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PSU Seasonic X-1250 SS-1250XM Review

Power supply unit Seasonic X-1250 is a senior product of X series that includes units from 400W to 1250W power. The two junior models are absolutely passive, while all other models feature hybrid cooling schedule. This implies that on conditions of little loading, the integrated fan stops its operation; and vice versa, when the loading is increasing, the fan's operation is more intense. PSU X-1250 is quite powerful to serve the needs of high-performance systems that require stable and efficient power to all key components.

Basic Features

Power supply unit Seasonic X-1250 is delivered in a spacious cardbox which contains a set of cables for the connection of PC components. The unit is housed in a dull black casing with stamped yellowish grid. The whole construction is 190 mm in length (+20 mm for cable connectors), so it won't suit compact-sized PC chassis. All basic specifications are indicated on the casing: the availability of +12VDC line that demonstrates 1248W power at 104A. The correlation of line power and full power equals to 0.998 that is a favorable index for such type of units.

Sockets and Connectors

This unit employs modular connection system of cables with sockets for providing power supply to the main PC components. Such framework allows removing all unused cable wires to offer more spacing within the chassis. It should be mentioned that the customer is capable to remove absolutely all cables, including chief ATX and CPU power sockets. The number of sockets and their localization on wires is quite optimal. Cable length is also appropriate and sufficient for the PSU installation into Full-Tower enclosures. Besides, the unit suits as chassis with top PSU localization, so with bottom localization.

In general, the nominal delivery kit includes the following cable sockets:
1. 4-pin Peripheral socket with eight ergonomic connectors;
2. 4-pin Floppy Drive socket with 2 connectors (employs adapter from Peripheral socket);
3. 6-pin PCI Express 1.0 VGA Power socket;
4. 8-pin PCI Express 2.0 VGA socket with eight demountable connectors;
5. 8-pin SSI Processor socket with two connectors (one of which is demountable);
6. 15-pin SATA socket with eleven connectors on four wires;
7. 24-pin Main Power socket with one dismountable connector.

Cooling System

The model is furnished with a 120 mm fan, codenamed San Ace 9S1212H403, produced by SanyoDenki. It is able to develop the maximal rotational speed up to 2700 rpm on nominal power supply. All independent power converters on +3.3VDC and +5VDC lines are located on a separate board with output sockets. At the same time, semiconductor elements of high-voltage segment are located on several compact fins; synchronous rectifier transistors found their places on the reverse side of the main circuit board.

Consumer Quality

The most beneficial environment for Seasonic X-1250 is supposed to be a high-performance system with a rather powerful graphics subsystem based on several top cards. This way, the unit will get an opportunity to demonstrate all its facilities and advantages. Still, acoustic ergonomics leaves much to be desired, so customers should be prepared to get a certain level of noise even on idle operation.
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  • 15 November 2012, 18:33
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