Seasonic PRIME Ultra 1000 Titanium Power Supply

REVIEW INFORMATION
SUPPLIED BY: Seasonic USA
PRODUCT: PRIME Ultra 1000 Titanium
PROD LINK: PRIME Ultra Titanium Product Page
PRICE: $259.90 @ NewEgg
Price is at the time of testing!


PRIME Ultra 1000 Titanium – Overshoot Transient Tests
VSB On VSB to 67%, 12V Off to 67%, 12V

Oh, man… my own expectations weren’t low enough. We saw this before with the PRIME Platinum 850W… not only did the unit not handle the spikes as well as I’d like, it failed to come up to full power for the 12V testing. Instead, it chose to go into protective shutdown. These things are supposed to be able to hit full power from no power without shutting down, and this is now the second time I’ve seen the PRIME design fail to do so. And I couldn’t check the first sample, because it failed before getting to these tests.

I’m quite disappointed, frankly. No S&C point for this unit.

Let’s ramp up the hot box now. You take the motorbike, I’ll take the General Lee. Then, we’ll put the ramp away and get some actual work done.

PRIME Ultra 1000 Titanium – Hot Load Tests
Test # +3.3V +5V +12V DC Watts/
AC Watts
AC
Input
Eff. P.F. Intake/
Exhaust
Progressive Load Tests
1 1.08A 1.08A 7.47A 101.9W/
111.8W
116.1V 91.1% 0.975 30°C/
31°C*
3.328V 5.02V 12.20V
2 1.5A 1.5A 15.5A 206.5W/
222.0W
115.8V 93.0% 0.990 34°C/
38°C*
3.329V 5.02V 12.20V
3 3.5A 3.5A 38.5A 508.8W/
547.0W
114.9V 93.0% 0.993 37°C/
49°C
3.325V 5.02V 12.20V
4 5.5A 5.5A 58A 765.8W/
834.4W
113.7V 91.8% 0.995 40°C/
63°C
3.322V 5.01V 12.20V
5 7A 7A 77A 1014.9W/
1128W
112.5V 90.0% 0.997 44°C/
68°C
3.320V 5.01V 12.20V
Crossload Tests
CL1 15A 15A 0A 126.6W/
145.0W
116.0V 87.3% 0.984 32°C/
40°C
3.318V 5.01V 12.22V
CL2 0A 0A 83A 1017.5W/
1124W
113.6V 90.5% 0.997 43°C/
69°C
3.332V 5.02V 12.20V

* Fanless operation.

Heh – nothing like a good old session of mythic regulation to take the sting out of the power on spike performance. Now, we have 0.27%, 0.20%, and 0.00% regulation. The 12V rail just did not move. It took a heavy 3.3V/5V crossload just to get it to move. 0.16% for the average, which is crazy to me. Ten times that number would still get us nearly into the excellent range… that’s how far Seasonic and their competitors have brought us now.

Fan wise, it didn’t stay off as long this time. It was running as soon as test three hit. And I still couldn’t hear much of it.

Efficiency did slip just a bit at some load levels, but not out of Titanium. It got mighty close to losing my one point grace on test three, but not quite.

How about we find out what the ripple looks like?

PRIME Ultra 1000 Titanium – Oscilloscope
Test # +3.3V +5V +12V
1
2
3
4
5
CL1
CL2

8mV for the minor rails, 16mV for the 12V rail. Looks like a win, to me. The first unit did 6mV, 6mV, and 14mV… even lower.

But we can’t score the unit that died, so we’ll stick with the second unit. Not that it matters… both cleared the excellence hurdle.