Articles: Cases/PSU

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Cables and Connectors

The PSU offers the following cables and connectors:

  • Mainboard with a 20+4-pin connector (50cm long)
  • CPU cable with an 8-pin connector (53cm)
  • CPU cable with a 4+4-pin connector (53cm)
  • One cable with one 8-pin and one 6-pin graphics card connector (54+15cm)
  • Three 8-pin connectors for graphics card cables
  • Three 6-pin connectors for graphics card cables
  • Four 6-pin connectors for peripheral power cables

The cables are sleeved. The wires of different cables only tangle near the PSU case.

Included with the PSU are:

  • Three cables with one 6+2-pin graphics card connector (50cm)
  • Three cables with one 6-pin graphics card connector (50cm)

  • Two cables with four Molex and one floppy-drive plug on each (50+15+15+15+15cm)

  • Two cables with four SATA power plugs on each (50+15+15+15cm)

Although the graphics card cables have 6-pin or 8-pin connectors on both ends, you must plug them in a specific way. There is a paper sticker near each connector indicating whether it goes into the graphics card or power supply. I don’t quite grasp the purpose of this solution. It would be simpler to put identical connectors on both ends of the cable.

The manufacturer might have also included one more cable with SATA power plugs into the box. The PATA interface has already become obsolete together with its 4-pin power connector, and it would be better for a new PSU to offer more SATA plugs. Two cables with four connectors on each may be not enough if you are going to install the NRP-HC1501 into a system case with a couple of optical drives and a serious disk array with five or six HDDs.

It is all right with the graphics card cables: the eight available connectors can be used to power four top-end cards simultaneously. Four connectors are of the 6-pin variety, and the other four are 6+2-pin ones.


The PSU offers a peak continuous output power of 1500 watts, but you can only achieve this load on a testbed. Not only because modern computers consume much less, but also because these 1500 watts must be equally distributed between the two sub-PSUs described above – 750 watts for each.

The PSU has two truly independent +12V power rails each of which is additionally divided into two “virtual” lines. The different lines have different peak currents. The 12V3 and 12V4 lines offer the most amperes and it is to them that the detachable graphics card cables are connected (up to six cables).

The allowable distribution of load among the different power rails matches the overall output power of the PSU.

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