EVGA SuperNOVA 850 T2 850W Power Supply

REVIEW INFORMATION
SUPPLIED BY: EVGA
MANUFACTURER: EVGA
PRODUCT: SuperNOVA 850 T2
PROD LINK: 850 T2 Product Page
PRICE: $239.99 @ NewEgg & EVGA
Price is at the time of testing!


SuperNOVA 850 T2 – Overshoot Transient Tests
VSB On VSB to 100%, 12V Off to 100%, 12V
O-Scope Shot O-Scope Shot O-Scope Shot

Of course, we’ll take a quick peek at these power on spike tests first. But “quick” is definitely the right word, because like big brother this unit is nigh flawless here. No issues at all.

Time to heat things up. Fifty degrees, here we come! I’ll put an ultra bright flashlight in the hot box too, so I can see when the fan comes on a little better. It’s not easy with some of these things.

SuperNOVA 850 T2 – Hot Load Tests
Test # +3.3V +5V +12V DC Watts/
AC Watts
AC
Input
Eff. P.F. Intake/
Exhaust
Progressive Load Tests
1 1.1A 1.1A 6.2A 85.6W/
94.8W
117.5V 90.3% 0.946 28°C/
27°C*
3.30V 5.04V 12.16V
2 1.5A 1.5A 13A 178.1W/
191.9W
118.8V 92.8% 0.982 32°C/
33°C*
3.30V 5.04V 12.16V
3 3.25A 3.25A 32.5A 430.2W/
458.4W
117.1V 93.9% 0.996 39°C/
42°C*
3.28V 5.02V 12.14V
4 5A 5A 52A 684.1W/
737.3W
117.0V 92.8% 0.997 46°C/
55°C
3.27V 5.01V 12.12V
5 6.5A 6.5A 65A 855.8W/
932.4W
116.0V 91.8% 0.998 51°C/
61°C
3.26V 5.00V 12.11V
Crossload Tests
CL1 12A 12A 0A 102.7W/
117.1W
117.8V 87.7% 0.966 35°C/
43°C
3.27V 5.02V 12.18V
CL2 0A 0A 70.8A 860.8W/
931.2W
117.1V 92.4% 0.998 47°C/
56°C
3.28V 5.02V 12.11V

* Fanless operation.

This time, the fan came on sooner. A little sooner. It waited the whole ten minutes each of tests one, two, and three… 30 minutes total. Then it thought about it long and hard and finally came on in test four. After six minutes and thirty seconds of deliberation. Wow. The internal hot box temperature was forty-five degrees by then. Does that impress you? It sure as heck impresses me. The fan then stayed running until the very end of CL1, briefly shut off, and then fired up again for test CL2. But that’s not something I’ll hold against it… after all, test five saw the temperature hit fifty-one degrees. And yet the unit ran fine with no complaints.

Efficiency once again is a pass for Titanium, but I would like to point out that test five still saw efficiency hovering around the 92% mark. It is more efficient at full power than any other Titanium I have tested. The 1kW model takes second place, with all other Titaniums seemingly content to stay around the bare minimum 90% mark at full power. The only way I could be more impressed is if test one had also hit 92%. But that’s asking a whole lot from current technology, so I’m content with what I see up there right now.

Even so, I wonder what full power efficiency would look like on the 750W unit. Is the 850W model the efficiency sweet spot of the entire line? I don’t know… I’ve heard nothing about the 750W model coming my way, so we may be sitting in the dark there for a while.

Sadly, I cannot report that this unit tightened up and hit that mythic level regulation in the hot box. It actually slipped a little bit. I now have 1.2% on the 3.3V, 0.8% on the 5V, and 0.4% on the 12V rail. The better performance on the 12V side of things is somewhat balanced out by the slippage on the 3.3V rail. Our average this time is 0.80%. Still excellent, so we won’t complain too hard, but it’s looking like you’ll want the 1kW model if tight regulation is your thing. That bad boy came a bit closer to mythic than this one did.

Let’s see what the ripple looks like.

SuperNOVA 850 T2 – Oscilloscope Tests
Test # +3.3V +5V +12V
1 O-Scope Shot O-Scope Shot O-Scope Shot
2 O-Scope Shot O-Scope Shot O-Scope Shot
3 O-Scope Shot O-Scope Shot O-Scope Shot
4 O-Scope Shot O-Scope Shot O-Scope Shot
5 O-Scope Shot O-Scope Shot O-Scope Shot
CL1 O-Scope Shot O-Scope Shot O-Scope Shot
CL2 O-Scope Shot O-Scope Shot O-Scope Shot

Looks like money, to me. I’ve got about 8-10mV on the 3.3V rail, 12mV on the 5V rail, and 8mV on the 12V rail. All better than excellent. There might be room for a “mythic” scoring bracket here, as well.

That said, while I have thought about tightening up the score on the ripple side of things since I made the changes to the voltage regulation scoring, I do have a problem with making that change here. First, I don’t want to encourage widespread adoption of those in cable capacitors, even though I don’t currently score against them. Your ripple suppression should be completely done within the power supply housing if you ask me.

Second, and most importantly, it would dramatically impact the performance score for many, many units that can’t manage… say… 12.5mV on all three main rails. That would be the logical place to put it because it’s half the number I require for excellence. You might see the next Seasonic lose a point and a half, for example, if it could only do 15mV or better without those in cable capacitors. I have a big problem with that because my 25mV excellent bracket is already hard to hit and way below the ATX specification.

No, the ripple score is not getting a mythic bracket anytime soon. I have to see these results without in cable capacitors far more often than I have been. Only the really high-end OEMs seem able to do it consistently. The industry as a whole just isn’t there yet.

Enough rambling. Let’s take this thing apart.