would my Seasonic S12II 520w PSU run a Gigabyte R9 390 G1 Gaming GPU ?

[xenonnati]

So my Sapphire R9 270 died, got my money back today.
and i want to buy a Gigabyte R9 390 G1 Gaming 8Gb edition which is at a reasonable price (in my country they are a good 25-50% markup in price from america)

My question is if my Seasonic PSU could run this setup or do i need to get a new one?
if not would a newer Seasonic S12II Evo 620W modular unit do the job?

my current setup:
Mobo: Asus P8P67 (REV 3.1)
CPU: intel i5 2500k (1155 socket)
RAM: 2X 4GB DDR3 G-skill Ripjaws X (its the blue one not the red)
PSU: Seasonic S12II Bronze 520W - bought almost exactly 1 year ago
HDD: WD 5400RPM SATA .. (plan on switching a 7200 RPM one, as this one is old)
Cooling: 5x80mm fans 4 with led 1 without,
no fan controllers
CPU cooler: Zalman CNPS5X Performa

Other:
A4tech led keyboard
Zalman ZM-M350 mouse
5.1 sound card
1 Monitor (separately powered)
Deepcool Tesseract Case

EDIT: i don't overclock anything. don't really plan on doing it.

 

[ben001]

It needs a minimum 550~600 W power supply unit. Seasonic S12II Evo 620W will do your job.

 

[xenonnati]

It needs a minimum 550~600 W power supply unit. Seasonic S12II Evo 620W will do your job.

yeah thought that would be the case 🙁
But could you possibly clear up as to why all the online PSU calculators i tried ( entered all the correct info)
and they came up with 490-520, none of them going above the 520W for the recommended psu.
are they just not accurate? or is the " recommended" they display is actually the bare minimum?

anyway thank you for your answer.

 

[Mousemonkey]

It needs a minimum 550~600 W power supply unit. Seasonic S12II Evo 620W will do your job.

yeah thought that would be the case 🙁
But could you possibly clear up as to why all the online PSU calculators i tried ( entered all the correct info)
and they came up with 490-520, none of them going above the 520W for the recommended psu.
are they just not accurate? or is the " recommended" they display is actually the bare minimum?

anyway thank you for your answer.

Those PSU calculators are pants, you are still better off just adding up the power requirements of your components with that grey thing between your ears.

 

[mackswelll]

^agreed. those calculators are marginal at best. you will be MAXING out that 520w PSU.. especially if you wanna mess with over clocking!

 

[Dark Lord of Tech]

I would get a decent 550w to 650w.