Mousemonkey :
If it's a good one then yes, I'm using a 620w PSU for SLi'd 660Ti's.
Here's my setup
CPU: Intel i5 3550
MoBo: ASRock Z77 Extreme 4
SSD: OCZ Agility 3
HDD: WD Blue 1TB
HDD WD Blue 500GB (Laptop drive)
RAM: G.SKILL Ares 8GB (2x4GB)
GPU: GTX 660ti SC
PSU: OCZ Modxstream Pro 700W
Fans:
-2 CM SickleFlows 120mm
-1 CM Megaflow 200mm
-1 Scythe Kaze-Jyuni 120mm
-1 Corsair H60
Will I have enough remaining juice?