450 Power Supply Review
Seasonic G Series: G 450 Power Supply ReviewSeasonic is continually short on marketing but long on performance, and we are good with that. Today's 450 watt G Series computer power supply makes more sense in this new world of lower power desktop CPUs and GPUs. Does the G 450 give its users solid power in this lower end of the spectrum range at the right cost
The Seasonic G 450 is the latest in a long line of power supplies that we have seen from Seasonic and it is the smallest member of the G Series we have seen to date. Given that we have seen a couple of previous examples from the G Series, we have high expectations for this unit. Indeed, given what we seen from all of Seasonic's power supplies that we have reviewed to date we have high expectations for this unit. That said, the higher the expectations the harder it is to live up to those expectations. So, was the G 450 able to live up to the expectations Or does this unit fall a bit short Let see.
HardOCP testing methodology is intended to very much push power supplies to their advertised wattage rating in temperatures that will represent some of the hottest computer enthusiast cases. So if a unit passes all our testing it is definitely not something to take lightly. In fact we expect more power supplies to fail our testing than make it through unscathed.
Overall, the build quality of the Seasonic G 450 is identical to what we have seen from the G 550 and the G 750 before. While excellent, Seasonic has done a few things to intentionally differentiate this product from its higher end offerings. Externally, the G 450 has a rather generic exterior finish with just a G Series sticker and it is only semi modular. When we move to the interior of the unit, we see that we are looking at the same layout that we saw from the G 550 and G 750. The actual integration is identical to what we saw from the G 550 and G 750 as well. When it comes to component selection, the standard capacitors are provided by Nippon Chemi con and Rubycon and the solid capacitors are provided by Enesol; again just as with the G 550 and G 750. Also as before, this unit has an ADDA fan rather than the much higher quality Sanyo Denki we have seen before in Seasonic X Series and PLATINUM Series units. To some this may not mean much, but this is a significant step down in quality that is perhaps fitting for a lower end product. This package is all backed up by a manual that is still badly constructed and a 5 year warranty which is great for a mainstream product like this unit.
The overall load testing results for the Seasonic G 450 were very good like what we saw from the previous G Series units. The voltage regulation was again very good. In our testing today, we saw that the 12v rail dropped by 0.11v and the minor rails dropped by up to 0.06v. These values are very much like the range we saw from the G 550 and G 750 and much better than the only recent (though perhaps not truly comparable) 450W unit we have seen; the SilverStone ST45SF G. When we look at the efficiency, we see that this unit was 85.65% to 89.38% efficient at 120v and 84.66% to 88.35% efficient at 100v. When we ran the 80 Plus tests, we saw efficiency values of 87.40% 90.14% 88.87% for the G 450 which puts this unit right in its claimed 80 Plus Gold category.
The Transient Load Tests results for the Seasonic G 450 are rather good overall, particularly when you consider how small of a unit this is in capacity. When directly loaded, the 12v rail showed a peak change of 280mV and the 5v rail had a peak change of 130mV when directly loaded while the unloaded 5v peak change during a 12v load was 105mV. These results put this unit mixed compared to the SilverStone ST45SF G which is ok, but not really outstanding as that unit is really handicapped a bit. Otherwise, the unit does fit into Sesonic's product structure appropriately so that is a good thing to see here.
Moving on to the ripple/noise values today, we see that the G 450 is generally posting very good results. The peak 12v trace amplitude was 25mV while the peak 5v trace was 20mV and the peak 3.3v trace was 10mV. While these results are good on paper compared to the ATX12v specification limits, the competitive landscape is such that we don have a lot to compare it to. The SilverStone ST45SF G had worse results than what we saw from the G 450 so it is at least doing better than the most recent 450W unit we have seen. Compared to previous G series units though, these results roughly fall into the exact same range. So, with little to compare this unit too, we are going to just have to default to what we have said about those other units. These results are good by the ATX12v specification limits and the limited "competition" we have seen.
Over the years, Seasonic has established itself as one of the go to OEMs for quiet power supply solutions and, for the most part, our testing of its units has seemed to parallel this reputation. When we saw the G 550 and G 750, we saw this streak continue for all intents and purposes. Today, the G 450 posted essentially the same results in this aspect of our evaluation as those previous units. Indeed, the peak noise output with this unit seemed to occur during the Torture Test as has been the case with this series so far. During Test 4, when the load was greater, the noise output was a bit lower than the final values reached during the Torture Test. In the end though, the G 450 is a quiet power supply. Now, it may not be the quietest power supply on the market, but for the vast majority of users it will be far quieter than they imagine. For those that demand an even quieter solution, Seasonic has higher quality offerings and other variations of the G Series platform from other vendors have you covered as well.
People a lot of times ask, "Why don't companies make very high quality low powered power supplies Well today you can see the answer with the Seasonic G 450 which is a high quality low powered power supply by modern senses. It's like in real estate except instead of "location, location, location," it is "production cost, production cost, production cost." Once you design a truly modern, high performing, power supply and stock it with high end components your price ends up being not much less than that of the more expensive larger capacity products in that series. And that does not make great business sense for the manufacturer or the customer. Without fail someone will then try and make the argument "but power costs." Even in Europe that is a bad argument particularly as the efficiency curve of units becomes more and more of an efficiency line than a curve and the 1% to 2% efficiency does net you much savings anyway. No, in the end, while it is great to have products like the G 450 available I would not expect to see lots of companies jump at the idea of producing premium 450W or below power supplies unless those are something truly special or fanless as the market will not likely support the required price point. That said, those few, like Seasonic,Cheap hockey jerseys custom from canada or toronto factory, that have gotten product lines in this realm that have a good reputation and support will be in decent shape and provide those few people who want it a solid product.
Overall, the Seasonic G 450 continues the trends we have seen from the Seasonic G Series by doing very well in almost all of our performance metrics. Among the things that this unit did well are the outstanding build quality for its product segment, the excellent voltage regulation, the excellent efficiency, the very good Transient Load Test results, and the low noise output. Certainly while not bad, the DC Output Quality was probably the closest thing that actually came to be "just good" from the results we saw today. That all said, potentially one of the most scrutinized things about this unit is going to be the price. As it stands now, this unit can be found for $74.99 with Prime Shipping. For a 450W unit, that is going to be steeper than what the majority of people want to spend this day and age. It does buy you a high quality unit, but if you can spend just $10 more to get the equally good G 550 with Prime Shipping, would you buy the 450W model I don't know, but as pricing fluctuates and separation in pricing occurs this unit we remain one that you won't regret buying from a quality and performance stand point.
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