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Cooler Master iGreen Power 600W

Looking at the packaging for this Cooler Master power supply, the emphasis is on the 85 per cent efficiency (hence the Green Power name), the super silent operation and the SLI and Crossfire readiness. Cooler Master even quotes the power available to the 12V rails. This really is all the information you really want to know about a power supply, so you have to commend Cooler Master for doing this.

The power supply uses a 120mm fan, so naturally it is pretty quiet. Strangely though, during testing we found a noise coming from the power supply that we couldn’t attribute to anything in particularly but it was fairly irritating.

Possibly due to the units high efficiency, it didn’t get very hot at all and the air was almost the same temperature going out as it was coming in.

All of the cables are braided and the five molex connectors are quick release for easily removing them from hard drives. Although there are only five molex connectors, there are six S-ATA connectors, obviously trying to move towards the trend of the modern machine. There are two PCI-E connectors for SLI and Crossfire.

There are three 12V rails rated at 16,14 and 8A respectively. CoolerMaster also include the peak outputs of 19.5A, 19.5A and 19A, which is useful to know. The PCI-E connectors come off the first and third rails which is a good design so the power is spread evenly. However, the third rail is only 8A which is a little on the low side for stable dual-card support and would definetely not work with CrossFire.

During testing, voltages stayed consistently within specification. Most notably, efficiency was excellent – virtually meeting the 85 per cent rated efficiency. When overclocking, 12V1 cut out at 21.5A which is pretty much sticking to the ATX12V specification.

This is a really good power supply, with well distributed rails (although perhaps a little on the low side for 12V3) and excellent efficiency. I really admire the approach of putting the most useful information on the box and even putting both continuous and peak figures on the power supply. At £92.83 it’s a pretty reasonable price and I’d definitely recommend it, as long as you weren’t looking at going Crossfire.

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