I happened to give the Pascal Titan X a try with this,

Results at stock, ~30.8 Mh/s in ETH and 300 Mh/s in DCR

Bumped up memory to +400 and got

34 Mh/s in ETH and 331 Mh/s in DCR

Definitely not a cost effective card but thought I'd post the numbers if anyone was curious. This was done in Windows 10 with the v6.4 build btw