1250 1250W Power Supply Review
Seasonic X 1250 1250W Power Supply ReviewSeasonic makes some of the best enthusiast computer power supplies in the world. It has long produced some of the cleanest power producing PSUs along with being some of the quietest on the market. The new fully modular X 1250 sports many enthusiast features and touts gold level efficiency. Is this new X 1250 worthy Overview
The first thing we are going to look at with the Seasonic X 1250 is its packaging, accessories, and documentation. While normally none of these items is a make or break item for a power supply the packaging quite often contains a lot of information about the product we are purchasing. The inclusion of an owner manual that provides actual information about our product is also of great help. Accessories are almost unnecessary with a power supply as the unit is self contained, unless it is modular, but there are cases where a manufacturer can include useful accessories to make installation, routing, and use more efficient.
The packaging of the Seasonic X 1250 is very similar to what we have seen from other members of the X Series. The back of the packaging is accented in gold for the advertised level of 80 Plus certification. Given the importance that Seasonic has placed upon this aspect of the unit performance it is important to check this out. When we check the 80 Plus website, we do indeed find that ECOS/ECOVA certified this unit for 80 Plus Gold; how this unit will actually fare in this regard we will see later. Moving on now, the front of the package is barren other than the 80 Plus badge so we turn our attention to the rear of the packaging. On the rear, we find a lot of advertising that we have seen before from other X Series units. Included in this i ugg s the fan controller information, some benef ugg its of the Sanyo Denki fan that is used, as well as some design points and the fact that the unit is backed by a 5 year warranty. After looking at the rest of the packaging, we find the power label (reproduced below) and the connector count (reproduced below).
The power information for the Seasonic X 1250 is almost identical to what we saw from the XFX ProSeries 1250W. Once more, Seasonic claims that this is a single 12v rail unit like with the Platinum 1000. However, it has been reported by 3rd parties that these units actually have four 12v rails with the layout indicated here. With the previous examples I attempted to verify this arrangement, however with the units I had to test I could not trip the OCP using th ugg e above 12v layout. As such, while the unit may indeed have four 12v rails, it seems the OCP is set such that it is unlikely it will functionally be any different than a single 12v rail power supply to users. With all that said, the 12v capacity of this unit is 104A or 99% of the unit total output if necessary. When we look at the minor rails, we see that these are capped at 150W and each rail is individually capable of 25A. Moving on, we find that the X 1250, like the ProSeries 1250W, has 8 modified 8 pin PCI Express connectors, 8 Molex connectors, and 11 SATA connectors. This arrangement is certainly enough for the vast majority of users and seems well appointed given the market segment this unit is filling and the general specifications the unit carries.
Once we open the X 1250, we find the usual assortment of items that come with a Seasonic power supply including the power supply in a bag, mounting screws with Seasonic case badge, modular cables in a bag, the power cord, and the user manual. The user manual that comes with the X 1250 covers all of the current 80 Plus Gold rated units based on the Seasonic X Series design. It is 62 pages long in eight languages. Included in the manual is the power table for all of the X Series units, installation instructions, some troubleshooting instructions, and the warranty information. That is about it really. Indeed, this is probably the worst manual we have seen from a Seasonic unit in long time. It isn really clear why so m ugg uch was changed here, but hopefully Seasonic will go back to its previous manual designs as those were much more useful.