760 sli, is my 750w PSU good enough?

i have an evga supernova 750w 80+ bronze psu, running:

asrock extreme6

i7 3770k

evga gtx 760 4gb ftw 

8gb g skill ddr3 1600

120gb ssd

2tb hdd, 1tb hdd'

if i can get a good price on another 760 during the holiday season i will probably pick it up, will my psu be good enough? it has 4 12 volt rails @ 20 amps each. 

thank you~*

as long as you the the other card on a separate rail yeah it will be fine, to be honest though if you want to upgrade more powerful cards in  the future your going to have to change out that psu as 20 amps on a railisnt enough for gtx 770 that requires a 32 amp rail. just food for thought

question about that, what if i run two rails to the same card, since the card has 2 anyways (and my psu has mutliple), that would be 40amp via 2 rails, does that work the same way?