what will happen if (750W or 850W PSU) connected to (410W PSU recommended components) ?

[Abdallahmgz]

i have this pc http://pcpartpicker.com/p/4mbzdC
that need 411W but i'm willing to buy SLI setup in the future which will increase the wattage to 580W .
do you recommend having smaller PSU ?
or going with 750W ? and if i did buy 750W PSU, will it decrease efficiency ?

 

[Saberus]

The PSU will output what is demanded. Many PSUs actually have better efficiency ratings when under 50-60% load than at max.

 

[Dunlop0078]

Nothing, it will power them. If your planning on going sli in the future i would go with the 850watt for more head room. The psu may be slightly less efficient running at such a low load but i doubt it would be anything you would notice in your power bill. What psu are you looking at? I recommend this.

http://pcpartpicker.com/part/evga-power-supply-220g20850xr

 

[Abdallahmgz]

Nothing, it will power them. If your planning on going sli in the future i would go with the 850watt for more head room. The psu may be slightly less efficient running at such a low load but i doubt it would be anything you would notice in your power bill. What psu are you looking at? I recommend this.

http://pcpartpicker.com/part/evga-power-supply-220g20850xr

wont i get fluctuation and other power delivery ?

 

[Saberus]

Nope.

 

[Dunlop0078]

Nothing, it will power them. If your planning on going sli in the future i would go with the 850watt for more head room. The psu may be slightly less efficient running at such a low load but i doubt it would be anything you would notice in your power bill. What psu are you looking at? I recommend this.

http://pcpartpicker.com/part/evga-power-supply-220g20850xr

wont i get fluctuation and other power delivery ?

Not with that psu.

 

[Abdallahmgz]

Nothing, it will power them. If your planning on going sli in the future i would go with the 850watt for more head room. The psu may be slightly less efficient running at such a low load but i doubt it would be anything you would notice in your power bill. What psu are you looking at? I recommend this.

http://pcpartpicker.com/part/evga-power-supply-220g20850xr

wont i get fluctuation and other power delivery ?

Not with that psu.

what about this PSU : HX750i

 

[Dunlop0078]

Nothing, it will power them. If your planning on going sli in the future i would go with the 850watt for more head room. The psu may be slightly less efficient running at such a low load but i doubt it would be anything you would notice in your power bill. What psu are you looking at? I recommend this.

http://pcpartpicker.com/part/evga-power-supply-220g20850xr

wont i get fluctuation and other power delivery ?

Not with that psu.

what about this PSU : HX750i

Yah that would be fine but i dont know why you would want that its more expensive and worse than the evga 750. The corsair may be 80plus platinum but it performs worse in all the important things like voltage regulation, ripple suppression etc.

Corsair: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139084

EVGA: http://www.newegg.com/Product/Product.aspx?Item=N82E16817438017