well he said "which maximum graphics card of nvidia gtx can i put in Foxconn H-Coupertino2-H61 TX"
he is probably going all out
but il reply to him this way ... with That PSU you can use ANy nvidia GPU
hierarchy order for nvidia GPus is Like this >>>
980 ti
980 not worth it eiter go for 980ti or take 970 becouse its only 15% difrecne betin 970 and 980
780ti old generation gpu
970
960
dont botther with any other gpu ...