Monday, March 2nd 2020

SeaSonic Launches Trio of Fanless Premium PSUs

SeaSonic late last week launched three new fanless PSUs under the Prime Fanless series. The company expanded its Prime Fanless TX line of 80 Plus Titanium-certified power supplies with a new 700 W model, the Prime Fanless TX-700. This tops the series which has been led by a 600-Watt model since its debut back in 2017. The TX-700 offers full modular cabling, well over 95% efficiency with 230 VAC input, micro-tolerance load regulation (MTLR), APFC, most common electrical protections, and connectivity that include two 8-pin EPS, four 6+2 pin PCIe, and twelve SATA power connectors.

Next up, SeaSonic expanded its Prime Fanless PX line of 80 Plus Platinum certified PSUs with new 500 W and 450 W models. You get largely the same electrical feature-set as the Fanless TX series, but with around 93% efficiency at 230 VAC. You still get two 8-pin EPS connectors, but only up to two 6+2 pin PCIe power, and eight SATA power. SeaSonic is backing both its Prime Fanless TX and PX lines with an industry-leading 12-year product warranty that's probably supported by the fact that these PSUs have no moving parts.
Source: FanlessTech
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61 Comments on SeaSonic Launches Trio of Fanless Premium PSUs

#1
Dammeron
Got the first gen. of Seasonic X-650 since 2010 - still stayin' strong and quiet.
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#2
LocutusH
I wonder if such a 700w unit also works 24/7 without any air flow? I mean if its built in the bottom of the case, where nothing else generates airflow.
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#3
bug
I would love to have one, but I already have a perfectly fine Seasonic PSU.
What can I say, between a fanless PSU and CPU and GPU fans that will turn off in idle, you can build a PC that's no more noisy than a console.
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#4
F-man4
Only ATX Fanless PSUs.
Still no SFX, TFX, Flex-ATX Fanless PSUs.
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#5
dinmaster
Seasonic one of if not the best psu maker. expensive yes but you get what you pay for, maybe more. probably lots of stories about how long they last as well.
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#6
webdigo
I'm more worried about noticeable coilwhine, when there is no fan to drown it out.
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#7
Valantar
F-man4
Only ATX Fanless PSUs.
Still no SFX, TFX, Flex-ATX Fanless PSUs.
SilverStone begs to differ.

Still, it's hard to design fanless units for smaller form factors as they typically don't have much airflow around the PSU housing, which any fanless unit needs. Fanless Flex-ATX would be incompatible with a lot of Flex-ATX cases simply because they would cover three out of four sides with a steel panel with near zero heat transfer. Same goes for TFX. And frankly a lot of SFX cases too. On the other hand, going the DIY route (with a 12V or 19V AC-DC PSU + a plug-in DC-ATX board like the ones from HDPlex (19V) or Mini-Box (12V)) can net you reasonably powerful yet extremely compact fanless PSU setups.



The lower wattage versions here look very nice. Not least because units that low in power but that high in efficiency are relatively rare. No doubt you'll pay for the privilege, but these also tend to be way overbuilt (a fanless 700W PSU could likely be rated at 1000W or more if a fan was added). Still, 450W is sufficient for the vast majority of PCs today (anything with a ~210W GPU (2070S/5700 XT) + ~100W sustained CPU (so not an OC'd 9900K or 9700K, and possibly not a 3950X if you let it run wild) unless you stuff it full of HDDs and 20W Delta fans) with sufficient margin for cap degradation over the next 5-7 years and peace of mind, so these should make for some very nice upper mid-range builds.
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#8
-The_Mask-
dinmaster
Seasonic one of if not the best psu maker. expensive yes but you get what you pay for, maybe more. probably lots of stories about how long they last as well.
How good must your marketing be if you have so many people believe this, but you're actually really far away from that.
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#9
springs113
-The_Mask-
How good must your marketing be if you have so many people believe this, but you're actually really far away from that.
Please elaborate.
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#10
rawadinozor
-The_Mask-
How good must your marketing be if you have so many people believe this, but you're actually really far away from that.
i have already owned 3 Seasonic PSUs from the Gold-X line and can agree they are extremely reliable.
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#11
Animalpak
Love Seasonic i have a Corsair AX760 since 2014, but is a Seasonic unit still going strong and clean !
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#12
-The_Mask-
springs113
Please elaborate.
Well most people believe it to be true right. But it never has been true, everyone in the business can elaborate. Still most people believe it's true. So they must be pretty good in marketing.
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#13
springs113
-The_Mask-
Well most people believe it to be true right. But it never has been true, everyone in the business can elaborate. Still most people believe it's true. So they must be pretty good in marketing.
No disrespect but... that's utter nonsense. It's not marketing at all. Their platform is tried and true and the reviews speaks for themselves. All my psu except one are seasonic. The other is an Antec. I've had countless others but there must reliable that I've encountered is from Seasonic, whether it was a rebrand or direct. You stated something and couldn't quantify whatsoever twice... seems more like an opinion to me.
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#14
-The_Mask-
springs113
No disrespect but... that's utter nonsense. It's not marketing at all. Their platform is tried and true and the reviews speaks for themselves. All my psu except one are seasonic. The other is an Antec. I've had countless others but there must reliable that I've encountered is from Seasonic, whether it was a rebrand or direct. You stated something and couldn't quantify whatsoever twice... seems more like an opinion to me.
You're just proving my point. Their marketing is so effective that people don't even care about reading up on it. It's is so strong that I don't believe much can change the believe of people in this matter.
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#15
bug
-The_Mask-
You're just proving my point. Their marketing is so effective that people don't even care about reading up on it.
You're about to be reported for trolling. Please source your claims that Seasonic is anything but excellent or just stop. Please.
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#16
-The_Mask-
bug
You're about to be reported for trolling. Please source your claims that Seasonic is anything but excellent or just stop. Please.
Seriously? Reporting someone for trolling because you don't like it what he is saying? Why not actually read something about power supplies first? The forum of jonnyGURU is good start. You may actually learn something. Well if you want anyway.
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#18
csendesmark
700W fanless PSU is dope
But I will not risk it, will go for the 850W prime gold eventually :D
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#20
EarthDog
-The_Mask-
You're just proving my point. Their marketing is so effective that people don't even care about reading up on it. It's is so strong that I don't believe much can change the believe of people in this matter.
The onus is on you to provide proof of whatever you are tying to say. There are plenty of reviews from reputable websites that show an overwhelming majoirty of their units are quite good to great. See JG, here, etc. Only one I can think of is sub-par (S12 III)... So, unless you provide some links contrary to what is already out there, I think you are just trolling as well. Support your assertions since it goes against common knowledge...
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#21
the54thvoid
-The_Mask-
Seriously? Reporting someone for trolling because you don't like it what he is saying? Why not actually read something about power supplies first? The forum of jonnyGURU is good start. You may actually learn something. Well if you want anyway.
Actually, you're saying nothing except 'Seasonic are bad, Johnny Guru says so.' And you're doing nothing to back it up.

Contrary to your point, I can link this, or many other positive reviews:

www.anandtech.com/show/11252/the-seasonic-prime-titanium-power-supply-review
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#22
-The_Mask-
Where exactly did I say that Seasonic was bad? Please read what I said, because that's totally different from what you all assuming now.
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#23
the54thvoid
-The_Mask-
How good must your marketing be if you have so many people believe this, but you're actually really far away from that.
This. You state the opposite is true of convention, i.e. if Seasonic is thought to be great by the many, you state it is not. That's as good as saying bad.

Sorry, edit: you say they're 'really far away'. It was a very clear point you made.
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#24
-The_Mask-
I said that if you can let people believe that you are the best (or one of the best) manufacturers, but you are actually not and never have been, you marketing must be pretty good.
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#25
the54thvoid
Okay then. You're entitled to that opinion. But don't further derail the thread with it.
Posted on Reply
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