Specifications

Efficiency is Gold, and the unit features a semi-modular cabling design. Its maximum operating temperature at which it can deliver its full power continuously is 40°C. However, it can operate at up to 50°C, but only for as long as it delivers no more than 80% of its max-rated-capacity continuously. All protections have been included, which is great since we plan on putting this PSU through a lot of tough tests, and we definitely don't want to see any dramatic situations arise due to high temperatures in such a tough testing scenario.

A high quality, 120 mm FDB fan keeps the Edison M-650 cool. A 140 mm fan should have been used as it can deliver just as much airflow at a lower RPM and, as such, less noise. According to some manufacturers, smaller diameter fans deliver more focused airflow, which has them prefer smaller units for PSUs with smaller PCBs; however, we believe that it is better to use a large fan in highly efficient units with restricted energy losses to decrease noise output. The Edison unit is pretty compact given it is only 16 cm long, and at five years, its warranty is long enough.

There is only one +12V rail, and it can deliver the unit's full power alone, while the minor rails can deliver 100 W combined, which is enough for most systems. The 5VSB rail has the typical amperage for PSUs with such a capacity.

Cables & Connectors, Power Distribution

The most impressive part here is the fact that Fractal Design equipped the unit with six PCIe connectors. They had to ditch the second EPS connector to do so, which is a small matter as most wouldn't have put it to use. There are more than enough SATA and peripheral connectors for this unit, and their cable length is satisfactory, although we would feel more comfortable with a slightly longer main ATX cable (at 60 cm instead of 55 cm). The distance between connectors is good, and since Fractal Design has a ton of experience in designing cases, they equipped the Edison M-650 with short SATA and 4 pin Molex cables should you want to use the unit with a small case. Finally, all cables use standard 18AWG gauges.

Since this PSU features a single +12V rail, we do not have anything to comment on when it comes time to talk about its power distribution.