Cooler Master Silent Pro 700W

Results

We can't fault the outputs from the Silent Pro - we've got an a set of all green readings. The 5V readings drop a touch as the load increases and at 80 percent of full load on the 5V rail it drops to 4.76V. The 3.3V is pretty solid from top to bottom, as was the single 12V rail until we really worked it at its full 600W limit then it started to drop a touch.

The efficiency also followed suit at dipped to "just" ~83 percent. That in itself is certainly excellent, but with our other readings of 85+ percent it pales a bit in comparison. It's not quite as efficient as the Be Quiet we reviewed recently, but it's still certainly very good.

Throughout, the Cooler Master Silent Pro did live up close to its name, although it wasn't perfectly inaudible like the Be Quiet Dark Power Pro was. It is certainly one of the quietest we've heard (or rather, not) in a while but there was just a touch of fan whirr throughout the testing, even when we left it at full load for an extended period to burn in a little.

At 50-75 percent load the power supply was cool to touch and pushed out cool air, although with nothing to redirect the flow down into the components there's certainly a bit of air just venting straight out the back. During the two 100 percent load tests though the sides were warm-hot and the air coming out the back was noticeably warmer but certainly not hot. Given the combined facts that the 5V and 12V drop quite suddenly as it hits full load, the efficiency drops in 3.3V and 5V weighting and the temperature increases quite sharply, we'd strongly suggest there's very little overhead spare on the Silent Pro 700W.