R9 280, PSU compatibility

[Master-9X]

Hello,
I have a 80+ Bronze PSU (550W Total), with single 12V rail with 35A (420W)
I'm planning to buy the new R9 280 Gigabyte (Not 280X, just 280)
Is my PSU enough ?
Gigabyte R9 280 OC
Spec:
- I7-3770 (not K)
- MSI Z77A-G45
- Seagate barracuda 1TO (7200 tpm)
- 8 Go ram corsair vengence
-Optical DVD drive

 

[herrwizo]

It should most certainly be enough, provided it is a quality brand.