What in gods name do you need 3 480 rads for? A single 480 is more than enough for your CPU and graphics card. Those other two 480s are probably doing around 2% of the cooling work in that entire loop.
And if you are reaching 77 you might want to try a re-mount of your CPU block.
my voltage is over 1.424 so that's why it's as warm as it is. i7 cpus also are much warmer than AMD's or Intels i5-i3s. My cooler is mounted just perfectly, even got new TIM on there the other day, GC Extreme, went down 2 degrees when compared to before on Arctic Silver MX5. This is 77 under load btw, not in idle (after 20 minutes of prime 95).