[punx223]

poseidon is nice but not full LCS performance, more like 20C improved in my testing.... but still very capable for air/water hybrid.

as for the TITAN Z, its kind of pointless honestly for most gamers like us as it is triple slot card and price tag puts it at a point where its more advantageous to go with TI's as 3GB Vram will cover pretty much anything unless maybe surround 4K

EDIT: TITAN Z is more targeted at budget compute for those looking for a compute card without the NV "Professional" price tag.