is located on top (I didn’t fit it up side down by purpose), where is only 2-3mm distance to the top of the shroud. Could say the heat must be generated inside, resulting that fan will by running very often. Nothing like that… To be honest it didn’t run even once yet. It is stone cold. The lowest case fan (with very reduced speed), located at the front of PC case surely makes the air moving towards PSU a bit – and this is the only ventilation there. Really the fan in this Power Supply is just like additional bonus – been given, but we never needed to use;
    • The only small issue is SATA supply cable. As most of the PC cases are
    now designed with PSU located at bottom I found this cable is designed
    other way round – like for PSU’s located at top of the case. That means
    if you connecting two or more drives (I have three HDD’s currently)
    firstly the lowest Drive needs to be connected using farthest plug we have on the lead, than next one above etc.
    After connect the last top one, rest of the cable needs to go back down to PSU –
    makes this area unnecessary busier than we need, which tat is only thing to consider if we have smaller / very low budget PC case.

    Generally – it is really silly to compromise own choice buying cheapest PSU. And now it is a lot easier to make right decision – we can reach for not very expensive Hi-End Power Supply in the price of Mid-Class. Cannot choose better…

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