Differential Temperature and Noise Levels
To simulate a demanding environment, some of the warm exhaust air from each PSU under test is recirculated back to the intake through a passive air duct, which allows the PSU air inlet temperature to increase with load, just like it would in a real PC.
The differential temperature across the power supply was calculated by subtracting the internal case air temperature (T in) from the temperature of the warm exhaust air flowing out the back of the power supply (T out).
Thermocouples were placed at the air inlet and exhaust outlet. The ambient room air temperature was 23ºC (74ºF) +/- 0.5ºC during testing.
T out = temperature of air exhausting from power supply
T in = temperature of air entering power supply
Delta T = T out – T in
Sound pressure level readings were taken 3’ away from the rear of the case in an otherwise quiet room. The ambient noise level was ~27 dBA. The power supplies were tested with Hybrid Fan Control turned On (enabling fanless operation at low to mid power levels).
*Fan not spinning
The PRIME Titanium Series PSU cooling fan did not start spinning on any of the PSUs until we entered the 50% load test (the 650W unit fan started spinning soon after hitting the 50% load mark but the 750W and 850W unit’s fans didn’t start spinning until well into the tests). At the 75% load mark the fan noise was still relatively quiet and even at the 100% the fan noise never really became loud. Having great efficiency helps keep the waste heat and fan noise to a minimum.
(Courtesy of Seasonic)
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.
Should I still buy this in 2022???