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Power Supply Help

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January 30, 2013 9:36:40 PM

Hi, I am building a PC and I decided to change my PSU because I want one that is modular.

At first, I chose the Kingwin 550W 80 PLUS Platinum Certified ATX12V / EPS12V Power Supply
But, now I'm looking at the Rosewill Tachyon 550W 80 PLUS Platinum Certified ATX12V / EPS12V Power Supply


I need help deciding which is better.
The one I chose originally is 89 - 92% efficient. The other one is > 89% efficient.
The Kingwin is not modular. The Rosewill is.
The Rosewill is cheaper, but I don't know why.
I need opinions. If you guys see anything that makes one better, please reply. Thanks in advance.

This is my build, if it makes any difference.

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a c 143 ) Power supply
January 30, 2013 9:54:58 PM

Your 550w psu is about the proper size for a 7850. The 7850 only needs 450w, but I like to overprovision a bit so that it operates in the more efficient third of it's range and will be quieter.

From a quality point of view, you could look at this list and pick a tier 1 or 2 unit. It should cost no more.
http://www.eggxpert.com/forums/thread/323050.aspx

As to gold/silver/platinum rating, you are unlikely to recoup enough savings in power to offset the increased costs.
But... a more efficient psu will not need to run the fan so much and will be quieter.

As to modular or not, I think it is a non issue. You will be using most of the leads from a properly sized psu anyway.
Only in a small form factor case might modular be a plus. In anything else, there is always space to tuck unused leads away out of the cooling airstream.
I might pick the SeaSonic M12II 620 Bronze 620W @$80 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

For what it is worth, I think you can buy a better Intel cpu for $190 than the FX-8350.
It is not the greatest for gaming. Do some research there.
January 30, 2013 10:12:54 PM

geofelt said:
Your 550w psu is about the proper size for a 7850. The 7850 only needs 450w, but I like to overprovision a bit so that it operates in the more efficient third of it's range and will be quieter.

From a quality point of view, you could look at this list and pick a tier 1 or 2 unit. It should cost no more.
http://www.eggxpert.com/forums/thread/323050.aspx

As to gold/silver/platinum rating, you are unlikely to recoup enough savings in power to offset the increased costs.
But... a more efficient psu will not need to run the fan so much and will be quieter.

As to modular or not, I think it is a non issue. You will be using most of the leads from a properly sized psu anyway.
Only in a small form factor case might modular be a plus. In anything else, there is always space to tuck unused leads away out of the cooling airstream.
I might pick the SeaSonic M12II 620 Bronze 620W @$80 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

For what it is worth, I think you can buy a better Intel cpu for $190 than the FX-8350.
It is not the greatest for gaming. Do some research there.


Hi, thanks for the help. The reason I want the 8350 is is for editing / rendering. I heard it's 8 cores is good for that.
And for gaming: the only game I play is Minecraft and I think the 8350 can handle that at a high frame rate.
But, really my only 2 choices for a PSU are those 2. I just need to know if they are reliable / recommended.

Thanks again for your help.
!