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 Post subject: New Seasonic PRIME Titanium Review
PostPosted: Tue Apr 11, 2017 12:08 pm 
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Joined: Tue Jul 22, 2008 6:05 pm
Posts: 263
Location: Calgary, AB, Canada
Anandtech just reviewed the new Seasonic PSU line called PRIME Titanium. Tested units: 650W, 750W, and 850W.

http://www.anandtech.com/show/11252/the ... y-review/4

Bottom line seems to be outstanding electrical performance efficiency and build quality, but fan acoustics get noisy when running above 300W.


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 Post subject: Re: New Seasonic PRIME Titanium Review
PostPosted: Wed Apr 12, 2017 12:36 am 
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Joined: Wed Jun 13, 2007 10:12 am
Posts: 5275
Location: ITALY
whispercat wrote:
Bottom line seems to be outstanding electrical performance efficiency and build quality, but fan acoustics get noisy when running above 300W.

I look at anything Fylladitakis writes about acoustics in a suspicious light.

Those are the fan curves at 40-47°C of the 650W and 850W as recorded by THG:

650W Image

850W Image

Albeit apparently the 650W fan tops under 700rpm while the 850W one tops over 1200rpm, Fylladitakis reported the 650W as way louder than the 850W.

Well, probably I'm biased/prejudiced against him, but frankly I don't trust a guy who I was told doesn't even own the test equipment he used. :roll:


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 Post subject: Re: New Seasonic PRIME Titanium Review
PostPosted: Thu Jun 15, 2017 1:24 am 
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Joined: Fri Jun 09, 2017 4:36 am
Posts: 14
quest_for_silence wrote:

Albeit apparently the 650W fan tops under 700rpm while the 850W one tops over 1200rpm, Fylladitakis reported the 650W as way louder than the 850W.

Well, probably I'm biased/prejudiced against him, but frankly I don't trust a guy who I was told doesn't even own the test equipment he used. :roll:


If we look at lower ranges, 850W fan seems to be quieter, operating at 420 rpm, while the 650W starts at 490.

I'm looking at 400-500W range, which should be about the average for your highest tdp single gpu (like 1080 Ti) coupled with overclocked high end cpus:

650W model drops from starting 490 rpm to 400 rpm @ 400W, and rises back to 490 rpm @ 500W <- wtf?
850W model remains at 420 rpm up to 400W, but rises to 540 rpm @ 500W,

My conclusion from this: wtf?

850W seems to be a tiny bit quieter below 400W range. But right after that it starts spinning up a little faster than the 650, which actually did the opposite in this scenario. Interesting, but probably doesn't mean anything, it's a synthetic test.

However in both cases these are very acceptable rpm/acoustics, but I'm just looking for a better pick for my ~500W system. In the end it really doesn't matter at all since it will be way better than my current psu, and the gpu will remain the most loud component in my, and likely most other systems anyway. Now when I think about it, even at low profile gaming, lowest rpm on the gpu fans are around 800, and there's 3 of them, and they're smaller, so, yeah. I'm really nitpicking here, but I just find it interesting how the fan profiles are strangely different on these models.


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