560ti SLI + DED physx card 280gtx

A.josiah11

Junior Member
Jan 30, 2013
15
0
0
So i was trying to test out to see if i got any better performance In some games that use physx. Now when i put in the gtx280 and turn on my rig it only recognizes one 560 and the 280. Is it my motherboard or am i doing something wrong. I even took out the 280 and the booted back up and the 560's were in sli again. any advice would be awesome lol.

specs:

i7 3770k
Sabertooth z77
16gb 1866 gskill ram
corsair hx850
corsair H110
FD define XL R2
win 8 PRO