AC Ripple and Noise on the DC Outputs
The amount of AC ripple and noise present on the DC outputs was checked using a digital oscilloscope. This AC component may be present in the KHz range where most switching power supplies operate or it may be more prevalent at the 60 Hz line frequency. We adjust the O-scope time base to look for AC ripple at both low and high frequencies. The ATX12V V2.2 specification for DC output noise/ripple is defined in the ATX12V Power Supply Design Guide.
Ideally we would like to see no AC ripple (repetitive) or noise (random) on the DC outputs – the cleaner the better! But in reality there will always be some present. I measured the amplitude of the AC signal (in millivolts, peak-to-peak) to see how well the power supply complied with the ATX standard. The following table lists the ripple/noise results during all of the load tests for the main output voltages of interest.
Again, all three PRIME Titanium Series power supplies exhibited outstanding AC ripple and noise suppression across the full range of loads. The results were nearly identical from one unit to another.
I know what my next power
I know what my next power supply will be!
Love Seasonic
My only regret is that I may
My only regret is that I may never own one of these, because my present PSU (1kw Seasonic KM3 gold) is taking too long to die.
Has Seasonic got their coil
Has Seasonic got their coil whine situation sorted out yet? I think I’ve had 1 out of 6 Seasonic X and Platinum series units that didn’t have an unacceptable level of noise (what the hell is the point of quiet fans and passive operation if the circuitry is squealing like a pig with its nuts in a vice?), so I’ve been using SuperFlower based PSUs over the last year or so.
The SuperFlower Leadex plugs/sockets are also 100x better than Seasonic’s death grip ones which always feel like they’re taking excessive force to insert in my experience.
Not sure, but I’ve had the
Not sure, but I’ve had the same problems. I learned that it’s better to buy Corsair with Seasonic as the key, because then you can at least do an advanced exchange. It gets old having to wait for a replacement after three times.
Key=oem
Key=oem
I have not experienced any
I have not experienced any high frequency whine from any of the units I have tested – dead silent.
And no catsup-and-mustard
And no catsup-and-mustard coloring at the end of those beautiful cables! Awesome!
I picked up one of the 750W
I picked up one of the 750W models to replace a 5 year old Seasonic X (which was great). Have been extremely satisfied with these PSUs and i recommend them to everyone. Keep up the great reviews guys!
I just built a new machine
I just built a new machine with an X850 Gold. No regrets buying it but the primes look really nice too.
I dont know why they didnt go with a Sanyo Denki fan.
“Weaknesses :
• Close
“Weaknesses :
• Close spacing of connectors on front panel can make disconnecting cables a little difficult for people with large fingers”
Seems like clutching at straws 🙂
Maybe sometimes it OK to say “This product is actually perfect”
But how does it compare to
But how does it compare to other PSUs?
Theyre among the best ATX
Theyre among the best ATX PSUs you can get.
Excellent review as always, I
Excellent review as always, I just bought the PRIME 850 W Titanium.
However you may want to update your review as Seasonic have now raise their industry leading warranty to 12 years (from 10 years).
I found out about it on Toms Hardware.
http://www.tomshardware.com/news/seasonic-prime-12-year-warranty,33791.html
http://seasonic.com/prime/
Keep up the great work.