Seasonic G-450 Review

Load Testing

Test 1 (73.59W Load)

Rail Load Voltage Ripple
12V 2.2A 12.16V 8.6mV
5V 5.05A 5.05V 5.2mV
3.3V 4.93A 3.35V 3.2mV
-12V 0.1A -11.48V 6.6mV
5Vsb 0.5A 5.02V 5.0mV
AC Power 84.3W
Efficiency 85.86%
Power Factor 0.93
Intake Temp 27°C
Exhaust Temp 28°C

.

Test 2 (160.3W Load)

Rail Load Voltage Ripple
12V 9.2A 12.16V 11.0mV
5V 5.06A 5.05V 5.2mV
3.3V 4.93A 3.35V 3.0mV
-12V 0.1A -11.64V 6.8mV
5Vsb 1.0A 5.01V 6.4mV
AC Power 180.2W
Efficiency 88.81%
Power Factor 0.96
Intake Temp 28°C
Exhaust Temp 30°C

 

Test 3 (202.24W Load)

Rail Load Voltage Ripple
12V 9.2A 12.14V 12.6mV
5V 10.06A 5.03V 5.8mV
3.3V 10.12A 3.34V 3.8mV
-12V 0.1A -11.73V 6.6mV
5Vsb 1.0A 5.0V 7.0mV
AC Power 220.6W
Efficiency 91.68%
Power Factor 0.96
Intake Temp 28°C
Exhaust Temp 30°C

.

Test 4 (257.81W Load)

Rail Load Voltage Ripple
12V 13.8A 12.12V 15.4mV
5V 10.06A 5.03V 5.8mV
3.3V 10.12A 3.34V 4.0mV
-12V 0.1A -11.86V 8.2mV
5Vsb 1.0A 4.99V 8.2mV
AC Power 283.1W
Efficiency 91.07%
Power Factor 0.98
Intake Temp 28°C
Exhaust Temp 31°C

.

Test 5 (313.2W Load)

Rail Load Voltage Ripple
12V 18.4A 12.11V 18.0mV
5V 10.06A 5.03V 6.2mV
3.3V 10.09A 3.33V 4.2mV
-12V 0.1A -11.98V 8.8mV
5Vsb 1.0A 4.99V 9.4mV
AC Power 344.4W
Efficiency 90.94%
Power Factor 0.98
Intake Temp 30°C
Exhaust Temp 33°C

.

Test 6 (371.13W Load)

Rail Load Voltage Ripple
12V 23.2A 12.1V 19.4mV
5V 10.06A 5.03V 6.2mV
3.3V 10.09A 3.33V 4.2mV
-12V 0.1A 12.11V 10.4mV
5Vsb 1.0A 4.99V 9.6mV
AC Power 408.5W
Efficiency 90.85%
Power Factor 0.97
Intake Temp 30°C
Exhaust Temp 33°C

.

Test 7 (403.35W Load)

Rail Load Voltage Ripple
12V 25.4A 12.09V 21.4mV
5V 10.04A 5.02V 7.2mV
3.3V 10.09A 3.33V 5.0mV
-12V 0.2A -11.96V 14.8mV
5Vsb 1.99A 4.97V 12.2mV
AC Power 446.2W
Efficiency 90.40%
Power Factor 0.98
Intake Temp 31°C
Exhaust Temp 33°C

.

Test 8 (461.29W Load)

Rail Load Voltage Ripple
12V 29.9A 12.09V 26.4mV
5V 10.04A 5.02V 9.8mV
3.3V 10.09A 3.33V 10.0mV
-12V 0.3A -11.9V 19.6mV
5Vsb 2.48A 4.95V 13.2mV
AC Power 513.7W
Efficiency 89.80%
Power Factor 0.99
Intake Temp 32°C
Exhaust Temp 35°C

.

Overload Test (543.69W Load)

Rail Load Voltage Ripple
12V 36.8A 12.07V 30.2mV
5V 10.02A 5.01V 12.0mV
3.3V 10.06A 3.32V 11.0mV
-12V 0.3A -12.1V 48.2mV
5Vsb 2.48A 4.95V 15.4mV
AC Power 609.5W
Efficiency 89.20%
Power Factor 0.99
Intake Temp 32°C
Exhaust Temp 37°C

.

The 12V rail started at 12.16V, and dropped to 12.09V at full load. This equates to 0.16V, or 1.33% regulation, and a 0.07V, or 0.58% drop. On the 5V, we had 5.05V during Test 1 and 5.02V as full load, which equates to 1% regulation and a 0.6% drop. Last but not least, we had 3.35V on the 3.3V rail during Test 1 and 3.33V at full load. This works out to be 1.5% regulation and a 0.6% drop. Averaged out, we have 1.28% regulation, and 0.59% variation. This is an excellent result – one of the best we have ever seen here.

The efficiency was also good, although the In Win IP-S400GQ3-2 was actually  better in this respect under light loads, starting at almost 91% at 74W Load, vs just under 86% for the G-450. However, this is a lower load than the 80plus certification requires testing at, and it jumped up very quickly during the next  tests. At higher loads, this power supply is actually more efficient than the In Win.

The unit ran fairly cool during the testing, and we only saw a 3°C Delta between the intake and exhaust temperature at most. I was able to overload the unit to just over 540W. The drops in voltages were only small during this test, the efficiency was still above 89% and the unit’s exhaust temperature only went up by 2°, which indicates that the unit wasn’t having too much difficulty handling it.

Rail Test 8 (461.29W) Overload Test (543.69W)
12V  g450-test8-12v  g450-OL-12v
5V  g450-test8-5v  g450-OL-5v
3.3V  g450-test8-3.3v  g450-OL-3.3v
-12V  g450-test8--12v  g450-OL--12v
5Vsb g450-test8-5vsb  g450-OL-5vsb

.

The ripple suppression was also excellent. Until the overload test, none of the rails even went above a quarter of the maximum allowable limits, and the 5V and 3.3V rails had single digit ripple figures for the most part. This is a lot better than we saw with the SSP-350GT.

Pages: 1 2 3 4