Specifications

Besides the Platinum efficiency, this unit is equipped with a full set of protections since even the rare OTP (Over Temperature Protection) is included. The cooling fan features double ball bearings for extended lifetime so along with the Japanese capacitors and the seven year warranty you will have an absolute peace of mind. Its length is not small at 190mm but most mid-full towers will accommodate it without any problems. The weight is relatively low since we weighted it without any modular cables attached. On top of that in a platinum efficiency unit the heatsinks are not large since heat dissipation is kept low. Finally, the price Seasonic asks for the SS-1000XP looks a little bit high since the direct competitor, KINGWIN LZP-1000, costs $30 less.


There is one, powerful, +12V rail which can deliver the full power of the PSU. The minor rails are kept to only 125W max combined power but a modern system will not ask for more. On the contrary, since we are talking about a 1kW PSU here, we would like to see at least one Ampere more at 5VSB.

Cables & Connectors, Power Distribution

The available connectors are enough for the unit's capacity and their lengths are adequate so you won't meet any problems even in very large tower cases. Also the distance among the connectors is the right one, according to ATX spec.
As you can see in the table above there are six PCIe connectors which in pairs start from a common connector but immediately split into two separate cables. There are also two EPS connectors which can be used at the same time with the six PCIe ones. The EPS and PCIe connectors use thicker, 16AWG, wires while all other connectors, including the 24pin ATX, use 18AWG gauges. We would highly prefer the 24pin ATX to use 16AWG gauges too for smaller impedance, something that would lead to lower voltage drops on the minor rails, especially at high loads.

Since this PSU features a single +12V rail we do not have anything to comment about its power distribution.