Corsair HX850 V2 Power Supply Review
Simulated Load Results (Tables)
If you've seen the simplified graphs over on the previous page you will undoubtedly already have a good idea of how the HX850 performs. However, certain results from the test can be too difficult to incorporate into the existing graphs, and for this reason all of the result data is also provided in the table format below.
All testing is conducting using OC3D's trusty SunMoon SM-268+ DC load tester. This equipment is capable of placing a user specified load on all of the PSU's rails (+3.3v, +5v, +12v, -12v, +5vSB) up to a maximum load of 1680w. As the maximum load for this device on the +12v rail is restricted to 75A we can also call on additional help from our Analogic Series 2000 DC load tester, so that anything up to an additional 166A can be added if necessary.
As usual, all testing is conducted at 50°C (±5%) with the results being recorded using a Fluke Multimeter and Thermostat.
|Corsair HX850 @ 50c|
|+3.3v||+5.0v||+12v||+5vSB||-12v|| AC Watts /|
|Efficiency|| Intake /|
|93.27%|| 50.2°C /|
|91.61%|| 51.2°C /|
To reiterate what has already been said over on the previous page, the HX850 manages excellent voltage stability on all rails across all loads. The highlight of the testing however has to be the fact that the HX850 was able to pump out a huge 1081w, 231w more power than what was written on the box.
You may also wonder about the validity of the delta temperatures shown above. Well let me tell you right now that this PSU is so efficient that it was almost impossible to take a snapshot of in/out temperature readings where the unit was actually contributing anything to the 50c hot box temperature. Furthermore, when the PSU was operated outside of the hot box, the fan didn't spin up in the first instance until the load had reached 850w! On subsequent tests once the unit had warmed up a bit more, it did kick in at lower load levels, but appeared to be entirely based on temperature rather than load.
|Corsair HX850 Scope Results @ 50c|
For the last part of the testing I analysed the ripple on the +3.3, +5 and +12v rails using a Rigol 25Mhz 400MSa/s oscilloscope. All readings were taken while the HX850W was installed inside the 50°C hot box to provide us with worst case scenario results.
The ripple suppression on Corsair PSU's has always been good, so good that there really isn't much between this HX850 V1 & the V2. The only way to distinguish between the two is the ripple on the +3.3v and +5.0v rails on the newer model is slightly better, but the older model actually wins on the +12v rail tests by 8.0mV on the 100% load and 12.0mV on the max load tests. Ripple suppression can be effected when pushing for that extra efficiency rating but these results are still so below the 120mV ATX standard that its far from anything to worry about.
Now lets move on to the conclusion and for TTL's Video.