Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
Which blocks are you using on you 670s? Cause a lot of the 670 blocks can be reused on 970s.
Have just found this link...
http://www.coolingconfigurator.com/waterblock/3831109856482
interesting..