Specifications

The PSU is very strong with its 1350 W maximum nominal capacity and a 1500 W peak. Both can be delivered at up to 50°C, and Silverstone states that the PSU can deliver 1080 W at even 60°C! This is one of the very few PSUs that provides a power rating for such a high operating-temperature.

Efficiency is Silver and available protections include everything but OTP. The manufacturer probably considered OTP unnecessary with such a wide temperature-range during operations, but we would still like to see it included.

The small fan that handles the cooling of this beast uses double ball-bearings for increased lifetime and is mounted on the front of the PSU, which is rather outdated since almost all current PSUs utilize a much larger, top-mounted fan to allow for a lower RPM that provides better cooling and less noise output.

The PSU is very long, so you should check to see if your chassis can accommodate it before purchasing the Zeus. This is one of the heaviest PSUs we have ever encountered. The warranty is long and its price is quite stiff, putting this unit into the high-competition zone where its adversaries feature similar capacities with Gold and Platinum efficiency ratings.


Its overall power-output is high; however, the power that the +12V rail(s) can deliver is "restricted" to 1260 W. We wonder why its manufacturer set such a low limit for the +12V rail since the PSU utilizes DC-DC converters for the generation of the minor rails. Also, the minor rails are too strong for today's needs, and the 5VSB rail has sufficient capacity to cover any system.

Cables & Connectors, Power Distribution

The PSU is equipped with enough cables and connectors to power every system out there. Especially the number of SATA connectors is insanely high, while the number of peripheral connectors is conservative. The main ATX cable is strangely short, and an additional 100 mm would have been ideal given this PSU can only be installed into a full-tower case; it simply won't fit into a smaller case. The length of the second EPS connector is small as well, and the same applies to the length of all PCIe connectors. We really do wonder why Silverstone restricted the length of most cables to 500 mm since, as we have already stated, this unit only fits into a large full-tower case.

The 24-pin ATX, EPS and PCIe connectors use 16AWG gauges for lower voltage drops, while the other connectors utilize normal 18AWG wires.

The ZM1350 can toggle between single rail and multi-rail mode through the flip of a switch, so let's take a look at the power distribution of the +12V rail.


Power distribution is good since each one of its EPS connectors is fed through a dedicated rail. Each one of the 12V4, 12V5, and 12V6 rails feeds two 8-pin PCIe sockets, and a possible problem could occur if you use both cables that feature double PCIe connectors on sockets that are powered by the same rail. You had better pay some attention to the cables connecting with the modular PCB, or simply engage its single +12V rail mode; that is, if you plan on using all PCIe connectors.