Articles: Cases/PSU

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Xigmatek “No Rules Power” NRP-MC651 (650W)

The relatively young company Xigmatek, founded in 2005, has something in common with Thermaltake whose power supply I have discussed in the previous section. Both companies began their business by producing cooling systems.

Today, Xigmatek offers power supplies, too. This model features original packaging. Its black cardboard box is wrapped into a cover painted the color of jeans.

And when you take a look at this power supply, you can see right away that the similarity between Thermaltake and Xigmatek goes beyond the type of products produced. In fact, the two power supplies from these brands covered in this review differ in one thing only: the NRP-MC651 doesn’t have the exclusive QFan slits around its perimeter.

The reason for this striking similarity is obvious: power supplies for both Thermaltake and Xigmatek are produced by Channel Well. This manufacturer has enlarged considerably its market share by producing PSUs for well-known retail brands. That’s why you can see power supplies from CWT in nearly every of our reviews.

The NRP-MC651 is a modular power supply that has fixed cables for mainboard, processor and two graphics cards. There are seven connectors for the rest of components. The connectors differ in shape and color, so you can’t do anything wrong. For more convenience there is a picture with instructions what cables go where.


The internals doesn’t differ much from those of the Toughpower QFan except for the shape of the heatsinks which are flat in Thermaltake’s power supply and more intricate here. The circuit design hasn’t changed. The PSU is based on a Champion CM6800G controller and features both active PFC and dedicated voltage regulation. A 390µF/400V capacitor from Hitachi is installed at the PSU’s input. Instead of Samxon capacitors as in the Thermaltake product, the PSU’s output has KZE series capacitors from the more renowned United Chemi-Con.

The assembly and soldering are very neat. I have no complaints about that.

The PSU is cooled with a 140x140x25mm fan (Yate Loon D14BM-12) whose case and impeller are made from translucent plastic and highlighted with four LEDs at work.

The PSU has the following cables and connectors:

  • Mainboard cable with a 20+4-pin connector (50cm long)
  • CPU cable with a 4-pin connector (50cm)
  • Two graphics card cables with one 6+2-pin connector on each (50cm)
  • Four connectors for power cables of hard and optical drives
  • Two connectors for graphics card cables
  • One connector for a CPU power cable

Included with the power supply are:

  • CPU cable with an 8-pin connector (50cm)
  • Two graphics card cables with 6-pin connectors (50cm)
  • Two SATA power cables with three connectors on each (50+14+14cm)
  • One cable with three Molex connectors and one floppy-drive plug (49+15+15+15cm)
  • One cable with four Molex connectors (50+14+14+14cm)
  • One cable with three Molex connectors and one floppy-drive plug (50+14+14+14cm)

So, this is a sufficient selection of cables. The PSU allows to connect two graphics cards with two power connectors on each without any adapters.

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