GTX 770 Power Requirements

[ninjagaming11]

I am upgrading my PC from a R7 245 to a GTX 770 (Reference) I just want to know the power requirements. My specs:
PSU: CX500
CPU: i5-4430
GPU: R7 245 (Hopefully GTX 770)
HDD: WD Caviar Blue 1TB
SSD: 64 GB Sandisk
Case: Bitfenix Pandora
CPU Cooler: Corasair H60

Can I run a GTX 770? I don't plan to ever overclock, so I think it should be enough. The deals are crazy on them! GTX 770 for $299.99!

Thanks!

 

[Coolboy951]

you need at least 550 watt but to be safe a 600 watt would be good