Articles: Cases/PSU

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Cooler Master Real Power Pro RS-A00-EMBA (1000W)

The first thing striking your eye in this PSU is not some design feature, but a yellow-and-black sticker that warns you against plugging the PSU into wall sockets rated for a current below 10A (or below 15A for the 110V power grid). I guess the old joke that you’ll need a separate wire from the power distribution unit for the computer, just like as for an electric oven, is getting closer to the truth now. Of course, these requirements to the wall outlet are only applicable when your computer indeed consumes 1000W from the PSU. Otherwise, the Real Power Pro can be safely plugged into wall sockets rated for lower currents.

Although this PSU doesn’t look large, it is actually longer than a standard ATX unit by 40 millimeters. The appearance proves misleading due to the 135mm fan. If there was a 120mm fan inside, the PSU would look larger. The length of 180 millimeters is not a record, though. For example, the PSU from PC Power & Cooling is 230mm long, having the same wattage.

The components are rather densely packed inside. You can see two absolutely identical power transformers here. The PSU implements a rather original solution when the transformers are working in sync, each of them bearing half the total load. I think the main reason for this solution is that a 1000W power transformer is too large and wouldn’t fit into the PSU. The maximum height of the transformer is limited by the need to leave some room at the top for a fan. Two transformers, each with half the necessary capacity, take more length, but less width and height.

The heatsinks are designed in an original way: their long narrow ribs have a square section instead of being thin and rectangular. I guess this helps to distribute heat more uniformly along the entire length of the ribs. You can see black rings on two ribs: these are fastenings of the thermal resistors of the fan speed management system.

The declared output power of 1000W is continuous rather than a peak one, and the PSU can yield most of it via its +12V power rail. The latter has six output lines with a current limiter of 18A on each. This division is “virtual”, meaning that there is only one +12V power rail inside the PSU and it is split at the output into two lines (there are two 40A filtering chokes instead of a single 80A one) and then into six lines by means of limiting the allowable load current.

Interesting in this PSU is the high allowable load on the +5V standby source, up to 3.5A.

Judging by the UL certificate number (the third one from the left in the bottom row of symbols on the PSU label), the actual manufacturer of this PSU is Enhance Electronics, a well-known firm with a good reputation. To remind you, Cooler Master’s PSUs of lower wattages are produced by AcBel, but the latter probably does not produce 1000W units.

The PSU offers the following cables and connectors:

  • Mainboard power cable with a 20+4-pin connector, 50cm long
  • CPU power cable with a 4-pin connector, 50cm
  • CPU power cable with an 8-pin connector, 50cm
  • Two graphics card cables with 6-pin connectors, 50cm
  • Two graphics card cables with one 6-pin and one 8-pin connector on each, 50+15cm
  • Two cables with three Molex connectors and one floppy mini-plug on each, 47+14+14+14cm
  • Two cables with four SATA power connectors on each, 48+15+15+15cm

So, this PSU can be connected without adapters to any home PC configuration you can think of, including configurations with two GeForce 8800 GTX and a RAID array consisting of a dozen hard disk drives.

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