Result Analysis and
Discussion
Efficiency
115V
|
|
Load |
Pin(W) |
Pout(W) |
Efficiency |
| 20 % |
196.90 |
174.47 |
88.61 % |
| 50 % |
478.10 |
433.6 |
90.69 % |
| 100 % |
970.10 |
858.26 |
88.47 % |
The 80Plus Gold 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 and it mainly originates from the reason of lower losses in the AC
filtering stage and the PFC at 230V AC.
Output Stability
|
| Load |
Rail |
Loading(A) |
Output(V) |
|
20 % |
5V |
3.18 |
5.1 |
| 3.3V |
3.18 |
3.35 |
| 12V1 |
2.93 |
12.3 |
| 12V2 |
2.93 |
12.3 |
| 12V3 |
2.93 |
12.3 |
| 12V4 |
2.93 |
12.3 |
| 5VSB |
0.53 |
5.08 |
|
|
|
50 % |
5V |
7.96 |
5.1 |
| 3.3V |
7.96 |
3.34 |
| 12V1 |
7.3 |
12.2 |
| 12V2 |
7.3 |
12.2 |
| 12V3 |
7.3 |
12.2 |
| 12V4 |
7.3 |
12.2 |
| 5VSB |
1.32 |
5.04 |
|
|
|
100 % |
5V |
15.92 |
5.0 |
| 3.3V |
15.92 |
3.32 |
| 12V1 |
14.6 |
12.1 |
| 12V2 |
14.6 |
12.1 |
| 12V3 |
14.6 |
12.1 |
| 12V4 |
14.6 |
12.1 |
| 5VSB |
2.64 |
4.98 |
|
Noise |
|
Load |
|
| 20 % |
Noiseless |
| 50 % |
Audible |
| 100 % |
Noisy |
The Voltage Regulation
of this PSU is very good. It makes use of a DC-DC topology. This means, that the
HCP-850 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/Ripple |
|
Voltage |
Noise/Ripple Vpp |
| 5V |
0.035 |
| 12V |
0.04 |
| -12V |
0.032 |
| 3.3V |
0.028 |
| +5VSB |
0.021 |
The noise values are good. Only the 35mV at
5V are a bit high, but since the 5V ripple performance drastically improves with
just little less 5V load, we don't judge this as a negative
point.
Corsair RM650 Review 