And now for the part you've been waiting for - the load testing of the moment.
Will this unit survive or go up in smoke... my SM-268 is its opponent.
The 268 will load down the unit, you see, in a simple series of tests.
I sure hope I don't find as the Diablotek strains that we're needing bulletproof vests.
Now the SunMoon itself is the main part of the testing, but it won't go it alone.
A USB Instruments oscilloscope will be watching the outputs as the PSU starts to moan.
The power draw at the wall outlet will also be part of the mix,
Even as a dual probe thermometer will get us our temperature fix.
Many times before I have explained right here just what all these tests entail.
But this time, I think I'm anxious to see just how fast this monster will fail.
If you would like to know the workings of these tests, then I think that I will just...
Point you toward last week's Topower review to help you brush off the rust.
Results from Diablotek RPM-1050 COLD load tests
Test #
+3.3V
+5V
+12V
DC Watts/
AC Watts
Eff.
Intake/
Exhaust
Simulated system load tests
Test
1
2A
2A
16A
214W/
260W
82.3%
22°C/
25°C
3.38V
5.08V
11.99V
Test
2
4A
4A
31A
408W/
507W
80.5%
22°C/
31°C
3.35V
5.05V
11.84V
Test
3
6A
6A
46A
596W/
756W
78.8%
24°C/
41°C
3.31V
5.02V
11.66V
Test
4
8A
8A
62A
FAIL
N/A
FAIL
3.06V
4.20V
9.47V
Test
5
11A
12A
78A
FAIL
N/A
FAIL
FAIL
FAIL
FAIL
Test
CL1
18A
18A
2A
FAIL
N/A
FAIL
FAIL
FAIL
FAIL
Test
CL2
1A
1A
78A
FAIL
N/A
FAIL
FAIL
FAIL
FAIL
Now the cold tests are over and shown in the chart, and we can compare the result.
This power supply, it is plain to see, is overrated to a fault.
Until test three it worked just fine and the voltages were more or less stable.
But then when I pushed the button for T4, stability became a pure fable.
3.3, 5 volts, and 12 volts went down... way out of the ATX spec.
12V in fact, went so far down, it plummeted right into heck.
Before test four, the unit surprised... the minor rails were quite stocky.
But even then, in the first three tests, the 12V was clearly rocky.
Test four was short lived, I'm sorry to say, because my fears came true.
The unit shut down after less than a minute - I'm not surprised... are you?
I tried to get the thing started again... I prodded, I wheedled, I pleaded.
It just wouldn't run - no sir, no way - a gentler approach was needed.
For you see, it's plain to me what these cold tests now have told us.
This unit can only do six hundred or so watts of power... no mas, no mas!
And look up there at the efficiency numbers... have you ever seen such a sight?
Below 80% by test three already - I'm not really feeling delight.
So far it's looking like this, to me, is an overspec'd 500 watt unit.
It does pretty well below that number, but above that you're gonna lose it.
It is well that the unit shut down in order to protect its meager guts.
I really don't think this unit will last in the hot box when I really go nuts.
Results from Diablotek RPM-1050 low load test
Load
Level
+3.3V
+5V
+12V
5VSB
-12V
DC Watts/
AC Watts
Eff.
9.3%
1A
1A
7A
0.5A
0.2A
98W/
120W
81.7%
3.39V
5.10V
12.08V
5.16V
-11.98V
But things are looking better here, with the results of the low load test.
Efficiency is actually good on this unit, with a 98W load on its chest.
It's just too bad the results obtained here are pretty much not valid.
Of course it's efficient here, my dears, it's overrated - not steak, but salad.
Overshoot Transient Testing - Diablotek RPM-1050
VSB On
VSB to Full, 12V
Off to Full, 12V
FAIL
FAIL
Even more amusing are these transient tests, where I look for power on spikes.
This unit passed the very first test, but the final two... it doesn't likes.
For the very first test is easy to pass - where I'm only testing standby.
Most units big or small will pass, as the standby rarely does fry.
Unfortunately though, this unit can't pass the final two of these.
The unit must run to full power you see, and here it just fell on its knees.
In the cold tests we maybe got up to a solid six hundred watts.
But asking this unit for a thousand? Well, it just couldn't connect the dots.
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