Is my power supply sufficient to safely crossfire another GPU?

[Nine-Finger]

Hello,

I have been wanting to upgrade my GPU for a little while now, but I think crossfiring it would be a better option. However, I am unsure if my power supply can handle the extra wattage.

My system specs:

AMD FX-6300
ASUS R9-280 (non x version)
EVGA 750w Bronze certified
ASUS M5A97 LE R2.0 MOBO


So, can I safely crossfire two R9-280's with my current power supply?

 

[MasterDell]

That wattage should be enough.. Problem is that that PSU can't crossfire because it doesn't have enough PCI-e connectors.