PSU Help????

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pratik03

pratik03

Journeyman
300 watts power consumption is not only because of your psu alone there are other factor affects this such as your monitor & ups system. CRT monitors are more power hungry consumes more than twice the power of lcd monitor. also pc+ups consumes more power than the pc alone

so you can't conclude that because of psu having 10% lesser efficiency than other psu will lead to 2.5k+ electricity bill increase for 2 years
 
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spikygv

Wise Old Owl
but what aditya is saying is rite , if u are using ur pc for 24hrs for all the 365 days. . .if the pc consumes about 700 bucks worth power a month . 10% will be quivalent to 70 bucks a month which in 2 yrs will come to about 1700 bucks ..

but i think most of us dont use pc for 24 hrs a day. . we may use it for max of 7-8 hrs ... so in 2 yrs , we may save about 600 bucks . .further , this is based on the assumption that pc ( excluding monitor , speakers . . just the components which get power from psu ) consumes 300W which i think is not likely to be the case .. i dont think anyone will use pc at full load for 24 hrs * 365 days. . idle pc( only those components which draw power from psu ) power consumption with today's tech will be much less than 300W . and only those pc's using high end cards end up with full load power of near 300W .most mid end users remain in the rage 200W at full load.

bottomline , i dont think we save much by choosing vx450W over CM 600W just taking efficiancy into account. ofcourse , i'm not saying that CM 600W is better ..
 
dOm1naTOr

dOm1naTOr

Wise Old Owl
nicely said sagargv
+1
And i doubt if the 450W Corsair can handle HD 3870 and a powerful proccy at oced conditions and some extra devices too like 2~3 HDDs nd ODDS.

Though theoritically CM 600 has 10% less efficiency than VX450, the avg power output from a 600W PSU @ 70% efficiency will handle such loads better.
The VX 450 dun seems to justify the price for a 450W PSU. There are many gud PSUs from CM, Antec, VIP etc with much higher power rating nd lower costs. But the VX 450 is real gud compared to other 450W PSUs not considering nyones prices.
 
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acewin

Point Blanc
ok, addin to the discussion because it is for PSU, guys when we generally buy a cabinet in it also a SMPS is alreay provided, what will happen of it.
Because certainly high end proccys are more in power reqs. I have been generally using systems in which I havent added any good PSUs, and run DG33 with 6750 C2D proccy. But didnt add any PSU in it.
 
adithyagenius

adithyagenius

I WANT MORE FPS!!
@sagarv, i dont know why you used 10% of electricity bill as saving. You should NOT use directly the difference of efficiencies to calculate difference in power draw. check the graphs of vx450 and the psu to find efficiency values at your cpu loads. The formula would be (efficiency of vx450 * electricty bill / efficiency of whatever psu)-electricity bill.
I also used to switch of monitor and speaker when downloading or away. But I used to game for 4-5 hours. The fact that 3870 system would draw more power than my setup which is too basic (first dual core ever) also would mean that 50% of usage as me would also lead to 2.5k+. This 2.5 times the price difference. so even if its further reduced 2.5 times and both are cost same in the end still it will be better to buy vx450 for silence and not contributing to global warming.
 
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spikygv

Wise Old Owl
ok . lets say the components inside cabby drawing power from psu , draw about 300W ( assuming u have a 3870 and u're running full load ) . so a 70% efficient psu will consume 428watt to give 300watt output . a 80% efficient psu will consume 375 watt .. . so the difference is 53 watt .

1 unit = 1 kilo watt hour . lets take 1 unit = 3.6 rs. ( i'm not sure if i'm rite here ) . .. then in one year , by choosing vx450W , we'll save 1600 bucks in ONE year. . ok , i stand corrected. But still this is based on the assumption that u're pc continuously consumes 300watt power . .

if u used ur pc for only 8 hrs a day . savings will drop to 600 bucks a year. .
 
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