Our load tests utilize a couple of FAST ATE active load testers and a variety of other equipment such as an oscilloscope, power conditioner, temperature probe and a power consumption meter. You can read more about our standard testing approach here.
The tests performed are based around six conceivable setups that are out there and progressively load down the PSU up to the power supply's limits or 1000W, whichever comes first. Since our test equipment's limits are higher than that of the Cooler Master V850 850W power supply, we can test it to the maximum.
The above tests represent typical loads that we have measured from various systems and are meant to give a rough idea of where your computer might fall in line with our tests. Please keep in mind that each system is different and actual loads can vary greatly even with similar hardware.
Let's start by taking a look at the voltages to see how well this unit did during testing. Starting with the 12V rail, we see 2% regulation from start to finish with a total drop of .09V. The 5V rail managed to stay within 2% of specification with a total drop of .06V from start to finish. Moving towards the 3.3V rail, we see that regulation was within 2% of specification with a total voltage drop of .03V.
DC Output quality for the Cooler Master V850 was good and well within specifications. During Test 1, we saw 13mV of noise on our scope. When we increased the loads in Test 3, the ripple climbed to 24mV at a little over half load. During Test 5 under a load of 850W, the oscilloscope showed a maximum of 36mV on noise on the 12V rail.
The Cooler Master V850 power supply is rated for 80 PLUS Gold efficiency. This means that the power supply must perform at 87%/89%/87% efficiency at 20%/50%/100% loads respectively. As you can see, V850 passed on our bench, and wasn't close to failing at any point.
Cooler Master's introduction of the V series power supplies was great to see, especially since it was a complete refresh in the flagship series of power supplies. As the V1000 was such a great unit all the way around in features, performance and price, we had the same expectations for the V850 that we have taken a look at today.
The V850 sports all of the same features and the performance is very close to that of the V1000 in Voltage regulation, DC output quality and efficiency, which is great to see. Unfortunately, the pricing of the V850 puts it in a bit of an awkward position on the market, especially considering what you can pick up the V1000 for right now. While the V850 has an MSRP of $189.99, you can pick it up for about $160 off of Newegg. The V1000 on the other hand has a higher MSRP, but can currently be had for $150 after a mail in rebate from Newegg as well.
It simply doesn't make any sense to spend more money and get less power with the same features from the same series of PSU.
Once the prices settle in a bit from the power supply still being somewhat fresh to the market, it may make a lot more sense to pick up the V850. Until then, the V1000 will remain a better option.