Sorry man ... I falsely made the assumption that it works cause of the comments i show you. Hope you get an answer soon.
check this
https://bitcointalk.org/index.php?topic=1896901.0
I could release a 6GB version for nvidia. Would that help? The problem with a 4GB version is that it would be much slower. You can see this in the AMD version, the 4GB version runs about at half the speed.
check this
https://bitcointalk.org/index.php?topic=1896901.0
Hey optiminer, do you have any plans to create a 4GB nvidia version? Just curious, not here to badger about it. I'll just buy Zero instead if not 
I could release a 6GB version for nvidia. Would that help? The problem with a 4GB version is that it would be much slower. You can see this in the AMD version, the 4GB version runs about at half the speed.
Thanks a lot, man! I've sent a message to optiminer. Hopefully he'll release a 6gb version