invest in a bigger case for 1, if your only mounting bracket is already blocked by the D14 you are in dire need of space
1 of the factors probably for you is that the fan isnt getting enough air, thus it cant cool
either that or its still at stock fan profile, stock fan profiles are trash anyway so best to make a custom one. My GTX670 for one would get 80+ degrees with stock profile, with a custom profile its still quiet but it only reaches max 71*C and thats in Crysis 2 at its max at 1080p (on a reference card)
(go with the flow, get a Cosmos II case, great case and lots of people use it, im using a Xpredator case though, a great case with many many fan spots in it and i have them all filled)
modding a card with water cooling is cool however, you only cool the GPU chip itself so keep that in mind, cause the card still has its vrm's and memory modules that need to be cooled.
could you give us your current case + build or something, that way we might be able to figure out the problem easier.
(or just post a picture of your current build)