psu help

[TwixCJ]

If I get a 750w psu will it efficiency be effective if my pc only needs 500w

Link for pc http://uk.pcpartpicker.com/p/swgYwP

[LiamApex]

yes it will be fine and you will have room for upgrade

[TwixCJ]

yes it will be fine and you will have room for upgrade

Ok thanks

[LiamApex]

Ok thanks

no problem one time i was running a 300w system on a 750w psu and no problem just remember the 750W is a LIMIT not A TARGET

[Guest]

Just get a 550W. That board doesn't support SLI so you can't add a 2nd GTX 970 anyway.

[Enderman]

A PSU's best efficiency is at around 50% load, so a 750W will be more efficient than a 500W if your computer uses 500W

So yes a 750W PSU is a good choice

[Guest]

A PSU's best efficiency is at around 50% load, so a 750W will be more efficient than a 500W if your computer uses 500W

So yes a 750W PSU is a good choice

The difference is only a few % so not really worth bothering about. Plus a 750W will cost more to buy (Usually)

[TwixCJ]

Ok thanks

[Enderman]

The difference is only a few % so not really worth bothering about. Plus a 750W will cost more to buy (Usually)

No... usually it is about 20%+ difference between the most and least efficient the PSU curve can be.

[Guest]

No... usually it is about 20%+ difference between the most and least efficient the PSU curve can be.

Where did you pull that wild figure from ? 

 

A Bronze rated psu is 81% @ 20% load, 85% at 50% load and 81% at 100% for 230V

 

A Gold rated psu is 88%, 92% and 88% for the same loads on 230V.

 

Any power supply with an 80 plus rating has to be at least 80% efficient. 

 

http://www.hardocp.com/article/2011/10/04/80_plus_irrelevant_to_you_when_buying_psu/2#.VJHmXE1yamw

[Enderman]

Where did you pull that wild figure from ? 

 

A Bronze rated psu is 81% @ 20% load, 85% at 50% load and 81% at 100% for 230V

 

A Gold rated psu is 88%, 92% and 88% for the same loads on 230V.

 

Any power supply with an 80 plus rating has to be at least 80% efficient. 

 

http://www.hardocp.com/article/2011/10/04/80_plus_irrelevant_to_you_when_buying_psu/2#.VJHmXE1yamw

This is basically how it is for all PSUs

[Guest]

This is basically how it is for all PSUs

The efficiency only starts dropping off when the load is below 20%. That goes for Bronze, Silver, Gold, Platinum and Titanium rated units. Like I said above, a Gold rated is only around 3-5% more efficient @ 50% load than a Bronze depending on the psu in question. In terms of electricity savings then you are talking pennies unless you are running the pc 24/7 365 days.