[RelaxedTech] Interview With Seasonic's Product Manager, Kevin Hu - Page 3 - Overclock.net - An Overclocking Community

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[RelaxedTech] Interview With Seasonic's Product Manager, Kevin Hu

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post #21 of 29 (permalink) Old 11-18-2019, 11:42 AM
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Quote: Originally Posted by ToTheSun! View Post
That plat SF750 looks sweet. I don't think I've ever owned a PSU that is not Corsair, and I honestly see no reason to ever change that. "It just works."
Are there any problems w/cooling w/SFF PSU's? A 92mm fan doesn't seem very robust.
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post #22 of 29 (permalink) Old 11-18-2019, 01:00 PM
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If the power supply is the primary cooling fan for the system, it could be a problem.

As power supply efficiency has gone up. heat generation in the power supply has dropped(smaller heatsinks required, DC-DC converters for lower rails also helped). This allows pretty good cooling with slower or smaller fans.

Older systems used to rely quite a bit on the power supply for heat removal(and they had plenty of heat to remove from themselves). In this case the power supply may have more work to do.

I honestly DO have my media center power supply(with its 80mm slim fan) sucking hot air right off the cpu cooler. It has not been a problem yet, but this is not exactly a gaming system(even my "gaming" system is not exactly a gaming system by many standards).

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post #23 of 29 (permalink) Old 11-18-2019, 01:02 PM
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Quote: Originally Posted by 8051 View Post
Are there any problems w/cooling w/SFF PSU's? A 92mm fan doesn't seem very robust.
The fan is supposed to start spinning if the PSU overheats. To be honest, I don't think the fan on mine ever did. I'm not worried, especially when there are other units on the market with no fans at all.

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post #24 of 29 (permalink) Old 11-18-2019, 08:56 PM
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Quote: Originally Posted by 8051 View Post
Are there any problems w/cooling w/SFF PSU's? A 92mm fan doesn't seem very robust.
just consider thats a platnum and though i haven't seen a review to confirm, most will still be ~80% efficiency at 1%-10% load for maybe 14 watts of waste heat. unless it's running 80%+ loads you'll probably (just a wild guess really) maybe see ~20-30 watts of waste heat (???) for gaming and whatnot.

sure bigger fans would be quieter but the cooling needed is fine for 92mm.

Remember the golden rule of statistics: A personal sample size of one is a sufficient basis upon which to draw universal conclusions.
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post #25 of 29 (permalink) Old 11-19-2019, 08:26 AM
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Quote: Originally Posted by looniam View Post
just consider thats a platnum and though i haven't seen a review to confirm, most will still be ~80% efficiency at 1%-10% load for maybe 14 watts of waste heat. unless it's running 80%+ loads you'll probably (just a wild guess really) maybe see ~20-30 watts of waste heat (???) for gaming and whatnot.

sure bigger fans would be quieter but the cooling needed is fine for 92mm.
From what I have seen from www.plugloadsolutions.com, platinum rated power supplies are between 85% and 90% efficient at 10% load.
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post #26 of 29 (permalink) Old 11-19-2019, 10:22 AM
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Quote: Originally Posted by Gedm5 View Post
From what I have seen from www.plugloadsolutions.com, platinum rated power supplies are between 85% and 90% efficient at 10% load.
yeah i pulled those numbers out of the air from seeing the 10% load testing in TPU, PCper, tom's and anandtech's PSU reviews. i really thought i ran across a nonenglish site that did 5% load test and i recall thinking that is still hit 80+ cert (the white label).

so i definitely boo booed w/1%-10% and should be 5%-10% but i left the typo when i saw it. sometimes i'm actually surprised that someone reads my post.
but my/the point is plat (and ti) are a step above low load eff. it blows the only argument i have out of the water to getting an overkill PSU; the ~70% efficiency at </=10% with even gold cert.

Remember the golden rule of statistics: A personal sample size of one is a sufficient basis upon which to draw universal conclusions.
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post #27 of 29 (permalink) Old 11-19-2019, 06:07 PM
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Quote: Originally Posted by looniam View Post
Ah so half of the comments in this thread are void.
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post #28 of 29 (permalink) Old 11-23-2019, 06:46 PM - Thread Starter
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Quote: Originally Posted by HybridCore View Post
Just out of curiosity, are there many cases that do cause you to lose out on cooling or storage capacity for choosing SFX-L over SFX? Only one I can think of is the A4 since you can fit a radiator underneath the PSU if you do go with SFX over SFX-L.

I'm pretty sure the ones I listed are pretty agnostic to that. Stuff like the M1, Sentry, etc. mostly seem to just have the PSU alongside the mITX board, allowing for PSUs up to 145-150mm long (remaining 25-20mm for the GPU and some cable routing if it's not using the Steam Box or back-to-back layout, more if it is) which is still longer than SFX-L (125mm in Seasonic/Fractal's case, 130mm for Silverstone). SFX-L might even be preferred just due to the larger fan size and or lower power density.
I believe if you use an SFX-L psu in the M1, you won't be able to use the Noctua NH-C14 and you will be limited to smaller coolers like the NH-U9S.

Also, when you are building an SFF system, optimizing for airflow is very important and an SFX PSU will give you more room for airflow & cable management than an SFX-L psu.

The Corsair SFX PSU with its 92mm fan is far quieter than the SilverStone SFX-L PSU with its 120mm fan and is easily capable of powering a full blown system with a RTX 2080 TI and Ryzen 3700X. Why would anybody go with an SFX-L PSU when building an SFF system?
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post #29 of 29 (permalink) Old 11-23-2019, 11:56 PM
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Quote: Originally Posted by Capt View Post
I believe if you use an SFX-L psu in the M1, you won't be able to use the Noctua NH-C14 and you will be limited to smaller coolers like the NH-U9S.

Also, when you are building an SFF system, optimizing for airflow is very important and an SFX PSU will give you more room for airflow & cable management than an SFX-L psu.

The Corsair SFX PSU with its 92mm fan is far quieter than the SilverStone SFX-L PSU with its 120mm fan and is easily capable of powering a full blown system with a RTX 2080 TI and Ryzen 3700X. Why would anybody go with an SFX-L PSU when building an SFF system?
From what I'm seeing, even SFX causes an issue with the C14 if you use the SFX mount instead of the front ATX mount with the SFX-to-ATX adapter. Even with SFX-L in most of the popular mITX cases, that small amount of extra length doesn't cause any issues with blocking cooling + storage capacity and cable management (except the A4). I'm not so sure why you're so insistent that SFX-L is somehow worse when it clearly isn't.

Just because the 120mm fan doesn't have to spin as fast to move the same amount of air? It's pretty hard to draw comparisons here because some of the SFX-L units like the Seasonic one have more aggressive fan curves than necessary. If Corsair made an SFX-L unit that was identical in every way except the fan size, it'd be quieter just by virtue of the larger fan. They can even reduce power density a bit to spread out the heat generating components so they run cooler and the fan can stay off until a higher load than on the SFX unit, all without really creating any harm as far as cable management or cooling/storage capacity goes (again, sans A4) unless your idea of better cable management capability is cramming all of your cables into that extra space occupied by SFX-L PSUs over SFX.

Last edited by HybridCore; 11-24-2019 at 12:06 AM.
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