So I've had my build for about 2-3 years and it's always had, well, high water temperatures under load.
i7 4770k @ 4.5GHz 1.25v
2x GTX 780ti's with a small overclock
The CPU will always stay under 70C and the GPUs will always stay under 55C.
The components are all crammed in a Corsair 350D with a top 240x30mm rad and a front 240x45mm rad. Under typical gaming loads like BF4 (what I consider a full gaming load) water temps always creep up to about 50C but never over. I'm more less here to write a note that all components I have are still fine, including pump and most importantly, tubing. I used the PrimoChill Advanced LRT. Just to share with others that worry if their liquid temp is too high.