Power Supply Roundup: 730W to 900W

Amacrox Freestyle - 750W

Amacrox is well known in the European market, providing good quality at an affordable price. The ODM (Original Design Manufacturer) is FSP, also known as Fotron Source - one of the five largest power supply manufacturers in the world. Amacrox is one of several retail brands FPS uses. The Freestyle 750 has a shiny appearance and contains a 12cm fan on the bottom of the power supply. The packaging is quite nice and gives potential buyers a good view of the power supply in retail shops, since there is a small window that allows a look at the power supply inside. Besides the standard short manual, the box also includes a bag in which you can store unused cables.

We find four 12V rails rated at 20A each, and a combined power of 725W. The 3.3V and 5V rails both provide 30A. The description Amacrox provides about which connectors are powered by the various 12V rails is a nice addition. 12V1 is connected to both of the CPU connectors in form of the 4-pin and 8-pin and ATX connectors, 12V2 handles the first two graphics cards, and 12V3 is for peripherals such as hard disks and optical drives as well as the motherboard. The 12V4 rail keeps the next round of graphics cards running.

Cables and Connectors

All cables are sleeved, with the PCI-E harnesses in orange color instead black. There are several other differences between this PSU and the other units. Amacrox has more SATA than Molex connectors attached while other manufacturers take the reverse approach. The two 6-pin and 6/8-pin PEG connectors (four total) on the 750W unit provide enough power for most graphics configurations.

Opening the unit reveals a standard FSP topology with three heatsinks. FSP uses components that won't generate too much heat, which also results in a better efficiency. The heatsinks can therefore be a little thinner and not quite as large/heavy. We'll see a similar approach in the Seasonic power supply. The Taiwan Oster Corporation manufactures the primary cap, and it seems to be a cheaper offering than what we'll see elsewhere. The secondary side uses capacitors from CapXon.