Articles: Cases/PSU

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The PSU offers the following cables and connectors:

  • Mainboard power cable with a 24-pin connector, 54cm long
  • CPU power cable with a 4-pin connector, 55cm
  • CPU power cable with an 8-pin connector, 55cm
  • Two graphics card cables with two 6-pin connectors on each, 54+15cm
  • Two graphics card cables with 8-pin connectors, 55cm
  • Two cables with two Molex connectors and one floppy mini-plug on each, 50+24+15cm
  • One cable with two Molex connectors on each, 50+24cm
  • Two cables with three SATA power connectors on each, 50+24+24cm

The PSU has 6-pin as well as 8-pin connectors for graphics cards. The latter are labeled as “PCI Express” for you to not confuse them with the 8-pin CPU power connector. The CPU power cable has no such label.

The PSU yields stable voltages under any allowable load, but the +12V voltage is considerably higher than necessary (it remains within the allowable limits, though).

Strictly speaking, the level of output voltages can be described with two parameters. One shows how far the average value of a voltage deflects from the nominal value (this parameter is often referred to as Voltage Range or just Range). The other, usually called Line Regulation, shows how far the minimum and maximum of a voltage stand from each other. So, if the PSU yields a minimum of 12.25V, an average of 12.3V and a maximum of 12.35V, the Voltage Range (the average deflection from the nominal value) is 2.5%, yet the voltage fluctuates little around that average value, by less than 0.5% (Line Regulation).

To cut it brief, it is better to have large same-colored areas on the cross-load diagram, even if their color is not green, than narrow bands from red on one side of the diagram to green in the middle and then to red again on the other side. We’ve got the former case with the SilverStone Olympia OP1000.

The output voltage ripple at max load is on the verge of the allowable: 50 millivolts on the +5V rail (50 millivolts is the allowable maximum, actually) and about 100 millivolts on the +12V rail (120 millivolts is allowable).

The PSU employs a Sunon PMD1208PTB1-A fan that can reach a speed of 4700rpm at 12V voltage and 4.8W output power. The fan has standard dimensions of 80x80x25mm and seven blades.

Although the fan speed is lower than that of the Turbo-Cool 1KW-SR, the Olympia OP1000 is only really quieter at loads from 300 to 600W because the 1KW-SR increases its fan speed continuously while the OP1000 begins to do that only from a load of 500W.

The PSU meets the 80 Plus requirements, at least in a 220V power grid (its efficiency is going to be a little lower in an 110V grid). The average efficiency is about 83% with minor fluctuations depending on load.

So, the SilverStone Olympia OP1000 performed not much worse in my tests than the Turbo-Cool 1KW-SR despite the use of a traditional circuit design. The latter PSU has somewhat more stable voltages and lower output voltage ripple at full load. The OP1000 easily meets the requirements of the ATX12V and EPS12V standards, though, and won’t provoke any problems at work. It may prove somewhat too noisy for home use, though.

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