What happens if Overkill PSU

[tarun pc]

What if i put 550w psu and i have i3 6100 , gtx 1060 6gb it's overkill right? I have 450w right now so guessing to buy amd r5 1600x amd gtx 1070 but what if i put 550w right now

 

[MCMunroe]

Buying a larger than needed power supply usually just results in higher power usage at idle.
I can confirmed this from experience.

 

[bicycle_repair_man]

What specific PSU are we talking about? Wattage isn't an indicator of quality.

I don't see why a higher wattage PSU will result in increased power consumption when compared to a lower wattage PSU. A PSU is typically most efficient at about 50% load.

There's no reason why you can't go overkill on a PSU, but a quality unit with a lower wattage is ALWAYS better than a crap unit with high wattage, chiefly because the latter won't deliver the wattage it states.

 

[MCMunroe]

I don't see why a higher wattage PSU will result in increased power consumption when compared to a lower wattage PSU. A PSU is typically most efficient at about 50% load.

I am sure there are many variables, and I did state at idle.
Switching from a 450W supply to a 650W supply in a Core 2 Quad system (because everyone in the forums screamed that was what was causing my BSOD issues. It wasn't.), resulted in at windows idle power draw from the wall going from 44W to 68W.

Also in a more modern example from this fall, I went from a 750W Bronze to a 750W Platinum PSU, with less dramatic results. As you mentioned the big gains in efficiency where at the mid power draw.

Skylake
Gaming Desktop 
i7-6700k @ 4.4 GHz, 16GB DDR4, GTX 1080, 4 HDDs, 1 SSD
		Old		New
		Thermalteke	Corsair
		Smart750W	HX750 Platinum
		Watts
Off:		1		2
Idle:		56		61
Gaming:		102		101
Encoding:	177		150
Enc + Game:	224		192

 

[IAmAZ3R0]

The higher wattage isn't going to damage the components, it just has a higher capacity for max wattage than the 450w. What PSU are you planning on getting?

 

[turkey3_scratch]

Idle efficiency of a power supply really depends on the design of the power supply.

 

[tarun pc]

Any psu will be ok but CX 650w

 

[bicycle_repair_man]

The CX series with the silver Corsair logo is good, but the earlier green ones are a different story. What's your budget and where do you live?

 

[tarun pc]

India and greens ones are good right?

 

[bicycle_repair_man]

No, avoid the green ones if you can. What's your budget?

 

[tarun pc]

There is no budget for me so

 

[bicycle_repair_man]

If money is no object then the Seasonic Prime series is about as good as it gets. Generally speaking, it's difficult to go wrong with any Seasonic PSU.