Gtx 560ti on 400w PSU

[johna567]

Can i run gtx 560ti on my old 400w PSU?
Im currently running gts 250,i want to upgrade to gtx 560ti,im not sure that my psu will handle the gtx 560ti.
Also i dont have cd drive.
My specs:
GTS 250 (to gtx 560ti)
CPU E8600
320GB HDD
4GB RAM DDR2

 

[renz496]

Gtx560ti use a bit more power than your old GTS250. did you already have that 560ti?