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 lower than that of the Corsair TX850V2, we can test it to the maximum.
After running the TX850V2 through all of our tests, we were quite pleased with the results. As you can see in the chart above, everything is well within specifications. While the voltage regulation isn't the most spectacular that we have seen, all three rails managed to stay within 2% of their specified values. In fact, they weren't that far off from being within 1% as the worst deviation from the ATX specifications was 1.4% on both the 5V and 12V rails, with the 3.3V rail being the best at 1.2%.
Out of all the tests ran on the Corsair TX850V2, the ripple seen on the 12V rail is the most impressive. Starting out, it was hard to even see the noise on the oscilloscope during the first test. As you would expect, the ripple seen grew as the loads were increased on the TX850V2, but the changes were small. Even under full load, the power supply reaches a maximum of 22mV peak to peak of noise on the 12V rail.
Aside from the improved quality of the DC outputs, perhaps the best area of improvement in the TX850V2 over its predecessor is the improved efficiency of the unit. While the TX850V2 does very well in the first four tests, it starts cutting it a little close towards failing to achieve the 80Plus Bronze rating during test five. Out of all the changes that Corsair made, we would have liked to have seen a little more improvement in the efficiency department. Normally it wouldn't be such a big deal, but the TX850V2 just got an overhaul and these days are all about going green and being eco-friendly. Corsair offers several 80Plus Silver rated units and even managed to get the recently reviewed AX1200 to 80Plus Gold. Nevertheless, it still passes as it achieves its claimed rating, but it would have been nice to see at least a Silver rating out of the overhaul.
Corsair has done a great job with the TX850V2. They took all of the good of the original TX850W and made most of the improvements needed to produce another rock solid power supply. While the TX850V2 produces solid numbers for voltages, noise, and efficiency, they aren't the best we have seen out of an 850W power supply. One must keep in mind, though, that this is not a power supply designed to be the Holy Mecca of the 800W-900W ranged power supplies, but something for the masses that will provide solid, stable power for years to come even under extended periods at full load.
Overall, the updates made to the Corsair TX850V2 were great. However, there are a few areas that we would have liked to see the TX850V2 improve on. Efficiency is certainly the area that we would have liked to see a larger change, but the unit does perform just as it is rated. We also wish that the connector availability had changed just a little bit. You will be very hard pressed to find a new system with any Molex or FDD connectors in it these days, and even most older systems that you are putting a replacement power supply in will only have a handful of Molex connectors and maybe a single FDD connector. It would have been nice to see a few more SATA connections and perhaps a second ATX 4+4 connector instead.
With all of that being said, the Corsair TX850V2 delivers where it matters most and that is in the area of voltages and regulation. Corsair adds some icing to the cake with the sweet $119 price tag, making the TX850V2 hard to beat unless you are looking for a power supply with better efficiency.