Corsair HX850 V2 Power Supply Review

Simulated Load Results (Table)

Corsair PSU new

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 /
 DC Watts
 Efficiency Intake /
 Exhaust
Δ Temp
Test1
(25%)
4.50A4.50A14.25A0.75A 0.20A236w /
216w
91.52%49.6°C /
49.7°C
0.1°C
3.34v5.05v12.08v5.05v -11.56v
Test2
(50%)
9.00A9.00A28.50A1.50A 0.40A

461w /
430w

93.27% 50.2°C /
50.2°C
0.0°C
3.32v5.02v12.04v5.02v -11.54v
Test3
(75%)
13.50A13.50A42.75A2.25A 0.60A688w /
642w
 93.31%50.5C /
50.5°C
0.0°C
3.30v5.00v11.98v4.99v-11.53v
Test4
(100%)
18.00A18.00A57.00A3.00A0.80A930w /
852w
91.61% 51.2°C /
52.6°C
2.4°C
3.27v4.97v11.92v4.95v-11.54v
TestX1
(x-load)
18.00A18.00A1.00A0.00A0.00A192w /
162w
84.37%50.7°C /
50.7°C
0.0°C
3.32v5.01v12.08v5.05v-11.81v
TestX2
(x-load)
 1.00A 1.00A 70.50A0.00A 0.00A917w /
848w
92.47%51.6°C /
58.2°C
6.6°C
3.32v5.03v11.92v5.04v-12.10v
TMax1
(Max)
 20.00A20.00A74.00A5.00A1.00A1199w /
1081w
90.15%50.1°C /
58.8°C
 8.7°C
3.25v4.95v11.80v4.89v-11.60v


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
  +3.3v +5.0v +12v
Test1
(25%)
Corsair PSU newCorsair PSU newCorsair PSU new
Test2
(50%)
Corsair PSU newCorsair PSU newCorsair PSU new
Test3
(75%)
Corsair PSU newCorsair PSU newCorsair PSU new
Test4
(100%)
Corsair PSU newCorsair PSU newCorsair PSU new
TestX1
(x-load)
Corsair PSU newCorsair PSU newCorsair PSU new
TestX2
(x-load)
Corsair PSU newCorsair PSU newCorsair PSU new
TMax1
(MAX)
Corsair PSU newCorsair PSU newCorsair PSU new

 

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.

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Most Recent Comments

01-08-2012, 09:32:43

tinytomlogan
http://www.overclock3d.net/gfx/artic...034458108l.jpg

Corsair are back with a revamp on the HX850 PSU. Will it be a huge leap forward like the original? Its time to test and find out.

Continue Reading

02-08-2012, 02:46:44

Ulijin
Quote:
Originally Posted by tinytomlogan View Post
we still have not found a use for the velvet bag once you have actually fitted your PSU....
1. Give it to your missus as a jewelery bag

2. Cut 3 holes in the back of it for your little dog / cat's legs and tail and fasten. Now you've got an instant diaper to stop the little bastard crapping all over your house

3. Use it to store the stock fans that arrived with all your PC components that you can't bring yourself to throw away.

4. Use it to store component instructions (I actually do use my one for this)

5. Use it to store random lists.... of which this really is one

02-08-2012, 07:01:08

wassupdoc
Quote:
Originally Posted by Ulijin View Post
1. Give it to your missus as a jewelery bag

2. Cut 3 holes in the back of it for your little dog / cat's legs and tail and fasten. Now you've got an instant diaper to stop the little bastard crapping all over your house

3. Use it to store the stock fans that arrived with all your PC components that you can't bring yourself to throw away.

4. Use it to store component instructions (I actually do use my one for this)

5. Use it to store random lists.... of which this really is one

haha

02-08-2012, 11:39:46

airdeano
Tom's video and James' written has nailed it again, awesome job team OC3D!

other than the colored wires under the cable braid.. it's a Corsair PSU with strength, stamina,
and style.

gaining a pretty good collection of velour PSU bags and felt Crown Royal bags.. myself

airdeano

06-08-2012, 09:21:03

kilobravo
There`s some new competition,but Corsair is still up there.
Can hardly wait for the AX1200i review.

06-08-2012, 09:32:07

tinytomlogan
Quote:
Originally Posted by kilobravo View Post
There`s some new competition,but Corsair is still up there.
Can hardly wait for the AX1200i review.
Jim has been really ill recently so we will get it up as soon as he is well enough to test it dude

06-08-2012, 09:52:36

Mister B
This is such a sickener. I bought my HX 850 only two months ago. And then they revamp it :/

06-08-2012, 09:54:23

Josh Weston
Ah, it's always the way.
You do still have a great PSU though, so it's not the end of the world.
Also; welcome to the forums

06-08-2012, 09:56:21

Mister B
That is true I wonder how much reworking was actually put in to push it up to 80+ gold?

And thank you! I have been reading threads here for years so I said I might as well register

06-08-2012, 10:14:35

kilobravo
Quote:
Originally Posted by tinytomlogan View Post
Jim has been really ill recently so we will get it up as soon as he is well enough to test it dude
Hope its nothing to serious.
Best thoughts to Jim.

20-08-2012, 15:50:30

shadow
I hope Jim has a speedy recovery.

08-10-2012, 15:14:39

kejser11
Nice review, as always! When can we expect a testing of Corsairs first platinum-rated PSU, the AX 1200i? really eager to see it put through its paces!!
Reply
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