Watt for psu

[Midnight9]

Checked a bunch of answers but im still not sure what is the min/max watts need it for my build, first time building a pc so i want to get it right, im looking for a good psu to last atleast 5+ years.
build:
Intel i5 4690k
msi gtx 960 2GB OC
msi Z97 gaming 5
corsair vengeance 8GB ram
samsung 850 evo 250GB
western digital 1TB blue
tp link wireless pci express adapter
Aerocool Strike-X Xtreme Devil Red

If anyone can help me out, please

someone told me to buy Thermaltake Toughpower 750W GOLD
but maybe thats too much?or not idk

*edit: i ended up buying the thermaltake(http://www.newegg.com/Product/Product.aspx?Item=N82E16817153198), found it in my country for 90 euros
Thank u all

 

[mp5mafia]

If the price is right , get it.
Otherwise I would stick with 650W though

 

[Rookie_MIB]

Assuming you're not going to overclock, the following rough estimates should be about right:

4690k - 90w
gtx 960 - 120w
mobo - 50w
assorted fans and drives - 50w

Rough wattage total = 310w assuming everything is loaded 100% (which isn't usually likely). Because PSUs are most efficient in the 50-75% load range, you want at least 25-50% headroom which means somewhere in the 500w-600w range should do you just fine. 750w is overkill by a lot.

You can get a Seasonic 520w for about $60.00 and they make some very high quality PSUs.

 

[Karadjgne]

Recommended wattage for a pc with a gtx960 is 430w minimum. The only problem there is decent quality psus are either 400w or 520/550w, so a tier3 or tier2 psu 550w would be good. You could also go as high as 750w, but the only cheaper cost psu there is the Evga B2 750. The XFX 550w is very good and usually newegg runs it on sale.

 

[mp5mafia]

There is one advantage to owning overkill psu (that's obviously if you not vegan and concern about increasing your electric bill by 0.00000001%) lol
Stronger psu will run cooler and if you get 1 with 0db aka 0rpm fan most likely you'll have a dead silent psu.

 

[Rookie_MIB]

There is one advantage to owning overkill psu (that's obviously if you not vegan and concern about increasing your electric bill by 0.00000001%) lol
Stronger psu will run cooler and if you get 1 with 0db aka 0rpm fan most likely you'll have a dead silent psu.

Not necessarily. Remember that the efficiency curve is exactly that. Starts off low, peaks at 40-50% load, then tapers down slowly. A PSU can theoretically waste MORE heat by running at idle loads (30-50w) than normal operating loads 200-400w if it's a properly sized PSU. Besides, overkill PSUs (AX1200i) are progressively more expensive too.

Most of the highly efficient PSUs in the proper size (500-600w gold rated) will be fairly affordable, and also have the semi-passive operation (zero fan on low loads)

EVGA Supernova 550w is about 90$. Very well rated.

 

[mp5mafia]

mp5mafia said:
There is one advantage to owning overkill psu (that's obviously if you not vegan and concern about increasing your electric bill by 0.00000001%) lol
Stronger psu will run cooler and if you get 1 with 0db aka 0rpm fan most likely you'll have a dead silent psu.


Not necessarily. Remember that the efficiency curve is exactly that. Starts off low, peaks at 40-50% load, then tapers down slowly. A PSU can theoretically waste MORE heat by running at idle loads (30-50w) than normal operating loads 200-400w if it's a properly sized PSU. Besides, overkill PSUs (AX1200i) are progressively more expensive too.

Most of the highly efficient PSUs in the proper size (500-600w gold rated) will be fairly affordable, and also have the semi-passive operation (zero fan on low loads)

EVGA Supernova 550w is about 90$. Very well rated.

That's not how the physics work. At low load even though efficiency drops you pulling less power so 12% of 120W is still less then 9% of 450W.

I was also refering to the 750W they choose with his friend not 1200W worth of overkill.

 

[Rookie_MIB]

mp5mafia said:

That's not how the physics work. At low load even though efficiency drops you pulling less power so 12% of 120W is still less then 9% of 450W.

I was also refering to the 750W they choose with his friend not 1200W worth of overkill.

Ah. Well when I think overkill, I really think overkill.

 

[mp5mafia]

mp5mafia said:
mp5mafia said:

That's not how the physics work. At low load even though efficiency drops you pulling less power so 12% of 120W is still less then 9% of 450W.

I was also refering to the 750W they choose with his friend not 1200W worth of overkill.



Ah. Well when I think overkill, I really think overkill.

Fair enough ... xD lol

 

[Karadjgne]

One problem with overkill psus is Intel stepping. When the cpu isn't under load, cpus back step to 1600MHz. This is a very low load, as low as 1% usage. Normally this won't be an issue, but this puts an extremely low load on the psu. Most psus not only drop efficiency near 20% load but also output ripple can get progressively worse. This usually isn't too much of an issue with high grade psus that already have very low ripple, but crap psus barely inside ATX specs can and do go out of spec under 20% use. This kind of instability isn't good for any component.