DC Load Regulation and AC Ripple
DC Output Load Regulation
To simulate real world and maximum loading conditions, the Cyonic AU-450x power supply was connected to the load testers and supplied with a constant 115 VAC. In this test we are interested in seeing how well a PSU can maintain the various output voltages while operating under different loads.
The ATX12V V2.2 tolerance for voltages states how much each output (rail) is allowed to fluctuate and has tighter tolerances now for the +12V outputs. I have also included a second table of expanded tolerances (±1% to ±6%) for reference.
The following tables list the DC voltage results for the PSU while operating on 115 VAC, 60 Hz.
The AU-450x produced good voltage regulation on all of the DC outputs.
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.
The Cyonic AU-450x power supply exhibited good AC ripple suppression on all of the primary outputs, all the way up to full load.
Its always nice to see
Its always nice to see Seasonic being rebranded over some junk brand.
The problem is, like the article says, you can buy a Seasonic branded PSU or even an Antec thats also a rebranded Seasonic(some of them have lit fans to differentiate them from Seasonics standard models) for about the same price.
If they want to charge a lot, they should have Seasonic build their with differentiating features. Custom paints, cable sleeves, monitoring sensors or software like Corsairs Flextronics rebrands, or something to entice people to buy it.
Someone informed enough to know its good BECAUSE its a rebranded Seasonic probably wont buy it over a standard Seasonic without some incentive like that.
I use Antecs Seasonics since they go on sale a lot. Thatd be a good reason for this PSU too.
Cyo-who?
“The more the
Cyo-who?
“The more the merrier”, I guess. I just hope that more competition brings prices further down across the globe.
Since it is a rebranded
Since it is a rebranded Seasonic PSU and is 20mm shorter (quite cool actually) I would probably buy one, but it NEEDS to come in cheaper than a ‘known’ brand to sell any units.
As long as more competitors
As long as more competitors on the market outright FORCE Corsair to cut down prices for their GODLIKE RM, HX, and AX PSUs, I’ll be absolutely fine with this.
I hope you realize that a lot
I hope you realize that a lot of the decent Corsairs are just REBRANDED SEASONICS too. The AXi is rebranded Flextronics.
Most Corsairs are rebranded CWT junk and they DONT MANUFACTURE ANY PSUs. They just rebrand.
I know a lot of people trust Corsair since some of their older PSUs were rebrands of good stuff but i usually tell people to stay away from them. Its like G.Skill with memory. No reason to use them and theyre kind of a ripoff since theyre just rebrands of other companies stuff lol.
It’s not “rebranding”, it’s
It’s not “rebranding”, it’s just OEM’ing. These are not same thing. “Rebranding” is when a company either makes a “new” line of products which is essentially re-badged older line (in other words – AMD), OR gets a batch of reference units from some party by default (in example – reference video cards) so that it can sell it under it’s name. Corsair’s relationship with SeaSonic is nothing like that, because Corsair DIRECTLY OEMs from SeaSonic under the long-=term contract. It’s a very well known fact that Corsair OEMs from SeaSonic, and been doing so for many years, this really can’t be called “rebranding” simply because SeaSonic makes units DIRECTLY for Corsair, under Corsair’s supervision and with Corsair’s specific vision on PSUs. This could’ve been called “rebranding” only in the case if SeaSonic was making ABSOLUTELY THE SAME PSUs for EVERYONE out there to whom it OEMs, but they’r NOT doing it in regards to Corsair because they’re working DIRECTLY for Corsair under the long-term contract, so this is not “rebranding” in all actuality. Also, no, Corsair doesn’t OEM 100% of all of their PSU units. Only AX, HX, RM, CS and CX lines. If my memory is correct, TX/VS/VX were in-house products.
Corsair VS is made by Channel
Corsair VS is made by Channel Well Technology.
TX and VX were discontinued, so I have no info on those.
But I am fairly certain that Corsair has never made their own power supplies. Even the Corsair CX that is currently made by Channel Well Technology started out in 2009 as a Seasonic made unit.
Corsair
AX / AXi series 760w – 1200w Seasonic (AX) / Flextronics (AXi)
AX1500i Flextronics
HXi Channel Well Technology
RMi 750w Channel Well Technology
RM 850w Channel Well Technology
CS Great Wall
RM Channel Well Technology (450w – 650w, 1000w) / Chicony (750w)
VS Channel Well Technology
Corsair CX / CXM Channel Well Technology
Corsair SF600 (unknown manufacturer)
So based on that info, only the AX series is now made by Seasonic.
I just bought these PSU and my fan is constantly working in around 1000 RPM. I bought because of silence and quality, but l am not sure now, it seems to be something is not OK, can you please help. I thought fan just start in 50%+ usage and can be regulated by own sensors with silence in mind, but that is not the case here, how come is that? My complete PC at full load need 250-300W ( not gaming, its business build, graphic card is R5 230 2gb with passive cooling), daily use is probably 150max, and l bought this AU450 version? What could be the case here? Thank you very much
I don’t know why the author thinks this is a Seasonic manufactured power supply, is it because of the similarity in shape?
Because this is DEFINITELY not made by Seasonic. It features a crappy group regulated design whereas Seasonic Focus series have DC-DC topology (you can’t spot the dual 5V converter coils here). Also the daughter board for the modular connections is connected via internal wires and not wire-free like in a real Seasonic Focus power supply.
I hight doubt that the test results are accurate too.
Seems like a well-made fake product and fake review to boot. Readers beware!
Lee didn’t write “fake” reviews, and he knew what he was doing with the test equipment. Also, when we ask the company “who was the OEM for this” and get a reply, we don’t have to guess who made it. You’re also commenting on a review posted 7 years ago. Keep trying to make a name for yourself in comment sections, “CapsnSpace”.