I've also received this card from nVidia as a review/test sample. still installing drivers for it....
Are you using a 1x to 16x powered riser? or a 16x to 16x unpowered one?
EDIT: now I am getting bluescreens trying to mine (SYSTEM_SERVICE_EXCEPTION in nvlddkm.sys)
even with all overclocking removed.
Not a good start into the Maxwell era for me.
It's a 1x to 16x powered riser, this one:
http://i.imgur.com/4lOw8S8.jpgIt does run cool though.. Less that 40c while hashing away, measure at top of heatsink.
http://i.imgur.com/ZrJ8c5D.jpgAn yes.. I too am seeing a real delay with BTER deposits as well.