dejanh

You should not have lapped the HK, it ruins the performance (see here).  Also, it would be good to see a test of this vs. HK CU and EK Supreme HF.

Great idea though.  I was toying myself with the idea of a hybrid air and water block about two years ago but I have no means of making it so I gave up.  I would definitely be interested in this with some refinement.

Edit: For the next test I would suggest that you add another radiator.  Adding another radiator factors out heat dissipation limitations of the radiator out of your test and then you can then safely test the HK performance (though should be unlapped) vs. your block.  Then I would do two things. 

First, I would run a test just water block vs. water block, no fan or anything added to your waterblock.  Then, second test should add a fan to your block and observe the temps again.  If the radiator is not the limiting factor this will give you a very accurate picture of the practical difference between two blocks in scenarios where you are not limited by an extreme water to air delta.

I hope this makes sense.

cade121

Only a bonger could design this block . If your water runs dry your air cooler takes over. The same thing if you have pump failure. Ingenious. I will make a prophecy that all blocks will be designed this way eventually. Major, major kudos Nate. I just spent big green upgrading my home theater in my new man cave or I would have Nate building me one right now.