Need help with power supply

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jaysterbaby

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Feb 27, 2013
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I can get a great deal on a 1000w Antec Pro Platnium with 7 year warranty.

I was reading about my GPU which is the 4gb vram version Gigabyte 770GTX.and it recommends a 600W PSU

I am also going to go running about 7 Fans including Corsairs H100i.

I also have a i7-4770k and g.skill 16gb of ddr3 2133mhz ram

I am not cheaping out on a PSU I love the antec brand so I was thinking either the 850W platinum pro or 1000w platinum pro for like 20 dollars more.

What do you recommend? thank you
 
Solution
toyftw


Hi - No, not true (up to a point). As I mentioned above the PSU pulls only the current from the wall that
the PC components require. So, more power than you need doesn't do any harm. Actually, because the
PSU isn't working as hard it's fan will run less & be quieter and cooler.

Now, the "up to a point" I mentioned. Many PSU's are less efficient at very low power levels. The PSU's best
efficiency is generally when it is operating in the 40 - 70% range of it's total power potential.

So a very powerful PSU using 10% or less of it's total power...
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toyftw

toyftw

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Jul 29, 2012
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Hi - I'd save the $20 & get the 850 platinum unless you are a (crypto currency) bitcoin/litecoin miner.
An Antec 850 will power that rig (for gaming) even if you were to add a 2nd gtx770.
They are both well reviewed, Haswell ready and have the same OEM (Delta)

Fans use less than 5w a piece.

The 1kw PSU will do no harm other than costing more. Now, if you are a bitcoin/litecoin miner
than get the 1kw.
 
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J

jaysterbaby

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Feb 27, 2013
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do you mean costing more on my power bill? and no I'm not a miner. but I will be going SLI in future as well as triple monitor gaming.
I will also be doing MAX3DS. I was thinking of the Antec High Current gamer edition 850W which will knock down the price by 60-80$ but I do like the premium features offered in the high current pro.. plus is platinum level
 
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toyftw

toyftw

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Jul 29, 2012
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Hi again - no, I meant meant the initial cost of the PSU (costing more). Both are platinum units. so there
won't be any difference in electricity usage between them. If your components need 400w at any given
point in time than the PSU will provide the 400w. If they are 90% efficient, then either unit will pull 444w
from the wall. The difference being heat generated from the conversion of AC from the wall to DC for the components.

So a platinum unit will not only use a little less electricity but will also produce a little less heat
(at the same power draw).

If you're fairly certain you will be adding the 2nd gtx770, then an xtra $20 now on the PSU is a good way way to
go.

I'd stick with the platinum pro vs the bronze HCG even with the xtra $60 in cost. You will take yrs not months to save
the difference in electric bills, but as you said, you like the premium featurs of the platinum pro.
 
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J

jaysterbaby

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Feb 27, 2013
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Thank you, is it true that having to much psu power can actually cost most or perform more that having the sufficient amount.
I want to make sure I am not going to much over then I need
 
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toyftw

toyftw

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Jul 29, 2012
4,370
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16,960


Hi - No, not true (up to a point). As I mentioned above the PSU pulls only the current from the wall that
the PC components require. So, more power than you need doesn't do any harm. Actually, because the
PSU isn't working as hard it's fan will run less & be quieter and cooler.

Now, the "up to a point" I mentioned. Many PSU's are less efficient at very low power levels. The PSU's best
efficiency is generally when it is operating in the 40 - 70% range of it's total power potential.

So a very powerful PSU using 10% or less of it's total power could be far less efficient than if it's running
in the 40 - 70% range.

With your rig, I wouldn't be too concerned with this. You'll be fine whichever you choose, the 850 or 1kw.
 
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J

jaysterbaby

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Feb 27, 2013
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So if a build requires between 450W-600W then the 1000W will still be efficient at 45%-60%
which would be a good thing right?
why do people get just enough for there power like a 700W when they generate just above 600W
there would be no efficiency there..
 
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toyftw

toyftw

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Jul 29, 2012
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Hi again - Actually most people do the opposite, that is they get way more power than they need. It
is not uncommon to see rigs that can run fine on a 450, 500, or 550w PSU having 750 & 850w PSU's.

The key spec isn't total watts anyway, it's the +12v rail(s) amps available as the CPU, GPU, HDD, etc.,
all draw their current from the +12v rail(s). That in part is why GPU mfg's overstate the power requirements
for their cards. Older PSU designs often had too small a percent of the total devoted to the +12v.

Then, of course there's the junk PSU's that don't deliver their rated specs, so mfg's overstate total
wattage to account for it.

Keep in mind that a system that if everything is taxed at full power uses 600w, will very rarely use that
much, and a 1kw PSU would be overkill. In that instance I would use a 750 - 850w unit.

 
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toyftw

toyftw

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Jul 29, 2012
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Hi - Won't increase power bill, that would be determined by efficiency and use. I meant overkill in the
sense that 1khw is way more than needed for a system with one current gen GPU even allowing for
significant headroom. As I said above it won't cause any harm except to your wallet in upfront cost.
 
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