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Will this powersupply be sufficient? - Page 2

post #11 of 17
Quote:
Originally Posted by om3n View Post
I am now going to continue building my server... and I am looking at this antec earthwatts 380 psu to power it.

I am thinking of using a C2D, maybe 6 hard drives at the max, and a very low end video card, and possibly in the future even my Q6600 if I go i7 in a few months.

What do you guys think?
Should be good to go! As long as you keep in specs with what you have in it. The hard-drives wont be pulling much at all.
    
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post #12 of 17
Remember, though, that a higher wattage power supply is usually more efficient, even for lower wattages, than a lower wattage power supply, so getting more than you need will actually be a good idea, regardless of how much power you actually use.
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post #13 of 17
Quote:
Originally Posted by timw4mail View Post
Remember, though, that a higher wattage power supply is usually more efficient, even for lower wattages, than a lower wattage power supply, so getting more than you need will actually be a good idea, regardless of how much power you actually use.
Really? Everything I have read says PSU get more efficient the closer to their rated power ie a 1000 w PSU running @ 300 w is less efficient than a 380w PSU running @ 300w (with their efficiency rating both being an 80+)

edit: after looking at jonnyguru's site at some of his reviews, it is all over the place. SOme are the same efficiency at almost all output ranges, others are lower at lower watts and some are highr at lower watts. I think now it is more important to look for an 80+ certified, since it will be above 80% at almost any output.
Edited by blupupher - 12/12/08 at 2:21pm
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post #14 of 17
Quote:
Originally Posted by blupupher View Post
Really? Everything I have read says PSU get more efficient the closer to their rated power ie a 1000 w PSU running @ 300 w is less efficient than a 380w PSU running @ 300w (with their efficiency rating both being an 80+)
Peak efficiency is usually at ~50%. Going with your example, the EA380 is ~83% efficient at a load of 300W and a 1000W PSU (let's go with a Corsair) is ~82% efficient at a load of 300W. Of course there is always variation but I would say there is a general trend (the graph shown in the EA380 test report is a good visual):

50% load- most efficient
25% + 75%- slightly less efficient than 50% load
100%- even less efficient
<25% load - least efficient (80plus doesn't test at these levels but usually around 10-15% efficiency is quite poor)
Edited by shinji2k - 12/12/08 at 2:17pm
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post #15 of 17
Quote:
Originally Posted by timw4mail View Post
Remember, though, that a higher wattage power supply is usually more efficient, even for lower wattages, than a lower wattage power supply, so getting more than you need will actually be a good idea, regardless of how much power you actually use.
That's very wrong. PSU generally are most efficient at around 40-80%. So a 1200w PSU efficiency is usually bad for 200w systems. Newer PSUs don't drop in performance that much but what you stated is absolutely wrong.


BTW, NVIDIA will be posting a 15% off any PSU code soon for their holiday promotion.
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post #16 of 17
Thread Starter 
do you guys think I made a wise purchase then?
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post #17 of 17
Yes, the EW380 is just fine for your needs.
Even with all 6 HDD running and the CPU overclocked and a PCI-e card that does not need a 6 pin power plug you will be less than 150 watts.
Edited by blupupher - 12/12/08 at 7:35pm
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