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 pretty long, and the power-good signal is accurate. This is what we expect from a Seasonic PSU.
For details on our inrush current testing, please click here.
With 115V, the inrush current is low. However, the situation turns with 230V input.
Load Regulation And Efficiency Measurements
The first set of tests reveals the stability of the voltage rails and the SSR-850FX'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||5.222A||1.996A||1.987A||0.985A||84.992||86.748%||621 RPM||11.6 dB(A)||41.65°C||0.973|
|2||11.485A||2.997A||2.979A||1.184A||170.301||90.194%||565 RPM||10.7 dB(A)||38.83°C||0.988|
|3||18.076A||3.497A||3.490A||1.384A||255.483||91.014%||550 RPM||10.4 dB(A)||39.01°C||0.990|
|4||24.667A||3.997A||3.973A||1.585A||340.575||91.022%||550 RPM||10.4 dB(A)||39.57°C||0.991|
|5||30.861A||4.998A||4.968A||1.786A||425.082||90.655%||560 RPM||10.5 dB(A)||40.75°C||0.990|
|6||37.117A||5.997A||5.965A||1.988A||510.384||90.095%||880 RPM||20.6 dB(A)||41.79°C||0.991|
|7||43.348A||6.997A||6.961A||2.192A||595.278||89.427%||1333 RPM||31.4 dB(A)||42.33°C||0.991|
|8||49.587A||7.998A||7.962A||2.395A||680.212||88.693%||1984 RPM||41.5 dB(A)||42.93°C||0.992|
|9||56.248A||8.499A||8.474A||2.398A||765.241||87.942%||2310 RPM||45.1 dB(A)||44.02°C||0.992|
|10||62.643A||9.000A||8.958A||3.009A||849.956||87.009%||2320 RPM||45.2 dB(A)||45.40°C||0.993|
|11||69.683A||9.000A||8.962A||3.012A||935.525||85.851%||2320 RPM||45.2 dB(A)||47.19°C||0.993|
|CL1||0.159A||12.001A||12.000A||0.001A||101.985||85.242%||560 RPM||10.5 dB(A)||43.42°C||0.983|
|CL2||70.008A||1.002A||1.001A||1.001A||863.063||87.262%||2320 RPM||45.2 dB(A)||45.75°C||0.993|
On every rail except the 5VSB one (which is still within 3%), the load regulation we observe is extremely tight. Seasonic's new platform achieves excellent performance in this discipline, despite its budget orientation. The measured efficiency levels are pretty good as well, while the fan profile is relaxed. It's only when you push the PSU hard, under 80% of its maximum-rated-capacity load and high operating temperatures, that the fan spins at full speed.
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Last week newegg had the 650 watt model on sale for $74.99. There was a $20.00 mail-in rebate which brought the price down to $54.99. On top of that there was a free $30.00 gift certificate for a fresh food vendor online which my wife wasted no time in using. That brought the final price down to $24.99. Best deal I've taken advantage of this year.
Initially I was really impressed that there was so much power in such a small package. Until I saw the cables, and the ridiculous capacitors. I know this brings a fantastic level of ripple, but I don't like it at all.
I gotta say, I really don't like this trend with higher end power supplies. As a modder, my cables are visible. And these cables would be satisfactory, if the capacitors were located ON THE PSU SIDE!! But they are located on the component side where they can be seen in all their glorious ugliness. It is not recommended to change the polarity..
I will be checking the units I buy more carefully moving forward. I would much rather have a longer power supply unit that has the caps inside.
Bottom line though, it is a gold 850W unit at an affordable price and a 10 year warranty. For efficient cards like the RX570/580 and GTX 1060, there are enough cables for 6 video cards. Pretty good for mining, but as for a visible gaming rig I have to say 4 out of 5 stars for functionality. Just put the caps at the other end of the cable, ya big dummy.
The PCIe cables are a little different than what I am used to. The 850 model and my 650 watt version have PCIe cables with two connectors instead of just one at their device end. Does that mean one PCIe cable can be used for both connections on a graphics card? On the other hand do I still have to use two PCIe cables and let one connector on each cable just hang there?
Anybody else know?
It's okay though ... they will survive without your money.
I went back and read the review. In the specs it shows 3 PCI-e cables and 6 connectors. It also indicates the 3 cables could be used with 3 video cards, each requiring 2 connectors.
I'll take a look at the video. I've watched some of his other clips.
Don't know how I missed this development.