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PC with least Electricity consumption possible for running 24 hrs continuously - Page 2

post #11 of 13
Quote:
Originally Posted by John117 View Post

as you said the system wont use 400 w , but it will draw from the grid a power of 400w , right ?
i am not a electrical engineering student !!

so it will only draw power whats necessary .........
so less electricity bills

and less fans = less consumption as well
so ......... as i am conscious about my electricity bills , so i am asking ......... i have to pay for only about 62 W of power usage and not more than that?

as for your other points
i agree about
more the cramped system = more heat = less life
so is there any non mini ITX boards (just to be on the safe side) .......... as you pointed out that you have doubts about them running 24X7
for example any mini atx board
i have a spare cabinet (atx) left in my room with one fan only ........... i can use it

The PSU will not draw 400W from the wall, it only draws the energy that it needs to use. 400W is the maximum it could draw if you placed enough load on it, but with the configuration I listed, it would be impossible to draw even half of that. The 80Plus Platinum certification is the best available, and means the PSU operates with 90% efficiency. That essentially means that if the system needed 62W to run, the PSU would draw roughly 69W from the wall (solve 0.9x = 62).

For example, the PSU listed by Phaedrus2129, while it is only 300W, would actually consume more energy to power a system than the 400W PSU that I listed, since the 400W one is 80Plus Platinum, but the 300W one is only 80Plus Gold (and it has a fan).

The 62W figure that I quoted was calculated assuming that 50% of TDP of the CPU being utilized, and 60% overall system load. Even that would be well above the average load placed on the system. While transferring files, downloading, or recording a CCTV feed, I can't imagine a load of above 20% tops. Nor with watching a youtube video.

Unfortunately I am not aware of any Mini ATX boards that would be good, but the one I listed is MicroATX. Also note that it only has a PCI-e x16 slot, while the Wi-Fi card I recommended uses a PCI-e x1 slot. That will not be a problem, as you can installed an x1 card into an x16 slot (the larger PCI-e slots are compatible with the smaller ones).

EDIT:
Also be aware the warranty on the PSU I listed is a whole 7 years. None of the others come close.
Edited by W4nderer - 4/7/13 at 11:26am
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post #12 of 13
OP when picking a Power supply make sure you get one with just the right amount of power so you have the best efficiency. Hooking a 500watt PS to a system only drawing 70watts is just going to make the power supply waste power.

You want the PC's load Power to be in the 80% of total PS power. So if I was you I would look for a good Quality 200-300watt PS.

As for CPU
Those AMD CPU's everyone has been showing you will use less power then a Intel chip and will give you better graphic support. GPU is good enough for offloading.
While a Intel CPU will give you a good deal of extra CPU power while only using a few extra wats (maybe around 10more watts) and you might be able to under volt that and bring it down even more. Only thing that sucks about this chip is the GPU sucks and the GPU drivers blow . While the GPU will offload most things, future support is iffy and again driver are going to suck.
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post #13 of 13
Quote:
Originally Posted by John117 View Post

you are suggesting to get a usb wifi ??

If you need to. Youve got one PCIE slot so you could use it for a wireless card. What else would you use it for anyways? I cant imagine youd have a sound card in this machine.
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