Cooler Master Real Power Pro 1250 Watt Power Supply
Author: Frank Stroupe
Editor: Shawn Knight
Date: 03-24-2008
Provided by: Cooler Master
A Closer Look

The Real Power Pro 1250 sports a shiny black powdercoat. It has a single 135mm fan, a popular configuration nowadays.

Cooler Master has done well to keep the PSU down to a relatively small footprint. At just over seven inches long, its about 2” longer than the average square-cased single 120mm fan PSU, and about 1” longer than two different economy 850 watt PSUs I have. It is actually .25” shorter than a high-end modular 850 watt PSU of mine, the difference in the length being the due to the modular panel. The Real Power Pro 1250 should easily fit in any full tower, and should fit in most mid towers without a blowhole fan.

The PSU is quite heavy, weighing in at somewhere between 11 and 12 pounds… my postal scales only go up to 10.4 pounds, so I had to use my bathroom scales, and I really couldn't tell exactly. I thought that the high-end 850 watt PSU I just mentioned was heavy, it weighs about 9.5 pounds.

The Real Power Pro 1250 is one of 10 power supplies receiving nVidia's highest SLI rating, for three 8800 Ultras or 8800 GTXs. It also has an 80Plus certification, certified to maintain more than 80% efficiency. Actually, this power supply is rated up to 87% efficiency. What does that mean? A more efficient power supply uses less wall current than a less efficient one, which means less dollars out of your pocket.

The Real Power Pro 1250 also has a five year warranty. Three years is the industry standard, and not many companies offer five year warranties.

Looking at the specs chart, I really don't know what to say. Six +12v rails, three at 28A and three at 20A. That is just so amazing. 1250 watts is the continuous power output, and the maximum power output is 1375 watts. This is one powerful mother!

I guess that some people would freak out at there not being any switches on the rear of the unit. I guess I might too, but my very first review was of a really high end power supply that had no switches either. If you need to cut standby power, just unplug the unit. There is an LED to let you know if the unit is being powered or not.

The power supply is not modular, but neither are most large power supplies. Cooler Master does have modular power supplies in the Real Power line, but the Real Power Pro PSUs are not modular.

The Real Power Pro 1250 has nice long cables that should be plenty long enough for a full tower. The cables are all totally sleeved in black nylon mesh and finished in heavy heatshrink tubing. Connectors are:

1 x Main connector (24Pin)
1 x 12V(P4)
1 x 12V(8Pin)
7 x peripheral
8 x SATA
2 x Floppy
7 x PCI-E

There are seven PCI-E cables: three cables with a 6-pin connector only, one cable with an 8-pin only, and three cables with combination 6- and 8-pin connectors. It is built to accommodate four video cards with either two 6-pin or one 8-pin PCI-E power connector.

Bundled with the PSU is a cord, user's manual, warranty card, a metal case badge and a keychain/bottle opener.

The cord is 14ga, the largest PSU cord I've seen yet. The connector is non-standard and very heavy duty. I'd say that Cooler Master wisely went with a non-standard connector to prevent a 16ga or 18ga cord from being used. I won't go into electronics theory to explain why bigger wires are better, just trust me, they are.

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