R9 390 and I5-6600K PSU

[AsukaNii]

Do i need to get 750W or just 650W enough?

[The Official Czex]

500W will run the build in my signature. You can get by with 500W, easy.

[ThatOneRussian]

if you use pcpartpicker it should tell you I recommend using around 100-200 more than pcpartpicker says your system will use

[AsukaNii]

500W will run the build in my signature. You can get by with 500W, easy.

but is 650W enough?

[WereCat]

500W will run it just fine (quality PSU that is).

You can get 550W-600W if you want to have more headroom. 750W is just overkill.. you can run 2x R9 390 with it.

[Castdeath97]

but is 650W enough?

Yeah get a G2/GS/S12 600-650W unit.

[The Official Czex]

but is 650W enough?

 

I literally just said 500W is enough. 650W is plenty.

 

Get an XFX or SeaSonic PSU. Anyone from those brands are excellent.

[AsukaNii]

I literally just said 500W is enough. 650W is plenty.

 

Get an XFX or SeaSonic PSU. Anyone from those brands are excellent.

Just in case extra Watts will not hurt right

[mapegl]

Yeah I totally agree: 500W is enough. My rig (being a less power efficient one) uses about 500W from the wall under a full artificial load. So assuming I have about 80-85% efficiency which results to my PSU "only" providing about 400W!!! , there is still some room there, BUT I would recommend getting a 650W. You will sit at about half the posiible load resulting in a higher efficiency from your PSU (they have those fancy graphs that usually show you where power efficiency is highest for your PSU, usually being around 50-60%) and therefore lower tempereatures and noise while also having the possibility (although most people never do) to change something to a higher-tier card or something.

[The Official Czex]

Just in case extra Watts will not hurt right

 

No, not at all. Your components will only receive the power they need from your PSU. No more, no less. 

[Elehat]

You probably shouldn't get loads more wattage than you need, because of the cost, but also because PSUs have an efficiency curve with a peak somewhere in the middleish. Your power unit will work most effectively when it is appropriately matched with components.

[STRMfrmXMN]

Do i need to get 750W or just 650W enough?

EVGA's GQ/GS/B2/G2 are good options for you, 550W being enough.

[freddiecannon330]

650 watt power supply is sufficient for the that Gpu its better to be future proof always.