Articles: Cases/PSU

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The PSU is cooled with a Martech DF1352512SEHN fan. The brand is known far less than Yate Loon. It is a 140x140x25mm thing with a metallized coating of the impeller. The fan is highlighted with four blue LEDs.

As opposed to fans made from translucent plastic, the metallized coating reflects lights but does not diffuse it. As a result, the PSU is not so much shining itself as illuminating the innards of your system case.

The cables are organized like in the previous two models. They are sorted by application. This may save you a few minutes which you’d otherwise spend to untangle the cables before assembling your computer.

The PSU is equipped with the following cables and connectors:

  • Mainboard cable with a 24-pin connector (60cm long)
  • CPU cable with an 8-pin connector (60cm)
  • CPU cable with a 4-pin connector (60cm)
  • Graphics card cable with an 8-pin connector (46cm)
  • Graphics card cable with a 6-pin connector (56cm)
  • Cable with one Molex connector (34cm)
  • Cable with one Molex connector (44cm)
  • Cable with one Molex connector (64cm)
  • Two cables with two SATA power plugs on each (49+15cm)

  • USB cable (65cm)

Thus, this PSU has the same cables and connectors as the 4M630 model. And it comes with the same set of adapters: one adapter from a graphics card’s 8-pin into 6-pin connector, two Molex→2xMolex splitters, and two splitters with a floppy-drive connector.

The PSU has four “virtual” +12V lines with a max current of 18A on each, but not more than 52A in total. The combined load capacity of the +3.3V and +5V rails is high at 180W. The latter is not demanded by today’s computers, though. Modern systems load the +12V rail the most.

The PSU worked without overheat or instability at loads from 50 through 660W. Together with an APC SmartUPS SC 620 the power supply could work at loads up to 385W (from the mains) and 335W (from the batteries). The UPS switched to its batteries and back to the mains without problems.

The output voltage ripple is within the norm even at full load.

The circuit design of this PSU is identical to the two previous models’, so there should be no big difference in their characteristics. Indeed, the voltages boast superb stability. The PSU can work at any balance of loads without violating the permissible deflections of the voltages.

The PSU is 85% efficient through a wide range of loads. Its power factor is 0.99 at the maximum.

This model proved to be somewhat worse than the previous ones in terms of noisiness. Its fan is rotating at about 1000rpm under low loads. When the load grows up, the fan speed changes in two steps for some reason. Anyway, although this PSU is somewhat noisier than the 4M630 and 4M880, it does not get uncomfortable on your ears.

Of course, the main and the only difference of the HPU-5M680-PE from the 4M series models is the integrated 8-port hub plus the ninth port for powering USB devices. This functionality is not redundant because nearly every modern peripheral device – drives, printers, scanners, web-cameras, keyboards, mice, joysticks – has transitioned to the USB interface. As a result, the mainboard’s default four or six external USB ports may not be enough and you have to use a USB bracket (two or four ports per bracket) or an external hub. An external hub often has one limitation. The total consumption of all the connected devices must not be higher than 500mA or the hub has to be plugged into a wall outlet. And wall outlets may often be as scanty as USB ports. The hub integrated into the Hiper HPU-5B680-PE solves this problem in an obvious way: its gets its power right from the PSU it is located in.

Of course, an integrated hub is not a killer feature you can’t live without. But this functionality distinguishes the Hiper HPU-5B680-PE from its opponents many of which are manufactured at Channel Well’s facilities, too.

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