Word is going around that NVIDIA has send out press invites for the launch of its first Pascal video cards. The rumor was published by Czech tech site PCTuning, which claims reviews and lots of information is incoming within three (maximum four) weeks.
I can’t be quite time-specific, but one thing is certain – the launch is approaching , since Nvidia already sends out invitations to the press presentation of the new cards. Reviews and all the information comes in three (maximum four) weeks. — PCTuning (Google Translation).
It's unknown if this will be a soft or a hard launch, other rumors point to availability in June.