Page 1:SilverStone ST80F-TI Power Supply Review
Page 2:Packaging, Contents, Exterior And Cabling
Page 3:A Look Inside And Component Analysis
Page 4:Load Regulation, Hold-Up Time And Inrush Current And Protections
Page 5:Efficiency, Temperature And Noise
Page 6:Protection Features Evaluation
Page 7:Cross-Load Tests And Infrared Images
Page 8:Transient Response Tests
Page 9:Ripple Measurements
Page 10:Performance, Performance Per Dollar, Noise and Efficiency Ratings
Page 11:Pros, Cons And Final Verdict
Load Regulation, Hold-Up Time And Inrush Current And Protections
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.
Not only is the hold-up time lower than 17ms, but the power-good signal also drops when the rails are already out of spec. This is a bad way to start our performance evaluation.
For details on our inrush current testing, please click here.
The inrush current is high with both voltage inputs. A larger NTC thermistor should have been used, along with a bypass relay.
Load Regulation And Efficiency Measurements
Our first set of tests reveals the stability of the voltage rails, along with the PSU's efficiency. The applied load equals (approximately) 10 to 110 percent of the maximum load the supply can handle, 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 indicates whether a PSU is Haswell-ready 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 (RPM)||Fan Noise||Temps (In/Out)||PF/AC Volts|
|1||4.912A||2.004A||1.961A||1.006A||79.78||91.74%||705||26.0 dB(A)||38.03 °C||0.939|
|2||10.880A||3.001A||2.945A||1.207A||159.64||93.83%||705||26.0 dB(A)||38.11 °C||0.967|
|3||17.221A||3.511A||3.457A||1.413A||239.83||93.94%||705||26.0 dB(A)||39.07 °C||0.980|
|4||23.549A||4.025A||3.940A||1.620A||319.74||93.46%||850||27.1 dB(A)||39.76 °C||0.983|
|5||29.532A||5.030A||4.931A||1.825A||399.61||92.85%||1320||37.4 dB(A)||41.07 °C||0.986|
|6||35.534A||6.055A||5.924A||2.033A||479.66||91.69%||1830||45.0 dB(A)||41.71 °C||0.988|
|7||41.528A||7.069A||6.918A||2.241A||559.60||90.95%||2100||48.5 dB(A)||42.83 °C||0.990|
|8||47.525A||8.093A||7.913A||2.448A||639.55||90.17%||2280||48.8 dB(A)||44.75 °C||0.990|
|9||53.968A||8.613A||8.434A||2.450A||719.58||89.50%||2280||48.8 dB(A)||45.49 °C||0.992|
|10||60.379A||9.130A||8.927A||2.555A||799.39||88.88%||2280||48.8 dB(A)||46.13 °C||0.992|
|11||67.180A||9.139A||8.947A||2.560A||879.36||88.12%||2280||48.8 dB(A)||46.82 °C||0.993|
|CL1||0.099A||14.022A||14.005A||0.000A||118.17||86.67%||2200||48.7 dB(A)||44.18 °C||0.960|
|CL2||65.960A||1.003A||1.003A||1.002A||791.22||89.42%||2280||48.8 dB(A)||44.78 °C||0.993|
Load regulation is very tight, especially on the +12V rail. This Enhance platform offers excellent voltage stability, though we cannot say the same for ripple suppression. Under tough conditions and with up to 40% of its maximum-capacity load, the PSU's fan rotates slowly, generating minimal noise. The story changes quite a bit under higher load conditions, and the fan spins at full speed with anything above 80% load.
We also discovered the over-temperature protection feature's trigger point of close to 47 °C ambient during our full load and overload tests. Given that this PSU is rated at only 40 °C, OTP looks to be correctly configured.
When it comes to efficiency, the ST80F-TI easily clears the 10% and 20% load test requirements. However, it falls short in the 50% and full load tests with notably lower levels. High ambient temperatures obviously play a key role, keeping this PSU from satisfying the 80 PLUS Titanium requirements.
- SilverStone ST80F-TI Power Supply Review
- Packaging, Contents, Exterior And Cabling
- A Look Inside And Component Analysis
- Load Regulation, Hold-Up Time And Inrush Current And Protections
- Efficiency, Temperature And Noise
- Protection Features Evaluation
- Cross-Load Tests And Infrared Images
- Transient Response Tests
- Ripple Measurements
- Performance, Performance Per Dollar, Noise and Efficiency Ratings
- Pros, Cons And Final Verdict