Load Regulation, Hold-Up Time & Inrush Current
To learn more about our PSU tests and methodology, please check out How We Test Power Supply Units.
Primary Rails And 5VSB Load Regulation
Load Regulation testing is detailed here.
Our hold-up time tests are described in detail here.
The hold-up time we measure is longer than 17ms, while the power-good signal is accurate.
For details on our inrush current testing, please click here.
The inrush current is at normal levels with both voltage inputs.
Load Regulation And Efficiency Measurements
The first set of tests reveals the stability of the voltage rails and the SSR-1000TR’s efficiency. The applied load equals (approximately) 10 to 110 percent of the PSU's maximum load in increments of 10 percentage points.
We conducted two additional tests. During the first, we stressed the two minor rails (5V and 3.3V) with a high load, while the load at +12V was only 0.1A. This test reveals whether a PSU is compatible with Intel's C6/C7 sleep states or not. In the second test, we determined the maximum load the +12V rail could handle with minimal load on the minor rails.
|Test #||12V||5V||3.3V||5VSB||DC/AC (Watts)||Efficiency||Fan Speed||PSU Noise||Temps (In/Out)||PF/AC Volts|
|1||6.408A||1.995A||1.980A||1.001A||99.847||91.856%||395 RPM||10.5 dB(A)||38.63°C||0.975|
|2||13.832A||2.985A||2.975A||1.201A||199.715||93.543%||395 RPM||10.5 dB(A)||39.27°C||0.989|
|3||21.615A||3.487A||3.487A||1.401A||299.899||93.945%||395 RPM||10.5 dB(A)||39.54°C||0.995|
|4||29.382A||3.991A||3.970A||1.605A||399.743||93.518%||435 RPM||10.7 dB(A)||39.82°C||0.995|
|5||36.813A||4.983A||4.964A||1.806A||499.636||92.971%||310 RPM||9.4 dB(A)||40.53°C||0.994|
|6||44.250A||5.985A||5.961A||2.010A||599.618||92.354%||430 RPM||10.8 dB(A)||41.83°C||0.994|
|7||51.682A||6.992A||6.961A||2.210A||699.566||91.687%||525 RPM||13.8 dB(A)||42.08°C||0.995|
|8||59.117A||7.991A||7.960A||2.416A||799.455||90.960%||625 RPM||19.5 dB(A)||43.20°C||0.996|
|9||66.981A||8.488A||8.479A||2.416A||899.412||90.196%||1005 RPM||32.0 dB(A)||44.10°C||0.997|
|10||74.610A||9.001A||8.968A||3.030A||999.381||89.252%||1525 RPM||42.8 dB(A)||45.00°C||0.997|
|11||82.811A||9.005A||8.966A||3.031A||1099.178||88.448%||1650 RPM||45.8 dB(A)||46.15°C||0.997|
|CL1||0.100A||15.021A||15.005A||0.005A||126.588||88.385%||540 RPM||15.8 dB(A)||43.61°C||0.982|
|CL2||82.929A||1.002A||1.003A||1.002A||1024.403||89.427%||1490 RPM||42.6 dB(A)||44.70°C||0.997|
All of the rails offer great load regulation. However, Seasonic's SSR-1000PD registers better overall performance in this section. Frankly, we're not surprised. Since the SSD-1000TR emphasizes efficiency, compromises had to be made in other areas.
Speaking of efficiency, the 80 PLUS Titanium threshold is met with 10% load, and the same goes for 20% load. With 50% and 100% load, this PSU doesn't satisfy the Titanium certification's requirements. Then again, we also test at much higher ambient temperatures than 80 PLUS, so our results are expected. Regardless, this is still one of the most efficient 1kW PSUs.
Noise output remains low up to the 80% load test, and as you can see, the fan's speed drops with a 50% load. This happens because the fan starts spinning fast initially, and as its voltage input increases up to a certain threshold, speed decreases. Seasonic's trick allows for a low start-up fan voltage.
MORE: Best Power Supplies
MORE: All Power Supply Content