Replace the cards you say ? thats the advice given ? 

we have 7 of them ... we are not a big enterprise so these cards cost us a lot of money ... Ticket is still open with nvidia ... they recognize it is an issue with their driver ... and keep giving an custom driver to solve the issue ... we are now 2 weeks further with no crash but it is total BS if you ask me we depend on an custom driver and reg key's we have to push in esx to create timeouts and so on. now we are stuck on version 13.4 because we work with their custom driver. i have a hate/love relationship with VDI at this point.