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Can anyone tell me if there is a true difference in bronze,silver ,gold or platinum psu's?

post #1 of 8
Thread Starter 
I could also use some recommendations for a decent 1000w psu that's around $150. Cheaper if possible.
post #2 of 8
Why 1000W? What 3 GPus are you using that you need that much Power?
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Ishimura
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post #3 of 8
Difference is in efficiency under load.
Bronze = 80%+
silver = 85%+
gold = 90%+
plat = 92%+

if I remember correctly
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My Rig
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post #4 of 8
Quote:
Originally Posted by ronnin426850 View Post

Difference is in efficiency under load.
Bronze = 80%+
silver = 85%+
gold = 90%+
plat = 92%+
if I remember correctly

Tweak those a bit, you also forgot about basic 80+, so the list would be like this

80+ = 80%
Bronze = ~83%
Silver = ~86%
Gold = ~89%
Platinum = ~92%

However, you must remember that PSU's are tested at temperatures lower than normal room temperature when being tested for 80+ which actually improves whatever their real figure would be. In reality it does not really matter that much, I'd be just as happy with an 80+ Bronze unit as I would be with an 80+ gold unit if the bronze unit had superior electrical performance (i.e. ripple suppression and voltage regulation).
Edited by bR0ken_pr0Jector - 3/16/12 at 2:57pm
post #5 of 8
Quote:
Originally Posted by bR0ken_pr0Jector View Post

Tweak those a bit, you also forgot about basic 80+, so the list would be like this
80+ = 80%
Bronze = ~83%
Silver = ~86%
Gold = ~89%
Platinum = ~92%
However, you must remember that PSU's are tested at temperatures lower than normal room temperature when being tested for 80+ which actually improves whatever their real figure would be. In reality it does not really matter that much, I'd be just as happy with an 80+ Bronze unit as I would be with an 80+ gold unit if the bronze unit had superior electrical performance (i.e. ripple suppression and voltage regulation).

Keep in mind, there are also different loads that their efficiency ratings are tested at.
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post #6 of 8
There's not that much relationship between high power supply quality (good construction for low failure rate, stable power delivery under a wide variety of dynamic loading, and so on) and the efficiency, other than the fact that consumers seem to expect most premium-class power supplies to be of very high efficiency. Higher efficiency comes from choosing certain overall electric circuit designs and using certain higher-grade components in some sense (for lower equivalent series resistance or on-resistance mostly). Because these things cost extra, most companies will only design the more expensive units to have higher efficiency.


If you really need to power 3 flagship graphics cards and want something as cheap as possible, I think Kingwin KX-1000 for $130 is good:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817121090

I don't think it's been tested, but supposedly it uses some similar design as Super Flower Golden Green. Since it's a newer release I'd guess some kind of newer design from Super Flower, which probably is going to be decent. But I guess even if it's just like their 80 plus bronze Amazon it wouldn't be that bad anyway.
post #7 of 8
Thread Starter 
thanks for all the info. and the reason i am getting so much wattage is neweggs calculator figured close to 600w, so i figured the difference in price was so minimal, id just go to a 1000w and never have to think about it.
post #8 of 8
newegg's "calculator" grossly overestimates values, because (1) higher-wattage units can be sold for higher profit and (2) they stock a lot of really low-quality stuff that can't actually meet rated wattage. If you're not ever going to have more than two flagship graphics cards, you don't need to look higher than a solid 750W unit. If you're sticking to single graphics card setups, a good 500W is already enough to not have to think about it again unless maybe you're really pushing a i7-3960x or FX-8150 with a top graphics card or something like that. If somehow someday you want to run four-way SLI flagships, 1000W may not be enough, so maybe you do have to think about it.

By getting something rated for extra wattage, you're just throwing away money instead of getting something of higher quality (less likely to fail over time), that will provide maybe cleaner power, and do so at maybe higher efficiency.
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