Seasonic Platinum Series SS-1050W XP3 Review

Published by Marc Büchel on 16.09.14
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Result Analysis and Discussion


Efficiency

Load Pin(W) Pout(W) Efficiency
20 % 191.13 173.96 91.02 %
50 % 472.77 435.46 92.11 %
100 % 968.92 870.93 89.89 %


The 80Plus Platinum certification requirements (87% - 90% - 87%) are surpassed especially at 20% Load. The full Load efficiency is a bit higher at 230V AC. This is the case with most of todays PSU's an it mainly originates from the reason of lower losses in the AC filtering stage and the PFC at 230V AC. The 230V AC 100% Load efficiency is 90.68%.

Output Stability

Load Rail Loading(A) Output(V)
20 % 5V 4.17 5.09
3.3V 4.17 3.35
12V 14.6 12.11
 
50 % 5V 10.47 5.11
3.3V 10.47 3.38
12V 36.5 12.12
 
100 % 5V 20.95 5.08
3.3V 20.95 3.39
12V 72.98 11.98


The Voltage Regulation of this PSU is very good. It makes use of a DC-DC topology. This means, that the SS-1050XP3 is mainly a 12V PSU and then generates its 5 and 3.3V from 12V. This is a modern approach, and since the Load is mainly on 12V it makes a lot of sense. For almost any PSU which makes use of this topology crossload tests do not present a problem.

Noise
Load  
20 % Noiseless
50 % well audible


If we listen closer with the power supply, we don't here anything at 20 percent load. The SS-1050XP3 is a semi passive power supply and the fan kicks in, when 35 percent load is reached. It keeps spinning until the load goes below 25 percent. This ensures adequate internal temperatures under all circumstances. When demanding 50 percent load from this unit, the noise level can be described as silent and when there is 100 percent load, the unit is well audible.

Noise/Ripple
Voltage Noise/Ripple Vpp
3.3V 0.020
5V 0.013
12V 0.028


The noise values are good. Only the 28mV at 12V are a bit high, but since the 12V ripple performance drastically improves with just little less 12V load, we don't judge this as a negative point.



Page 1 - Introduction
Page 2 - Preview
Page 3 - Delivery / Specs
Page 4 - A Look Inside
Page 5 - Result Analysis and Discussion
Page 6 - Conclusion




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Seasonic Platinum Series SS-1050W XP3 Review - PSUs - Reviews - ocaholic