Cold Test Results

For the testing of PSUs, we are using high precision electronic loads with a maximum power draw of 2700 Watts, a Rigol DS5042M 40 MHz oscilloscope, an Extech 380803 power analyzer, two high precision UNI-T UT-325 digital thermometers, an Extech HD600 SPL meter, a self-designed hotbox, and various other bits and parts. For a thorough explanation of our testing methodology and more details on our equipment, please refer to our How We Test PSUs - 2014 Pipeline post.

The performance of the Antec EDGE 550W unit at room temperature is excellent. The unit easily justifies the 80 Plus Gold certification, reaching a maximum 92.4% conversion efficiency at 50% load. The conversion efficiency is also very stable, with an average of 90.9% within the nominal load range (20% to 100% of the unit's capacity). Naturally, the efficiency of the Antec EDGE 550W unit drops at very low loads, dropping to 74.1% at 5% load. This is the expected behavior of any switching PSU and the Antec EDGE 550W has an output of just 28 Watts at that point; most systems will be closer to twice that power draw at idle, where the EDGE will be more efficient.

The high efficiency and low output of the Antec EDGE 550W translate to low losses across the entire load range. As such, the cooling system can easily cope with the thermal losses of the PSU, maintaining very low operating temperatures without the need to speed up the fan. Even under maximum load, the fan of the Antec EDGE 550W at room temperature is barely audible.

The Antec EDGE 550W PSU Hot Test Results
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  • mindbomb - Friday, October 3, 2014 - link

    This seems like a pretty good psu. Should be enough for an i7 5820k and single gtx 980, with plenty of room left for overclocking.
  • just4U - Friday, October 3, 2014 - link

    The very first thing I look for in power supply reviews is which company is the manufacturer. Some you trust, some your iffy about and others you simply try to avoid. It's sometimes very hard to get that information and companies tend to jump from one manufacturer to the next in the middle of a products life cycle which makes it even harder.

    I am very pleased to see Antec (and Cooler Master come to think of it..) partnering up with Seasonic. It means I will be buying a lot more of their Power Supplies. I am also pleased to see Antect paying more attention to their cabling. It's always been a bone of contention for me and fully sleeved cables with no multi colored wires is always a plus.

    Since I am pretty confident that someone at Antec will read this.. You dropped the ball on a lot of your casing designs of late. The Sonata needs a overhaul and the Lanboy should be a top seller if it's based on it's old Super Lan boy Aluminum design with slight modifications to factor in new cooling and cable management. ( a Removable MB Tray would be nice for enthusiasts to..) It's really not rocket science to figure out.

    Take the Sonata redesign Throw in a power supply like this one and you got a win/win. The Sonata was billed as quiet but yeah.. no it wasn't still it's a popular casing that does need a minor refresh as well..

    Anyway E. Great review.
  • Alexvrb - Friday, October 3, 2014 - link

    I've got a Solo II (part of their Sonata lineup) that's pretty quiet, and has excellent build quality. The HDD suspension system is nice too, as is the SSD mount location. It's probably one of the shortest cases that supports full ATX boards and large graphics cards without major flaws or an insane price tag. With that being said I do feel they could improve on it a bit. But for its size they did quite well.
  • Alan G - Friday, October 3, 2014 - link

    So I can get a Seasonic G550 for about $40 less than this Antec/Seasonic PSU. I also get the same 5 year warranty on the unit and it's Gold plus certified. How do Antec expect to sell their branded Seasonic PSU?
  • Daniel Egger - Friday, October 3, 2014 - link

    It's good to see the reviews finally moving from insanely crazy to regular overkill but 550W is still way out of range of what an average user needs and that's even including a heavy duty graphics card, for those 350W are more than plenty. For "average" by that definition I'd like to see a review of a Seasonic X-400FL Platinum or a similarly good performer. The only point I can see in going for overkill is the better optimum efficiency at medium loads and quite frankly the Antec is simply not that good at this rating and price point...
  • CknSalad - Friday, October 3, 2014 - link

    Antec only makes good PSUs now and even then they can be quite expensive compared to the competition (even SeaSonic). I remember back when Antec was the brand for computer cases with their 900, 300, and sonata series. It's sad to see a once big-name company like Antec be a shadow of their former selves.
  • romrunning - Friday, October 3, 2014 - link

    Thanks for giving us a review on a lower-rated (less than 1kW) power supply! I really appreciate it - these are what I use when building my mini-ITX cases! Well, I also use SFX PSUs like the one Silverstone supplies.

    I would also love to see a test of some common GPUs (single, not SLI/Crossfire configs), Intel i5-i7s, and what is really needed to power such "common" systems.
  • romrunning - Friday, October 3, 2014 - link

    Also, thanks for calling out the price. $120 is a bit steep for a budget/mainstream gaming build.
  • Daniel Egger - Friday, October 3, 2014 - link

    H81/87, Core-i5/7-4xxxS, SSD and GTX 750 Ti OC, BD-ROM are (at the wall) < 30W idle and around 130W if you throw FurMark and wPrime at it; that's already after the loss of the power conversion. You do the math...
  • bsim500 - Saturday, October 4, 2014 - link

    "I would also love to see a test of some common GPUs (single, not SLI/Crossfire configs), Intel i5-i7s, and what is really needed to power such "common" systems."

    As Daniel Egger said - far less than most people think. I have an i5-3570, even OC'd to 4GHz under Prime doesn't break the 100w barrier. Idle's at 37w (with discrete GPU which falls to 26w iGPU only), and it's not even a Haswell. Throw in an efficient nVidia Maxwell based GFX card (eg, 750Ti) and run Prime + Furmark and you're still under 150w under unrealistic synthetic "double power virus" conditions. For most normal gaming, it's nearer 80-120w (for a rig that can run most games at 1080p on console equivalent "Medium" setting) and wouldn't even use 50% capacity of a Seasonic G360. For high end gaming rigs, even a new GTX 970 would remain under 300w (maybe nearer 250w if you undervolted it a little) and easily function off of a decent 500-550w PSU at 50-60% PSU capacity.

    For non gaming rigs, it's more like 40-70w just browsing the web & using office, 100w max full video encoding, etc, and that could easily run off a Pico-PSU laptop style power brick. All above figures on my rigs are measured at the wall with a kill-a-watt on Gold rated Seasonics, not merely 'calculated' from TDP, etc.

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