550W or 620W?

[parasight]

Hi, I have 2 options for powersupplies for my gaming rig, the specs are:
i5 3570K
Scythe Mugen 3 Rev.B
ASrock Z77 PRO3
Corsair Vengeance 16GB (2x8) 1600MHZ
Sapphire Dual-X 7970 3GB
Any 128GB SSD here
Seagate Barracuda 2TB 7200.14
which power supply should I get? I can choose between the Enermax NAXN 82+ 550W BULK and the SeaSonic S12II 620W.
Will the 550W be enough for future GPUs incase I'll be upgrading? or should I get the 620W instead?
Thanks.

 

[Rammy]

They are both solid PSUs, both 80Plus Bronze and both have 3 year warranties.
550W is sufficient for that setup, but if the price difference isn't huge, I'd grab the Seasonic.
The Enermax can only provide 456W of 12V power (83% of it's ticket wattage) which isn't lying but it's a bit misleading when I'd expect most good 550W PSUs to provide at least 500W on the 12V. The Seasonic for example provides up to 567W of 12V power (over 91% of stated output) which is far more consistent with what you'd expect from a quality PSU.

 

[bigcyco1]

SeaSonic S12II 620W is a much better choice

 

[parasight]

Thanks rammy, that really helped! I'll go for the seasonic.

 

[parasight]

Best answer selected by parasight.