EVGA GeForce GTX 980 Ti HYBRID GAMING
GTX 980Ti SEA HAWK
POWERCOLOR DEVIL R9 390X
Gigabyte Waterforce GTX 980
Inno3d iChill GTX Titan X (suggested by Ehsas)
I am not clear about which design looks best. But, I know for sure which is the ugliest. (Ignore the poll)