EVGA SuperNOVA 550 GS Power Supply

REVIEW INFORMATION
SUPPLIED BY: EVGA
MANUFACTURER: EVGA
PRODUCT: SuperNOVA 550 GS
PROD LINK: EVGA’s Current Offerings
PRICE: $84.99 @ NewEgg
Price is at the time of testing!

We’re going to load test this in exactly the same way as we did big brother. One SM-268 will be used for loading, with the Rek RF9901 power meter, Extech DMM, Tektronix scope, and dual probe thermometer all helping out.

SuperNOVA 550 GS – STANDBY Load Tests
Test # +5VSB DC Watts/
AC Watts
Eff. P.F.
Load Tests
1 0.5A 2.55W/
3.26W
78.2% 0.340
5.10V
2 1.25A 6.34W/
8.18W
77.5% 0.453
5.07V
3 2.5A 12.6W/
16.5W
76.4% 0.513
5.03V

First, of course, we have the standby efficiency tests. All three results are above average, but what’s interesting to me is that this unit looks to be more efficient than the 650W was pretty much across the board.

Voltage regulation is improved as well at 1.4%.

SuperNOVA 550 GS – Cold Load Tests
Test # +3.3V +5V +12V DC Watts/
AC Watts
AC
Input
Eff. P.F. Intake/
Exhaust
Progressive Load Tests
1 1A 1A 3.1A 50.8W/
60.3W
116.8V 84.2% 0.979 30°C/
30°C*
3.35V 5.06V 12.14V
2 1A 1A 8A 112.6W/
125.8W
116.8V 89.5% 0.992 31°C/
31°C*
3.34V 5.05V 12.12V
3 3A 3A 20A 274.2W/
301.9W
116.4V 90.8% 0.994 32°C/
33°C**
3.30V 5.00V 12.04V
4 5A 5A 32A 435.5W/
489.7W
115.6V 88.9% 0.991 32°C/
39°C
3.27V 4.97V 11.94V
5 6A 7A 40A 543.3W/
623.2W
115.2V 87.2% 0.992 32°C/
40°C
3.24V 4.93V 11.87V
Crossload Tests
CL1 12A 12A 0A 103.6W/
124.6W
116.2V 83.1% 0.992 32°C/
40°C
3.29V 4.95V 12.12V
CL2 0A 0A 45A 539.5W/
613.9W
115.0V 87.9% 0.992 32°C/
40°C
3.26V 4.96V 11.88V

* Fanless operation.

On the 650W unit, I found that poor ATX connector contact played a small role in negatively impacting voltage regulation numbers. I found this to be the case here again today. Moving from left to right in the above table, my load regulation numbers are 3.3%, 2.6%, and 2.2%. That’s an average of 2.7%, which is down from the 650W version. I’m going to try and tighten up these pins a bit for the hot box, as that’s where I get my scoring numbers, but as this seems to be a running theme with these units I’m not sure it will help too much.

Meantime, let’s look at efficiency. This unit is certified Gold, and Gold is what it hits relatively easily. Even the 10% load level in test one comes up with a decent result, considering the fact that Gold units this small usually slide down the efficiency scale pretty dramatically below the 20% load level.

I did have the unit running in Eco mode for all testing, so the unit operated in fanless mode any place you see an asterisk in the above table. A double asterisk means the fan was twitching the entire time, but not getting enough juice to start spinning.

On to the next page, if you please.