Sub-$75 Mainstream Power Supply Roundup

In our last PSU article, we reviewed a bunch of relatively expensive high-performance devices suitable for powerful gaming computers and workstations. The average user typically prefers something a little bit more affordable, though, which is why today we're reviewing a handful of PSUs that can be found for around $75.

The potential reasons for buying a new PSU are many. Perhaps you've added a new graphics card, upgraded to a high-performance CPU, or are just replacing a faulty unit. A normal system usually doesn't require a high-end PSU. In most cases, the consumer is simply on the lookout for a cheap (and at the same time reliable) power supply at a reasonable price, so that's precisely what we decided to look at here.

The request we sent to manufacturers was simple: send us PSUs with a maximum street price of $75, regardless of wattage, features, or 80 PLUS certifications. What do you get in this price range?

Unexpected Early Goodbye

Our first test was originally made up of nine PSUs ranging from 400 to 500 W. We say "originally," because the AXP 500P12P died just as testing was getting started. With a load of 380 W, the 500 W PSU gave out a loud bang, sent sparks flying, and finally vanished in a smoky death. Since we were not expecting something like that at such an early phase in the testing, we'll give AXP the chance in a later article to prove that this was an isolated incident.

Then There Were Eight

Eight test candidates ultimately made it through the tests performed in our laboratory. Antec, Chieftec, Corsair, Enermax, FSP, Huntkey, Xigmatek, and a new AXP 500P12P were all included at capacity points between 380 to 500 W. That's enough power for most office and home entertainment computers. Despite a low street price of roughly $75, six of the PSUs even managed to achieve coveted 80 PLUS certifications. Antec, Chieftec, Corsair, Enermax, Xigmatek, and Huntkey all step things up with a Bronze-level cert. In order to earn that badge, PSUs must reach the following efficiency goals at 115 V: 82% at 20% of maximum power, 85% at 50% of maximum power, and 82% at 100% of the maximum power.

The AXP PSU can only do that under 230 V and thus cannot get certification. Similarly, the FSP PSU is only intended for 230 V applications and thus cannot receive the certification either. The pair of PSUs is completely useless here in the US. Nevertheless, our measurements will show whether they can still impress the European crowd.

Noticeable Differences In Quality

While we wanted to stay impartial before the testing, we couldn't help but notice the differences in quality during the unboxing process. Manufacturers tried to keep costs under control by skimping on the number of connectors, as well including shorter, lower-quality cables. None of these models feature a modular cabling design. Even the packaging is rather stripped-down. Further, the low weight of some PSUs at least suggests the use of cheaper components. This may not reflect immediately in testing. However, the power supplies might not last for as many years or support the same load strain as PSUs with higher caliber components.

Unfortunately, we did not get to see whether the PSU from AXP could hold its own against the other supplies, despite its lack of 80 PLUS approval. As with our first sample from the company, the second never even made it past the warm-up phase of testing. At a load of around 420 W (mind you, this is a 500 W PSU), several of the voltages rapidly dropped, the PSU produced some banging noises, sparks flew, and eventually the unit went up in smoke. After that, it wouldn't operate anymore and smelled like, well, fire. This video documents the failure of the PSU quite impressively. Check it out if you dig things going "pop."

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  • mi1ez
    1) Stop moaning about PSU.s that aren't available in the US.
    2) Where are the actual voltages for each rail? It feels like most of this test is missing!
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  • swamprat
    I can't say I've read every page - but are there noise readings anywhere as well as the occasional comment like "it's quiet"?
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  • Anonymous
    Small PSU means desktop/media.... and since the conclusion was "they're all pretty similar" then noise is going to be one of the main selection criteria. So... no real help in choosing :(
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  • stone-69
    Uhm... just a newbie question :
    Are cheap PSUs really that bad ?
    I mean I've seen a lot of people basically saying that a cheap PSU will make your PC explode (or something along that note), but I've seen very few thorough reviews of cheap PSUs testing ripple, noise and voltage drops.
    Could this be an idea for a future article ?
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