Power wattage build problem.

[LazzyDonut]

Hello Forum,

 

So I'm building my own pc and of cours I need a power supply, so i calculated my minimum wattage with http://www.coolermaster.outervision.com/, now this site tells me i need a minimum of 379W. Now here comes the problem, while the website tells me to take a minimum of 379W, my videocard(msi 970 gaming 4G) specs tel me that it needs a minimum of 500W.

So what do I do?

 

thank you in advance and sincearly,

 

LazzyDonut.

[SkywardKkalox]

http://pcpartpicker.com/part/evga-power-supply-100w10500kr

This PSU is great for it's price and reliability while also being 500w.

[ZetZet]

Get 500W. It would work with 400W, but psu's are most efficient around 50-70% load.

[Sakkura]

The "requirements" for graphics cards are exaggerated to account for many bad power supplies being unable to deliver their rated wattage, as well as for the varying configurations (the GPU makers have to assume the most power-hungry CPU etc).

 

For your current configuration, a 450W power supply would be a fine choice. Lower than that rarely really saves you any money. Going 500-550W would give you more room for upgrades though.

[Sakkura]

Get 500W. It would work with 400W, but psu's are most efficient around 50-70% load.

 

His system will draw less than 250W most of the time though, so a 500W power supply would be less efficient than an equivalent 400W power supply most of the time. That said, it's a tiny difference either way.

[MOR0095]

i would trust the calculator. i asked online if i could crossfire 2 r9 290s and everyone said no. but the psu wattage calculators all said i only needed 680w psu.