1200 Watt PSU
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Newty182




Posts: 10805
Location: UK
PostPosted: Tue, 23rd Apr 2013 14:50    Post subject: 1200 Watt PSU
Laughing

So I bought an energy monitor and it was delivered today. I have been running some games and software to see what the maximum wattage my PC is pulling from the wall. The most, and remember this is from the wall, that my PC is using is less than 400 watts. My PSU is meant to be 80% efficient at 250+ watts. I have no idea how efficient it is at lower than 250.

I guess it was a bit higher when I had my 2 GTX 460's but I still didn't expect it to be that low.

From some quick tests and approximately

Idle 170 watts
Crysis 3 370-380 watts
3D Mark 350 watts ( Confused Less than crysis 3)
Folding and Prime 95 400 watts

That's all, you may now carry on with whatever it was you were doing. Smile

Edit: 4 HDD's btw. Even though each are only meant to use a maximum of 5 watts or less, depending on the brand/model


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couleur
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PostPosted: Tue, 23rd Apr 2013 15:08    Post subject:
It is known.


"Enlightenment is man's emergence from his self-imposed nonage. Nonage is the inability to use one's own understanding without another's guidance. This nonage is self-imposed if its cause lies not in lack of understanding but in indecision and lack of courage to use one's own mind without another's guidance. Dare to know! (Sapere aude.) "Have the courage to use your own understanding," is therefore the motto of the enlightenment."
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Newty182




Posts: 10805
Location: UK
PostPosted: Tue, 23rd Apr 2013 15:18    Post subject:
But still, at that load and about 90% efficiency of the PSU, that's like 360 watts... It just seems really low to me.


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Werelds
Special Little Man



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PostPosted: Tue, 23rd Apr 2013 16:02    Post subject:
It's not. And you're not getting 90% efficiency. Your PSU only hits the 90% mark at around 700-800W, below that it's between 85 and 88% most of the time; and at about 300 it drops very sharply to 80-82; below 250 it's just horrible.

At 380W and assuming 85% efficiency, you're really using 380 / (100 / 85) = 323W. That sounds about right; a little on the low side, but not by much. Your CPU probably does about 150W at those clocks, GPU won't be at full load even in Crysis even if the "meter" shows it is, so that'll be 180-190 at most. Everything else will be in the single digits.

And that's why I call everyone who goes over 800W a retard, because you're getting like 80W in heat there. That has to be cooled one way or another. Now, with an X-650 or something similar, i.e. a PSU that actually stays well above 90% efficiency even at 100W, you would've been pulling at least 50W less - that's how Seasonic's PSUs don't even spin up their fans until really, really stressed. And the damn thing would've been half as expensive.
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tonizito
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Posts: 51412
Location: Portugal, the shithole of Europe.
PostPosted: Tue, 23rd Apr 2013 16:19    Post subject:
Laughing indeed

Well, now you know it Razz


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PumpAction
[Schmadmin]



Posts: 26759

PostPosted: Tue, 23rd Apr 2013 16:25    Post subject:
How much does it cost to get such a decent ~450-500watt seasonic?


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Newty182




Posts: 10805
Location: UK
PostPosted: Tue, 23rd Apr 2013 16:46    Post subject:
Werelds wrote:
It's not. And you're not getting 90% efficiency. Your PSU only hits the 90% mark at around 700-800W, below that it's between 85 and 88% most of the time; and at about 300 it drops very sharply to 80-82; below 250 it's just horrible.


According to this it is 90% efficient at just 20% load http://www.anandtech.com/show/3992/1000w1200w-highend-psuroundup/13

Oh and 10% load/120 watts is 83% efficient.


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Werelds
Special Little Man



Posts: 15098
Location: 0100111001001100
PostPosted: Tue, 23rd Apr 2013 17:08    Post subject:
Jonny begs to differ: http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story3&reid=193 Smile

Anand and 80+ themselves test at about room temperature, which is nonsense. But even then (go back to page 2 on Jonny's), it still doesn't quite get there.

Edit: also, holy ripple Batman!
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